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29 CFR Part 510, Appendix A

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov

This appendix contains a listing of all manufacturing industries for which data were collected and compiled by the Commonwealth of Puerto Rico for purposes of implementing the 1989 Amendments to FLSA. This listing follows the order and classifications used in the SIC Manual, 1987, which is incorporated by reference in these regulations (§ 510.21).

The data in this appendix are presented by major industry group (two-digit classification), industry group number (three-digit classification), and industry number (four-digit classification). Tiers will not be listed for industry categories in which there were fewer than three employers, in conformance with standard procedures used by the Commonwealth of Puerto Rico in collecting and publishing these data until such time as Puerto Rico receives appropriate waivers of confidentiality from all employers in such categories. These categories are noted with an “a” on the following table. In addition, no tier will be listed where an industry was not included in the original survey, because it was not in existence, because the industry was too small to be included, or for other reasons.

Employers who do not find the four-digit classification for their industry shall refer to the appropriate three-digit classification under which their establishment falls. If the appropriate three-digit classification is not listed, employers shall refer to the appropriate two-digit classification. For example, no tier is listed for industry number 2034, dried and dehydrated fruits, vegetables, and soup mixes. Thus, an employer in industry 2034 must use the tier listed for industry group 203, i.e. Tier 2.

Further, employers who find the appropriate four-digit designation in this appendix must use that designation and cannot refer to a two- or three-digit classification. For example, an employer in industry number 2033, canned fruits, vegetables, preserves, jams, and jellies, which has a Tier 1 designation, cannot use the Tier 2 designation of industry group 203, canned, frozen, and preserved fruits, vegetables, and food specialties.

If no four-digit, three-digit, or two-digit classification is listed for an industry, employees in that group must pay the Tier 1 rates.

Important: In referring to this appendix to determine appropriate tier designations, please note that certain categories of employees are subject to treatment under Tier 1 regardless of the average hourly wage rate for the industry and the tier designation contained herein. These employees, as listed in the 1989 Amendments, are those employed by:

(a) The United States

(b) An establishment that is a hotel, motel, or restaurant, or

(c) Any other retail or service establishment that employs such employee in connection with the preparation or offering of food or beverages for human consumption, either on the premises, or by such services as catering, banquet, box lunch, or curb or counter service, to the public, to employees, or to members or guests of clubs.

Please note that these named categories may not correspond exactly to categories established by the SIC manual.

Major groupIndustry group numberIndustry numberTierIndustry
20|1Food and kindred products.
201| 2Meat products.
20112Meat packing plants.
20131Sausages and other prepared meat products.
20152Poultry slaughtering and processing.
202| 1Dairy products.
2022aNatural, processed, and imitation cheese.
20231Dry, condensed, and evaporated dairy products.
20241Ice cream and frozen desserts.
20261Fluid milk.
203| 2Canned, frozen, and preserved fruits, vegetables, and food specialties.
2032aCanned specialties.
20331Canned fruits, vegetables, preserves, jams, and jellies.
20353Pickled fruits and vegetables, vegetable sauces and seasonings, and salad dressings.
20372Frozen fruits, fruit juices, and vegetables.
20383Frozen specialties, not elsewhere classified.
204| 1Grain mill products.
2041aFlour and other grain mill products.
2043aCereal breakfast foods.
20441Rice milling.
20451Prepared flour mixes and doughs.
20461Wet corn milling.
20481Prepared feeds and feed ingredients for animals and fowls, except dogs and cats.
205| 1Bakery products.
20511Bread and other bakery products, except cookies and crackers.
20521Cookies and crackers.
2053aFrozen bakery products, except bread.
206| 1Sugar and confectionery products.
20611Cane sugar, except refining.
2062aCane sugar refining.
20641Candy and other confectionery products.
20663Chocolate and cocoa products.
2067aChewing gum.
208| 1Beverages.
20821Malt beverages.
20843Wines, brandy, and brandy spirits.
20851Distilled and blended liquors.
20861Bottled and canned soft drinks and carbonated waters.
20871Flavoring extracts and flavoring syrups, not elsewhere classified.
209| 1Miscellaneous food preparations and kindred products.
20911Canned and cured fish and seafoods.
20952Roasted coffee.
20961Potato chips, corn chips, and similar snacks.
20973Manufactured ice.
2098aMacaroni, spaghetti, vermicelli, and noodles.
20992Food preparations, not elsewhere classified.
21|1Tobacco products.
211| aCigarettes.
2111aCigarettes.
212| 1Cigars.
21211Cigars.
213| 1Chewing and smoking tobacco and snuff.
21311Chewing and smoking tobacco and snuff.
214| aTobacco stemming and redrying.
2141aTobacco stemming and redrying.
22|1Textile mill products.
221| 1Broadwoven fabric mills, cotton.
22111Broadwoven fabric mills, cotton.
224| 1Narrow fabric and other smallwares mills: cotton, wool, silk, and manmade fiber.
22411Narrow fabric and other smallwares mills: cotton, wool, silk, and manmade fiber.
225| 2Knitting mills.
22511Women's full-length and knee-length hosiery, except socks.
22532Knit outerwear mills.
22543Knit underwear and nightwear mills.
226| 1Dyeing and finishing textiles, except wool fabrics and knit goods.
22613Finishers of broadwoven fabrics of cotton.
22621Finishers of broadwoven fabrics of manmade fiber and silk.
227| 1Carpets and rugs.
22731Carpets and rugs.
228| 3Yarn and thread mills.
22813Yarn spinning mills.
23|2Apparel and other finished products made from fabrics and similar materials.
231| 3Men's and boys' suits, coats, and overcoats.
23113Men's and boys' suits, coats, and overcoats.
232| 2Men's and boys' furnishings, work clothing, and allied garments.
23212Men's and boys' shirts except work shirts.
23221Men's and boys' underwear and nightwear.
23232Men's and boys' neckwear.
23252Men's and boys' separate trousers and slacks.
23263Men's and boys' work clothing.
23293Men's and boys' clothing, not elsewhere classified.
233| 3Women's, misses', and juniors' outerwear.
23313Women's, misses', and juniors' blouses and shirts.
23353Women's, misses', and juniors dresses.
23373Women's, misses, and juniors' suits, skirts, and coats.
23392Women's, misses', and juniors' outerwear, not elsewhere classified.
234| 2Women's, misses', children's, and infants' undergarments.
23412Women's, misses', children's, and infants' underwear and nightwear.
23422Brassieres, girdles, and allied garments.
235| 3Hats, caps, and millinery
23533Hats, caps, and millinery
236| 3Girls', children's, and infants' outerwear.
23613Girls', children's, and infants' dresses, blouses, and shirts.
23693Girls', children's, and infants' outerwear, not elsewhere classified.
238| 3Miscellaneous apparel and accessories.
23853Waterproof outerwear.
23873Apparel belts.
23893Apparel and accessories, not elsewhere classified.
239| 3Miscellaneous fabricated textile products.
23912Curtains and draperies.
23923Housefurnishings, except curtains and draperies.
23933Textile bags.
23952Pleating, decorative and novelty stitching, and tucking for the trade.
23962Automotive trimmings, apparel findings, and related products.
23993Fabricated textile products, not elsewhere classified.
24|2Lumber and wood products, except furniture.
242| 3Sawmills and planing mills.
24213Sawmills and planing mills, general.
243| 2Millwork, veneer, plywood, and structural wood members.
24312Millwork.
24342Wood kitchen cabinets.
2435aHardwood veneer and plywood.
244| 3Wood containers.
24483Wood pallets and skids.
245| 3Wood buildings and mobile homes.
24513Mobile homes.
249| 2Miscellaneous wood products.
24912Wood preserving.
24992Wood products, not elsewhere classified.
25|2Furniture and fixtures.
251| 3Household furniture.
25113Wood household furniture, except upholstered.
25123Wood household furniture, upholstered.
25143Metal household furniture.
25152Mattresses, foundations, and convertible beds.
25173Wood television, radio, phonograph, and sewing machine cabinets.
25193Household furniture, not elsewhere classified.
252| 2Office furniture.
2521aWood office furniture.
25222Office furniture, except wood.
253| 3Public building and related furniture.
25313Public building and related furniture.
254| 1Partitions, shelving, lockers, and office and store fixtures.
25412Wood office and store fixtures, partitions, shelving, and lockers.
25421Office and store fixtures, partitions, shelving, and lockers, except wood.
259| 2Miscellaneous furniture and fixtures.
25913Drapery hardware and window blinds and shades.
2599aFurniture and fixtures, not elsewhere classified.
26|1Paper and allied products.
261| 1Pulp mills.
26111Pulp mills.
262| 2Paper mills.
26212Paper mills.
263| aPaperboard mills.
2631aPaperboard mills.
265| 1Paperboard containers and boxes.
26521Setup paperboard boxes.
26531Corrugated and solid fiber boxes.
26551Fiber cans, tubes, drums, and similar products.
26571Folding paperboard boxes, including sanitary.
267| 1Converted paper and paperboard products, except containers and boxes.
26712Packaging paper and plastics film, coated and laminated.
2672aCoated and laminated paper, not elsewhere classified.
26732Plastics, foil, and coated paper bags.
26741Uncoated paper and multiwall bags.
26761Sanitary paper products.
26771Envelopes.
26783Stationery, tablets, and related products.
2679aConverted paper and paperboard products, not elsewhere classified.
27|1Printing, publishing, and allied industries.
271| 1Newspapers: publishing, or publishing and printing.
27111Newspapers: publishing, or publishing and printing.
273| aBooks.
2731aBooks: publishing, or publishing and printing.
27323Book printing.
274| 1Miscellaneous publishing.
27411Miscellaneous publishing.
275| 1Commercial printing.
27521Commercial printing, lithographic.
27541Commercial printing, gravure.
27591Commercial printing, not elsewhere classified.
276| 1Manifold business forms.
27611Manifold business forms.
278| 1Blankbooks, looseleaf binders, and bookbinding and related work.
27821Blankbooks, looseleaf binders and devices.
279| 1Service industries for the printing trade.
27961Platemaking and related services.
28|1Chemicals and allied products.
281| 1Industrial inorganic chemicals.
28131Industrial gases.
28191Industrial inorganic chemicals, not elsewhere classified.
282| 1Plastics materials and synthetic resins, synthetic rubber, cellulosic and other manmade fibers, except glass.
2821aPlastics materials, synthetic resins, and nonvulcanizable elastomers.
28222Synthetic rubber (vulcanizable elastomers).
283| 1Drugs.
28331Medicinal chemicals and botanical products.
28341Pharmaceutical preparations.
28351In vitro and in vivo diagnostic substances.
28361Biological products, except diagnostic substances.
284| 1Soap, detergents, and cleaning preparations; perfumes, cosmetics, and other toilet preparations.
28411Soap and other detergents, except specialty cleaners.
28421Specialty cleaning, polishing, and sanitation preparations.
28441Perfumes, cosmetics, and other toilet preparations.
285| 1Paints, varnishes, lacquers, enamels, and allied products.
28511Paints, varnishes, lacquers, enamels, and allied products.
286| 1Industrial organic chemicals.
28651Cyclic organic crudes and intermediates, and organic dyes and pigments.
2869aIndustrial organic chemicals, not elsewhere classified.
287| 1Agricultural chemicals.
28731Nitrogenous fertilizers.
28791Pesticides and agricultural chemicals, not elsewhere classified.
289| 1Miscellaneous chemical products.
28911Adhesives and sealants.
28991Chemicals and chemical preparations, not elsewhere classified.
29|1Petroleum refining and related industries.
291| 1Petroleum refining.
29111Petroleum refining.
295| 1Asphalt paving and roofing materials.
29511Asphalt paving mixtures and blocks.
29521Asphalt felts and coatings.
299| aMiscellaneous products of petroleum and coal.
2992aLubricating oils and greases.
30|1Rubber and miscellaneous plastics products.
302| 1Rubber and plastics footwear.
30211Rubber and plastics footwear.
305| 2Gaskets, packing, and sealing devices and rubber and plastics hose and belting.
30522Rubber and plastics hose and belting.
306| 2Fabricated rubber products, not elsewhere classified.
30692Fabricated rubber products, not elsewhere classified.
308| 1Miscellaneous plastics products.
3081aUnsupported plastics film and sheet.
30823Unsupported plastics profile shapes.
30831Laminated plastics plate, sheet, and profile shapes.
3084aPlastics pipe.
30851Plastics bottles.
30862Plastics foam products.
30873Custom compounding of purchased plastics resin.
30881Plastics plumbing fixtures.
30891Plastics products, not elsewhere classified.
31|2Leather and leather products.
313| 2Boot and shoe cut stock and findings.
31312Boot and shoe cut stock and findings.
314| 2Footwear, except rubber.
3142bHouse slippers.
31432Men's footwear, except athletic.
31441Women's footwear, except athletic.
31492Footwear, except rubber, not elsewhere classified.
315| 3Leather gloves and mittens.
31513Leather gloves and mittens.
316| 3Luggage.
31613Luggage.
317| 2Handbags and other personal leather goods.
31713Women's handbags and purses.
31721Personal leather goods, except women's handbags and purses.
32|1Stone, clay, glass, and concrete products.
321| 2Flat glass.
32112Flat glass.
322| 1Glass and glassware, pressed or blown.
32211Glass containers.
323| 1Glass products, made of purchased glass.
32311Glass products, made of purchased glass.
324| 1Cement, hydraulic.
32411Cement, hydraulic.
326| 3Pottery and related products.
32613Vitreous china plumbing fixtures and china and earthenware fittings and bathroom accessories.
32693Pottery products, not elsewhere classified.
327| 1Concrete, gypsum, and plaster products.
32712Concrete block and brick.
32721Concrete products, except block and brick.
32731Ready-mixed concrete.
32741Lime.
3275aGypsum products.
328| 1Cut stone and stone products.
32811Cut stone and stone products.
329| 1Abrasive, asbestos, and miscellaneous nonmetallic mineral products.
3295aMinerals and earths, ground or otherwise treated.
32961Mineral wool.
33|1Primary metal industries.
331| 1Steel works, blast furnaces, and rolling and finishing mills.
33121Steel works, blast furnaces (including coke ovens), and rolling mills.
33171Steel pipe and tubes.
334| 1Secondary smelting and refining of nonferrous metals.
33411Secondary smelting and refining of nonferrous metals.
335| 1Rolling, drawing, and extruding of nonferrous metals.
33511Rolling, drawing, and extruding of copper.
3353aAluminum sheet, plate, and foil.
33541Aluminum extruded products.
336| aNonferrous foundries (castings).
3365aAluminum foundries.
339| 1Miscellaneous primary metal products.
3398aMetal heat treating.
33991Primary metal products, not elsewhere classified.
34|1Fabricated metal products, except machinery and transportation equipment.
341| 1Metal cans and shipping containers.
34111Metal cans.
34121Metal shipping barrels, drums, kegs, and pails.
342| 1Cutlery, handtools, and general hardware.
34213Cutlery.
3423aHand and edge tools, except machine tools and handsaws.
3429aHardware, not elsewhere classified.
343| 2Heating equipment, except electric and warm air; and plumbing fixtures.
34332Heating equipment, except electric and warm air furnaces.
344| 2Fabricated structural metal products.
34411Fabricated structural metal.
34422Metal doors, sash, frames, molding, and trim.
34431Fabricated plate work (boiler shops).
34442Sheet metal work.
34463Architectural and ornamental metal work.
34492Miscellaneous structural metal work.
345| 1Screw machine products, and bolts, nuts, screws, rivets, and washers.
34521Bolts, nuts, screws, rivets, and washers.
346| 1Metal forgings and stampings.
34691Metal stampings, not elsewhere classified.
347| 2Coating, engraving, and allied services.
34712Electroplating, plating, polishing, anodizing and coloring.
349| 2Miscellaneous fabricated metal products.
34941Valves and pipe fittings, not elsewhere classified.
34952Wire springs.
34961Miscellaneous fabricated wire products.
3498aFabricated pipe and pipe fittings.
34992Fabricated metal products, not elsewhere classified.
35|1Industrial and commercial machinery and computer equipment.
353| aConstruction, mining, and materials handling machinery and equipment.
3535aConveyors and conveying equipment.
354| 1Metalworking machinery and equipment.
3541aMachine tools, metal cutting types.
35441Special dies and tools, die sets, jigs and fixtures, and industrial molds.
35451Cutting tools, machine tool accessories, and machinists' precision measuring devices.
355| 1Special industry machinery, except metalworking machinery.
35551Printing trades machinery and equipment.
356| 1General industrial machinery and equipment.
3562aBall and roller bearings.
35631Air and gas compressors.
3564aIndustrial and commercial fans and blowers and air purification equipment.
35681Mechanical power transmission equipment, not elsewhere classified.
35691General industrial machinery and equipment, not elsewhere classified.
357| 1Computer and office equipment.
35713Electronic computers.
35721Computer storage devices.
35771Computer peripheral equipment, not elsewhere classified.
35791Office machines, not elsewhere classified.
358| 1Refrigeration and service industry machinery.
35851Air-conditioning and warm air heating equipment and commercial and industrial refrigeration equipment.
3589bService industry machinery, not elsewhere classified.
359| 2Miscellaneous industrial and commercial machinery and equipment.
35922Carburetors, pistons, piston rings, and valves.
3596aScales and balances, except laboratory.
35991Industrial and commercial machinery and equipment, not elsewhere classified.
36|1Electronic and other electrical equipment and components, except computer equipment.
361| 1Electronic transmission and distribution equipment.
36121Power, distribution, and specialty transformers.
36131Switchgear and switchboard apparatus.
362| 1Electrical industrial apparatus.
36211Motors and generators.
36241Carbon and graphite products.
36251Relays and industrial controls.
36291Electrical industrial apparatus, not elsewhere classified.
363| aHousehold appliances.
3639aHousehold appliances, not elsewhere classified.
364| 1Electric lighting and wiring equipment.
36411Electric lamp bulbs and tubes.
36431Current-carrying wiring devices.
36441Noncurrent-carrying wiring devices.
3645aResidential electric lighting fixtures.
36462Commercial, industrial, and institutional electric lighting fixtures.
36482Lighting equipment, not elsewhere classified.
365| 1Household audio and video equipment, and audio recordings.
36511Household audio and video equipment.
3652aPhonograph records and pre-recorded audio tapes and disks.
366| 1Communications equipment.
36611Telephone and telegraph apparatus.
36631Radio and television broadcasting and communications equipment.
36691Communications equipment, not elsewhere classified.
367| 1Electronic components and accessories.
36722Printed circuit boards.
36741Semiconductors and related devices.
36772Electronic coils, transformers and other inductors.
36781Electronic connectors.
36791Electronic components, not elsewhere classified.
369| 1Miscellaneous electrical machinery, equipment, and supplies.
36921Primary batteries, dry and wet.
36941Electrical equipment for internal combustion engines.
37|1Transportation Equipment.
371| 1Motor vehicles and motor vehicle equipment.
37131Truck and bus bodies.
37141Motor vehicle parts and accessories.
372| 1Aircraft and parts.
3721aAircraft.
37281Aircraft parts and auxiliary equipment, not elsewhere classified.
373| 1Ship and boat building and repairing.
3731aShip building and repairing.
37322Boat building and repairing.
379| aMiscellaneous transportation equipment.
3792aTravel trailers and campers.
38|1Measuring, analyzing, and controlling instruments; photographic, medical, and optical goods, watches and clocks.
381| 1Search, detection, navigation, guidance, aeronautical, and nautical systems, instruments, and equipment.
38121Search, detection, navigation, guidance, aeronautical, and nautical systems, instruments, and equipment.
382| 1Laboratory apparatus and analytical, optical, measuring, and controlling instrument.
38211Laboratory apparatus and furniture.
38221Automatic controls for regulating residential and commercial environments and appliances.
38231Industrial instruments for measurement, display, and control of process variables; and related products.
3824aTotalizing fluid meters and counting devices.
38251Instruments for measuring and testing of electricity and electrical signals.
38292Measuring and controlling devices, not elsewhere classified.
384| 1Surgical, medical, and dental instruments and supplies.
38411Surgical and medical instruments and apparatus.
38421Orthopedic, prosthetic, and surgical appliances and supplies.
38431Dental equipment and supplies.
3844aX-ray apparatus and tubes and related irradiation apparatus.
38451Electromedical and electrotherapeutic apparatus.
385| 1Ophthalmic goods.
38511Ophthalmic goods.
386| aPhotographic equipment and supplies.
3861aPhotographic equipment and supplies.
387| 1Watches, clocks, clockwork operated devices, and parts.
38731Watches, clocks, clockwork operated devices, and parts.
39|1Miscellaneous manufacturing industries.
391| 1Jewelry, silverware, and plated ware.
39111Jewelry, precious metal.
3914aSilverware, plated ware, and stainless steel ware.
39151Jewelers' findings and materials, and lapidary work.
394| 2Dolls, toys, games, and sporting and athletic goods.
39422Dolls and stuffed toys.
39492Sporting and athletic goods, not elsewhere classified.
395| 2Pens, pencils, and other artists' materials.
39513Pens, mechanical pencils, and parts.
3952aLead pencils, crayons, and artists' materials.
39531Marking devices.
396| 1Costume jewelry, costume novelties, buttons, and miscellaneous notions, except precious metal.
39611Costume jewelry and costume novelties, except precious metal.
3965aFasteners, buttons, needles, and pins.
399| 1Miscellaneous manufacturing industries.
3991aBrooms and brushes.
39932Signs and advertising specialties.
39952Burial caskets.
39992Manufacturing industries, not elsewhere classified.

a = Category contained less than three employers.

[55 FR 12120, Mar. 30, 1990; 55 FR 12778, Apr. 5, 1990, as amended at 55 FR 39575, Sept. 27, 1990; 57 FR 1103, Jan. 10, 1992]