The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-348-2038, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts. Government technical data includes 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-348-2038 |
| Primary Part Number | THCR-357 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Washer Outside Diameter | 0.645 INCHES MAXIMUM IN |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.025 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.437 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| THCR-357 | Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts (USA) |
| Reference | Meaning |
|---|---|
| TE-9868-7 | 5/9 Secondary reference Harvard Industries Inc |
| 5310PL1017664 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS14145-7 | 5/9 Secondary reference U.S. Government activity |
| MS14145-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-348-2038 is a Nut,self-Locking,extended Washer, manufactured by Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-348-2038 has 1 manufacturer part number on file: THCR-357 (Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts).
Key specifications for THCR-357: Lubrication: SOLUBLE LUBRICANT; Overall Height: 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN; Washer Outside Diameter: 0.645 INCHES MAXIMUM IN; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN. 15 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.