The Washer,spring Tension, cataloged under National Stock Number 5310-01-148-9781, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-148-9781 |
| Primary Part Number | 1213AS600-1 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-81562,CL 2,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM |
| Style Designator | SPRING TENSION |
| Material Document and Classification | MIL-S-18731 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.976 INCHES MINIMUM AND 0.984 INCHES MAXIMUM IN |
| Material Thickness | 0.057 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL COMP 6150 OVERALL |
| Hole Diameter | 0.480 INCHES MINIMUM AND 0.487 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 |
|---|---|
| 1213AS600-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| AM251215 | Matthew Warren, Inc. Div Maryland Precision Spring (USA) |
| Reference | Meaning |
|---|---|
| AM251215 | 5/9 Secondary reference Rolex Company Dba Rolex Company Div Rolex Company |
NSN 5310-01-148-9781 is a Washer,spring Tension, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-148-9781 has 2 manufacturer part numbers on file: 1213AS600-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), AM251215 (Matthew Warren, Inc. Div Maryland Precision Spring).
Key specifications for 1213AS600-1: Overall Height: 0.079 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-81562,CL 2,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM; Style Designator: SPRING TENSION. 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.