The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-371-8419, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-371-8419 |
| Primary Part Number | 12418084 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Washer Outside Diameter | 38.6 MILLIMETERS NOMINAL MM |
| Width Across Flats | 26.4 MILLIMETERS MINIMUM AND 27.6 MILLIMETERS MAXIMUM MM |
| Thread Tolerance Class | 6H INTERNAL |
| Thread Series | M |
| Thread Pitch in Millimeters | 1.50 |
| Washer Thickness | 2.7 MILLIMETERS MINIMUM AND 3.2 MILLIMETERS MAXIMUM MM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 18.0 MILLIMETERS MM |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | ZINC OVERALL |
| Nut Style | HEXAGON |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 12418084 | Oshkosh Defense Llc (USA) |
| 12418084 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 12418084 | Amz Alabama Inc. (USA) |
| 12418084 | Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA) |
| Reference | Meaning |
|---|---|
| 5310013718419 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 12418084 | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-371-8419 is a Nut,self-Locking,extended Washer, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-371-8419 has 4 manufacturer part numbers on file: 12418084 (Oshkosh Defense Llc), 12418084 (U S Army Tank Automotive Command Amsta-Im-Mm), 12418084 (Amz Alabama Inc.), 12418084 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc).
Key specifications for 12418084: Overall Height: 20.4 MILLIMETERS MINIMUM AND 20.5 MILLIMETERS MAXIMUM MM; Washer Outside Diameter: 38.6 MILLIMETERS NOMINAL MM; Width Across Flats: 26.4 MILLIMETERS MINIMUM AND 27.6 MILLIMETERS MAXIMUM MM; Thread Tolerance Class: 6H INTERNAL. 12 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.