The Washer,lock, cataloged under National Stock Number 5310-01-680-2490, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-680-2490 |
| Primary Part Number | 12601071-007 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM |
| Style Designator | SPLIT HELICAL-LEFT HAND |
| Outside Diameter | 24.1 MILLIMETERS NOMINAL MM |
| Material Thickness | 3.0 MILLIMETERS NOMINAL MM |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 14.2 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 12601071-007 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 12601071-007 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5310-01-680-2490 is a Washer,lock, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-680-2490 has 1 manufacturer part number on file: 12601071-007 (Oshkosh Defense Llc).
Key specifications for 12601071-007: Hardness Rating: 44.0 ROCKWELL C MINIMUM; Style Designator: SPLIT HELICAL-LEFT HAND; Outside Diameter: 24.1 MILLIMETERS NOMINAL MM; Material Thickness: 3.0 MILLIMETERS NOMINAL MM. 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.