4710-12-178-0952

3020-14-254-2601 3020142542601 142542601 is a pulley with one or more grooved faces or rims of the same diameter. for pulleys encased in a shell or frame, see block, tackle.for items specifically designed for aviation, see pulley(1), groove, aviation.

3110-01-254-2601 3110012542601 012542601 BEARING,BALL,THRUST

2815-22-254-2601 2815222542601 222542601 is a deformable material which prevents the passage of matter through the joint formed when two faces are joined. it may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. it may be made to any predetermined dimension and shape. excludes flat disks, items made of felt material and items having joints. for round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. excludes disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.