The Washer,lock, cataloged under National Stock Number 5310-01-344-5946, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-344-5946 |
| Primary Part Number | 122078A |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Supplementary Features | EQUIV METRIC SIZE M16 |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | SAE GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.075 INCHES NOMINAL IN |
| Material Thickness | 0.138 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.638 INCHES MINIMUM AND 0.665 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 |
|---|---|
| 122078A PRIMARY | Oshkosh Defense Llc (USA) |
| DIN127M16ZP | Schlafer Supply Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 122078A | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-344-5946 is a Washer,lock, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-344-5946 has 2 manufacturer part numbers on file: 122078A (Oshkosh Defense Llc), DIN127M16ZP (Schlafer Supply Co Inc).
Key specifications for 122078A: Supplementary Features: EQUIV METRIC SIZE M16; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: SAE GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.075 INCHES NOMINAL IN. 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.