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53 - Hardware and Abrasives


PSC Description 
5305 Screws 
5306 Bolts 
5307 Studs 
5310 Nuts & washers 
5315 Nails, machine keys & pins 
5320 Rivets 
5325 Fastening devices 
5330 Packing & gasket materials 
5331 O-Ring 
5335 Metal screening 
5340 Hardware, commercial 
5341 Brackets 
5342 Hardware, weapon system 
5345 Disks & stones, abrasive 
5350 Abrasive materials 
5355 Knobs & pointers 
5360 Coil, flat, leaf & wire springs 
5365 Bushings, rings, shims & spacers 

GROUP 53 Hardware and Abrasives

5305 Screws

5306 Bolts

5307 Studs

5310 Nuts and Washers Note Nuts and washers, including spe- cially designed, are to be classified in this FSC. a. Nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. Washers are a perforated piece of metal, leather, or other materials of various shapes or forms. They are used primarily as a seat for a bolt, nut, screw, rivet or nail to dis- tribute pressure and prevent endwise mo- tion over an area and/or to prevent move- ment between two parts by means of restraining features created by the shape of its edges. Includes Locknuts; Eye Nuts; Plain Nuts; Castellated Nuts; Wing Nuts; Plate Nuts; Push on Nuts; Concave and Convex Washers; Flat Washers; Keyed Washers; Lock Washers; Shouldered Washers; Split Washers. Excludes Bearing Thrust Washers (FSC

3120); Shims (FSC 5365); Ring Spacers (FSC 5365); Plate Spacers (FSC 5365); Lock Rings (FSC 5365).

5315 Nails, Machine Keys, and Pins Note Nails, machine keys, and pins, including specially designed, will be clas- sified in this FSC. a. Nails are slender, usually pointed fasteners with a head, and designed for insertion by impact. b. Machine keys are items generally in- serted between two items, usually in a groove, to prevent relative rotation e.g., shaft and hub. c. Pins are cylindrical items of various materials used to align/attach two or more parts together and may allow for angular movement. 33 Includes Dowel Pins, Split Pins; Spikes; Tacks; Nonoffice Type Staples; Machine Keys; Brads; Shouldered Pins; Cotter Pins; Nails. Excludes Shafts (FSC 3040); Lock Keys (FSC 5340).

5320 Rivets

5325 Fastening Devices Includes Eyelets; Grommets; Aircraft Cowling Fasteners; Textile Fasteners; Re- taining Rings; Threaded Inserts.

5330 Packing and Gasket Materials Note This FSC includes only seals and gaskets designed for standard use. Seals, gaskets and packing are made from materials specifically designed and constructed to resist deterioration from the action of heat, gas, chemicals, liquids, and used to fill a cavity and create a tight seal. Similar materials used to make seals, gaskets, and packing are available in bulk form, refer to FSG 93, FSG 80, and FSG 83. Includes General Purpose Oil Grease, Air, Liquid, Gas, and chemical Seals; Oa- kum; Prefabricated Gaskets and Seals designed for a single specific application. Excludes O-Rings (FSC 5331); Bulk ma- terial items, such as; Rubber, Cork, and Asbestos Sheets and Strips (FSG 93); Liquid Gasket Materials (RTV, Permatex, etc.) (FSG 80); RFI and EMI Seals and Gaskets (FSC 5999), and all Seal Retain- ers.

5331 O-Ring Excludes Packing and Gasket Material (FSC 5330).

5335 Metal Screening Note Metal Screening is a perforated plate or cylinder or a meshed wire fabric usually mounted and used to separate coarse from finer parts. Includes Insect Screening; Industrial Metal Cloth; Industrial Metal Mesh. Excludes Fencing (FSC 5660).

5340 Hardware, Commercial Note Common hardware designed pri- marily for commercial use will be classi- fied in this FSC. Hardware is the physical, tangible and permanent components of end items that may not be classified else- where. It consists also of common items that are commonly used in construction and/or manufacturing (e.g., hinges, door locks). Includes Access Covers; Bumpers; Cast- ers; Cabinet and Door Hardware; Clev- ises; Hinges; Latches; Straps and Strap- ping; Turnbuckles; Webbed Straps. Excludes Weapons System Hardware (FSC 5342).

5341 Brackets Note All brackets, including specially designed for specific use an/or applica- tion, will be classified in this FSC. Brack- ets are items of rigid construction that sustain a secondary item. Includes Angle Brackets; Double Angle Brackets; Mounting Brackets. Excludes Corner Braces (FSC 5340); T Braces (FSC 5340); Mending Plates (FSC 5340).

5342 Hardware, Weapon System Note Hardware designed for weapon systems unique applications will be clas- sified in this FSC. Includes Adapters; Anchor Plates and Straps; Anodes; Bellows; Couplings; Con- trol Rods; Access Doors; Fairleads; Mounts; Tie Rods; Yokes. Excludes Commercial Hardware (FSC


5345 Disks and Stones, Abrasive Includes Abrasive Belts and Belting; Hones; Abrasive Wheels, Multiapplica- tion. Excludes Dental Abrasives; Abrasive Cones, and other Abrasive Attachments for equipment.

5350 Abrasive Materials Includes Cloth; Papers; Powders; Abra- sive Polishing Compounds; Metal Finish- ing Abrasives; Industrial Diamonds; Dia- mond Dust; Rouge.

5355 Knobs and Pointers Includes Knobs, including Calibrated Knobs; Dials, Scale.

5360 Coil, Flat, Leaf, and Wire Springs Note-All springs, including specially designed, will be classified in this FSC. A spring is an elastic mechanical device that regains its original shape after being compressed, extended or deflected. Includes Compression Springs; Torsion Springs; Leaf Spring Assemblies; Flat Springs; Extension Springs.

5365 Bushings, Rings, Shims, and Spacers Note-All items, including specially de- signed, will be classified in this FSC. a. A bushing is cylindrical in shape, hollow, and designed primarily to be inserted into a hole to reduce the effective inside diam- eter of the hole, and to protect the body structure about the hole from damage resulting from stress, strain, and vibra- tion. b. A ring is cylindrical in shape, usu- ally flat with a center hole. Rings are multi-applicational. See specific item name for designated usage. c. A shim is a thin, sometimes tapered, piece of mate- rial used to fill in space between things. See specific item name for dimensional parameters. d. A spacer is a device for holding two members at a given distance from each other. Includes Externally Threaded Rings; Keyed and Serrated Lock Rings; Dee Rings; Instrument Retaining Rings; Shim Sets and Assortments; Plate Spacers; Ring Spacers; Sleeve Spacers; Stepped Spacers; Spacer Sets and Assortments; Sleeve Bushings; Machine Threaded Bushings; Machine Threaded Plugs. Excludes Sleeve Bearings (FSC 3120); Pipe Threaded Plugs (FSC 4730); Piston Rings (FSC 2520,







4310, and

4820); Re- taining Rings (FSC 5325); Shim Stock (FSC 9515).