The Washer,flat, cataloged under National Stock Number 5310-00-587-1441, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 9 specifications, 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. 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 | 5310-00-587-1441 |
| Primary Part Number | 7760071 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Overall Diameter | 1.870 INCHES MINIMUM AND 1.890 INCHES MAXIMUM IN |
| Heat Treatment | QUENCHED AND TEMPERED |
| Hardness Rating | 42.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A682 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.650 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN |
| Thickness | 0.150 INCHES MINIMUM AND 0.170 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 |
NSN 5310-00-587-1441 is a Washer,flat, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-587-1441 has 2 manufacturer part numbers on file: 7760071 (U S Army Tank Automotive Command Amsta-Im-Mm), 913442 (General Motors Corp).
1 possible match (shared part number, not a government interchangeability claim): 5970-01-020-3418. Verify interchangeability with system specifications before substitution.
Key specifications for 7760071: Overall Diameter: 1.870 INCHES MINIMUM AND 1.890 INCHES MAXIMUM IN; Heat Treatment: QUENCHED AND TEMPERED; Hardness Rating: 42.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM; Material Document and Classification: ASTM A682 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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.