The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-662-3974, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Therma-Tech Engineering Inc Dba Thermatech Ar Lintern. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-662-3974 |
| Primary Part Number | 017020320 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Therma-Tech Engineering Inc Dba Thermatech Ar Lintern |
| Status | ACTIVE |
| Washer Outside Diameter | 0.50 INCHES NOMINAL IN |
| Width Across Flats | 0.44 INCHES NOMINAL IN |
| Thread Series | UNF |
| Washer Thickness | 0.03 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.25 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 017020320 PRIMARY | Therma-Tech Engineering Inc Dba Thermatech Ar Lintern (USA) |
| Reference | Meaning |
|---|---|
| 4290153 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 5310-01-662-3974 is a Nut,self-Locking,extended Washer, manufactured by Therma-Tech Engineering Inc Dba Thermatech Ar Lintern, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-662-3974 has 1 manufacturer part number on file: 017020320 (Therma-Tech Engineering Inc Dba Thermatech Ar Lintern).
Key specifications for 017020320: Overall Height: 0.22 INCHES NOMINAL IN; Washer Outside Diameter: 0.50 INCHES NOMINAL IN; Width Across Flats: 0.44 INCHES NOMINAL IN; Thread Series: UNF. 11 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.