The Washer,flat, cataloged under National Stock Number 5310-00-987-2816, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Corp Electronic Systems Defensive System Div. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-987-2816 |
| Primary Part Number | 61301-3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Corp Electronic Systems Defensive System Div |
| Status | ACTIVE |
| Overall Diameter | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Heat Treatment | ANNEALED |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Thickness | 0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM 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 |
|---|---|
| 61301-3 PRIMARY | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
NSN 5310-00-987-2816 is a Washer,flat, manufactured by Northrop Grumman Corp Electronic Systems Defensive System Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-987-2816 has 1 manufacturer part number on file: 61301-3 (Northrop Grumman Corp Electronic Systems Defensive System Div).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-626-6515. Verify interchangeability with system specifications before substitution.
Key specifications for 61301-3: Overall Diameter: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Heat Treatment: ANNEALED; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 6 specifications are 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.