The Washer,flat, cataloged under National Stock Number 5310-00-528-1450, 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 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-528-1450 |
| Primary Part Number | 5281450 |
| 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 | 0.870 INCHES MINIMUM AND 0.874 INCHES MAXIMUM IN |
| Hardness Rating | 22.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.518 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN |
| Thickness | 0.0590 INCHES MINIMUM AND 0.0660 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 |
|---|---|
| 5281450 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 838472 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 838472 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 838472 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 838472 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
NSN 5310-00-528-1450 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 5310-00-528-1450 has 3 manufacturer part numbers on file: 5281450 (U S Army Tank Automotive Command Amsta-Im-Mm), 838472 (General Motors Llc Dba General Motors Llc), 838472 (General Motors Corp).
1 possible match (shared part number, not a government interchangeability claim): 4330-01-200-7695. Verify interchangeability with system specifications before substitution.
Key specifications for 5281450: Overall Diameter: 0.870 INCHES MINIMUM AND 0.874 INCHES MAXIMUM IN; Hardness Rating: 22.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; 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.