Industry: 5031—Lumber, Plywood, Millwork, and Wood Panels
Establishments, with or without yards, primarily engaged in the wholesale distribution of rough, dressed, and finished lumber (but not timber); plywood; reconstituted wood fiber products; doors and windows and their frames (all materials); wood fencing; and other wood or metal millwork.

Composite board products, wood-based—wholesalePaneling wood—wholesale
Door frames, all materials—wholesaleParticleboard—wholesale
Enameled tileboard (hardboard)—wholesalePlywood—wholesale
Fencing, wood—wholesaleShingles wood—wholesale
Hardboard—wholesaleStructural assemblies prefabricated wood—wholesale
Kitchen cabinets to be built in—wholesaleVeneer—wholesale
Lumber rough, dressed, and finished—wholesaleWallboard—wholesale
Medium density fiberboard—wholesaleWindow frames all materials—wholesale
Metal doors, sash and trim—wholesaleWindows and doors—wholesale
Millwork—wholesaleWood siding—wholesale
Molding all materials—wholesale
Codes Titles Number of US Businesses
5031Lumber, Plywood, and Millwork19,795
503100Lumber, plywood, and millwork2,779
50310000Lumber, plywood, and millwork2,779
503101Building materials, exterior1,390
50310100Building materials, exterior1,283
50310101Fencing, wood66
50310102Shingles, wood11
50310103Siding, wood16
50310104Trim, sheet metal14
503102Building materials, interior1,042
50310200Building materials, interior425
50310201Enameled tileboard3
50310202Molding, all materials176
50310203Paneling, wood24
503103Doors and windows9,547
50310300Doors and windows1,545
50310301Door frames, all materials176
50310302Doors, combination, screen-storm26
50310303Doors, garage460
50310304Doors, nec707
50310305Metal doors, sash and trim106
50310306Window frames, all materials47
50310308Skylights, all materials44
503199Lumber, plywood, and millwork, nec5,037
50319901Composite board products, woodboard66
50319903Kitchen cabinets1,563
50319904Lumber: rough, dressed, and finished1,287
50319905Medium density fiberboard5
50319907Pallets, wood262
50319910Structural assemblies, prefabricated: wood51