The Washer,spring Tension, cataloged under National Stock Number 5310-01-251-3401, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Centofanti Marine Service Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Centofanti Marine Service Inc (CAGE 0A0L9) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-251-3401 |
| Primary Part Number | B502-031 ITEM 5 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Centofanti Marine Service Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| B502-031 ITEM 5 PRIMARY | Centofanti Marine Service Inc (USA) |
| Reference | Meaning |
|---|---|
| B502-031 ITEM 5 | 5/9 Secondary reference U.S. Government activity |
| F023-147 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-251-3401 is a Washer,spring Tension, manufactured by Centofanti Marine Service Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-251-3401 has 1 manufacturer part number on file: B502-031 ITEM 5 (Centofanti Marine Service Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-313-5036. Verify interchangeability with system specifications before substitution.
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.