The Washer,spring Tension, cataloged under National Stock Number 5310-01-054-2575, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-054-2575 |
| Primary Part Number | SP135A |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Hardness Rating | 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM |
| Material Document and Classification | BS 2870,FSCM K0195 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.245 INCHES MINIMUM AND 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN |
| Material Thickness | 0.006 INCHES NOMINAL0.006 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | BERYLLIUM OVERALL |
| Hole Diameter | 0.125 INCHES MINIMUM AND 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 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 |
|---|---|
| SP135A PRIMARY | Bsi Standards Limited (GBR) |
NSN 5310-01-054-2575 is a Washer,spring Tension, manufactured by Bsi Standards Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-054-2575 has 1 manufacturer part number on file: SP135A (Bsi Standards Limited).
Key specifications for SP135A: Overall Height: 0.018 INCHES MINIMUM AND 0.018 INCHES MINIMUM AND 0.024 INCHES MAXIMUM0.024 INCHES MAXIMUM IN; Hardness Rating: 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM; Material Document and Classification: BS 2870,FSCM K0195 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.245 INCHES MINIMUM AND 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN. 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.