The PSC Code 5310 covers a broad range of nuts and washers used in federal government contracting. This category includes various types of nuts such as locknuts, eye nuts, plain nuts, castellated nuts, wing nuts, plate nuts, and push-on nuts, as well as washers including concave, convex, flat, keyed, lock, shouldered, and split washers. These components are essential mechanical fastening elements used to secure parts together, distribute load, and prevent loosening or movement in assemblies. Government agencies rely on this PSC to procure reliable and standardized nuts and washers for maintenance, repair, and construction projects across multiple sectors including defense, infrastructure, and logistics.

Includes for PSC 5310

This PSC code covers the following products and services:

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 for PSC 5310

This PSC code does NOT cover the following:

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

Additional Notes for PSC 5310

Important notes and guidance for using this PSC code:

Nuts and washers, including specially 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 distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.

Typical Buyers & Agencies for PSC 5310

Typical buyers under PSC 5310 include defense agencies such as the Department of Defense (DoD), the General Services Administration (GSA), and various branches of the military. These agencies require nuts and washers for vehicle maintenance, weapons systems, aircraft, and infrastructure projects. Additionally, civilian agencies involved in public works, transportation, and facility management also procure under this PSC to support equipment assembly and maintenance. The wide applicability of these components makes this PSC essential for any agency involved in construction, repair, or manufacturing activities.

Common Contract Types for PSC 5310

Contracts under PSC 5310 often include fixed-price and indefinite delivery/indefinite quantity (IDIQ) contracts, reflecting the routine and ongoing demand for nuts and washers. Procurement methods may include competitive bidding, simplified acquisition procedures, and blanket purchase agreements (BPAs) to ensure timely supply. These contracts typically support maintenance and repair operations, stock replenishment, and large-scale infrastructure projects, with contract values ranging from small orders to large multi-year supply agreements depending on agency needs.

Plain-Language Breakdown for PSC 5310

Covers a wide variety of nuts and washers essential for mechanical fastening in government projects.
Primarily purchased by defense agencies, GSA, and civilian public works departments.
Common contract types include fixed-price and IDIQ to support routine and large-scale procurements.
Procurement methods range from competitive bids to blanket purchase agreements for efficiency.
Often linked with NAICS codes related to metal manufacturing and industrial supply distribution.
Excludes bearing thrust washers, shims, ring spacers, plate spacers, and lock rings classified elsewhere.

Related Categories for PSC 5310

Other categories at the same level as 5310

5305 SCREWS

Screws

5306 BOLTS

Bolts

5307 STUDS

Studs

5315 NAILS, MACHINE KEYS, AND PINS

Nails, Machine Keys, and Pins

5320 RIVETS

Rivets

5325 FASTENING DEVICES

Fastening Devices

5330 PACKING AND GASKET MATERIALS

Packing and Gasket Materials

5331 O-RING

O-Ring

5335 METAL SCREENING

Metal Screening

5340 HARDWARE, COMMERCIAL

Hardware

5342 HARDWARE, WEAPON SYSTEM

Hardware, Weapon System

5345 DISKS AND STONES, ABRASIVE

Disks and Stones, Abrasive

5350 ABRASIVE MATERIALS

Abrasive Materials

5355 KNOBS AND POINTERS

Knobs and Pointers

5360 COIL, FLAT, LEAF, AND WIRE SPRINGS

Coil, Flat, Leaf, and Wire Springs

5365 BUSHINGS, RINGS, SHIMS, AND SPACERS

Bushings, Rings, Shims and Spacers

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