The Washer,flat, cataloged under National Stock Number 5310-01-013-8323, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 11 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 | 5310-01-013-8323 |
| Primary Part Number | 272-4900485 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Center Hole Width | 0.374 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Center Hole Length | 0.374 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL B FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.875 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-636-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | RECTANGULAR |
| Thickness | 0.063 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 |
|---|---|
| 272-4900485 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
NSN 5310-01-013-8323 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-013-8323 has 1 manufacturer part number on file: 272-4900485 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 272-4900485: Center Hole Width: 0.374 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN; Center Hole Length: 0.374 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL B FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.875 INCHES NOMINAL IN. 11 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.