The Washer,flat, cataloged under National Stock Number 5310-01-685-2634, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Motor City Fasteners Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-685-2634 |
| Primary Part Number | 31NSFW8LM |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Motor City Fasteners Inc |
| Status | ACTIVE |
| Overall Diameter | 0.3125 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 31NSFW8LM | Lockheed Martin Australia Pty Ltd (AUS) |
| 31NSFW8LM PRIMARY | Motor City Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| 31NSFW8LM | 7/2 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
| 31NSFW8LM | 5/9 Secondary reference Lockheed Martin Australia Electronic Systems Pty Ltd |
NSN 5310-01-685-2634 is a Washer,flat, manufactured by Motor City Fasteners Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-685-2634 has 2 manufacturer part numbers on file: 31NSFW8LM (Lockheed Martin Australia Pty Ltd), 31NSFW8LM (Motor City Fasteners Inc).
Key specifications for 31NSFW8LM: Overall Diameter: 0.3125 INCHES NOMINAL IN; Special Features: WASHER, FLAT, 5/16, NEXT HIGHER ASSEMBLY PLATEFORM/PALLET ASSEMBLY 77D616049G003, QUANTITY NEEDED 16; Part Name Assigned by Controlling Agency: WASHER, FLAT. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.