The Washer,flat, cataloged under National Stock Number 5310-01-149-0870, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Am General Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-149-0870 |
| Primary Part Number | 5740137 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Overall Diameter | 48.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1050 OVERALL |
| Center Hole Shape Style | ROUND |
| Thickness | 6.0 MILLIMETERS MINIMUM AND 6.5 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 5740137 PRIMARY | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 14022648 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 14022648 | 5/9 Secondary reference General Motors Llc Dba General Motors Llc |
| 5310PL0874778 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-01-149-0870 is a Washer,flat, manufactured by Am General Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-149-0870 has 1 manufacturer part number on file: 5740137 (Am General Llc).
Key specifications for 5740137: Overall Diameter: 48.0 MILLIMETERS NOMINAL MM; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.