The Washer,spring Tension, cataloged under National Stock Number 5310-01-312-0251, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Barnes Group Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-312-0251 |
| Primary Part Number | B0343-016-EN |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Barnes Group Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-26074,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPRING TENSION |
| Material Document and Classification | MIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.343 INCHES MAXIMUM IN |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Surface Treatment | NICKEL OVERALL |
| Material | STEEL COMP 1095 OVERALL |
| Hole Diameter | 0.164 INCHES MINIMUM 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 |
|---|---|
| B0343-016-EN PRIMARY | Barnes Group Inc (USA) |
| 947B872-6 PRIMARY | Barnes Group Inc (USA) |
| Reference | Meaning |
|---|---|
| 947B872-6 | C/1 Advisory reference — outside the item-of-supply concept Quality Perforating Inc. |
| 947B872-6 | 7/2 Vendor item drawing reference U.S. Government activity |
| 947B872-6 | 5/9 Secondary reference Itw Shakeproof Automotive Products |
| 947B872-6 | 5/9 Secondary reference National-Standard Co Perforated Metals Plant |
| 947B872-6 | 5/9 Secondary reference U.S. Government activity |
| 947B872-6 | C/1 Advisory reference — outside the item-of-supply concept Matthew Warren, Inc. Div Maryland Precision Spring |
| 947B872-6 | 5/9 Secondary reference Rolex Company Dba Rolex Company Div Rolex Company |
NSN 5310-01-312-0251 is a Washer,spring Tension, manufactured by Barnes Group Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-312-0251 has 2 manufacturer part numbers on file: B0343-016-EN (Barnes Group Inc), 947B872-6 (Barnes Group Inc).
Key specifications for B0343-016-EN: Overall Height: 0.026 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-P-26074,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPRING TENSION; Material Document and Classification: MIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 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.