The Washer,spring Tension, cataloged under National Stock Number 5310-01-481-7057, 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 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-481-7057 |
| Primary Part Number | 12446260 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM |
| Style Designator | SPRING TENSION |
| Material Document and Classification | AISI-1075 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.905 INCHES MINIMUM AND 4.925 INCHES MAXIMUM IN |
| Material Thickness | 0.068 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Material | STEEL COMP 1075 OVERALL |
| Hole Diameter | 2.405 INCHES MINIMUM AND 2.415 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 |
|---|---|
| 12446260 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12364251 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5310-01-481-7057 is a Washer,spring Tension, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-481-7057 has 1 manufacturer part number on file: 12446260 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12446260: Overall Height: 0.215 INCHES NOMINAL IN; Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM; Style Designator: SPRING TENSION; Material Document and Classification: AISI-1075 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 7 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.