The Washer,flat, cataloged under National Stock Number 5310-01-682-1267, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 10 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 | 5310-01-682-1267 |
| Primary Part Number | 90377A131 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MANUFACTURE REFERENCE MFR REF ALL TREATMENT RESPONSES OVERALL |
| Overall Diameter | 0.875 INCHES NOMINAL IN |
| Material Document and Classification | MANUFACTURE REFERENCE MFR REF ALL MATERIAL RESPONSES OVERALL |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.266 INCHES NOMINAL IN |
| Thickness | 0.050 INCHES MINIMUM AND 0.080 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 |
|---|---|
| 90377A131 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-682-1267 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-682-1267 has 1 manufacturer part number on file: 90377A131 (Mcmaster-Carr Supply Co).
Key specifications for 90377A131: Surface Treatment Document and Classification: MANUFACTURE REFERENCE MFR REF ALL TREATMENT RESPONSES OVERALL; Overall Diameter: 0.875 INCHES NOMINAL IN; Material Document and Classification: MANUFACTURE REFERENCE MFR REF ALL MATERIAL RESPONSES OVERALL; Color: BLACK OVERALL. 10 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.