The Washer,flat, cataloged under National Stock Number 5310-01-339-6989, 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 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-339-6989 |
| Primary Part Number | 61303-11650 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Corp Electronic Systems Defensive System Div |
| Status | ACTIVE |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 302 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN |
| Thickness | 0.011 INCHES MINIMUM AND 0.021 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 |
|---|---|
| 61303-11650 PRIMARY | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
NSN 5310-01-339-6989 is a Washer,flat, manufactured by Northrop Grumman Corp Electronic Systems Defensive System Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-339-6989 has 1 manufacturer part number on file: 61303-11650 (Northrop Grumman Corp Electronic Systems Defensive System Div).
Key specifications for 61303-11650: Overall Diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 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.