The Washer,spring Tension, cataloged under National Stock Number 5310-00-156-0641, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Avionics Specialties, Inc.. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-156-0641 |
| Primary Part Number | 956-053 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Avionics Specialties, Inc. |
| Status | ACTIVE |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | QQ-C-533,ALLOY 172,T 1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.212 INCHES NOMINAL IN |
| Material Thickness | 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 2.112 INCHES NOMINAL 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 |
|---|---|
| 956-053 PRIMARY | Avionics Specialties, Inc. (USA) |
NSN 5310-00-156-0641 is a Washer,spring Tension, manufactured by Avionics Specialties, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-156-0641 has 1 manufacturer part number on file: 956-053 (Avionics Specialties, Inc.).
Key specifications for 956-053: Overall Height: 0.105 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM; Material Document and Classification: QQ-C-533,ALLOY 172,T 1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.212 INCHES NOMINAL IN. 6 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.