The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-015-1697, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-015-1697 |
| Primary Part Number | H49999-6 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.600 INCHES NOMINAL IN |
| Width Across Flats | 0.437 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | -50TF7,GENERAL ELECTRIC CO,AIRCRAFT BUSINESS GROUP MFR REF SINGLE TREATMENT RESPONSE THREADS |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Washer Thickness | 0.210 INCHES MINIMUM IN |
| Material Document and Classification | AMS 5709 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER THREADS |
| Countersink Angle | 90.0 DEGREES NOMINAL NUT |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY 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 |
|---|---|
| H49999-6 | Satair A/s (DNK) |
| J634P06D | General Electric Company (USA) |
| H49999-6 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 75731-624 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VN1492W064 | 3/2 Design control — primary reference U.S. Government activity |
| 5310PL0784447 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| LH11768-6 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-015-1697 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-015-1697 has 4 manufacturer part numbers on file: H49999-6 (Satair A/s), J634P06D (General Electric Company), H49999-6 (Howmet Global Fastening Systems Inc), 75731-624 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for H49999-6: Overall Height: 0.505 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Washer Outside Diameter: 0.600 INCHES NOMINAL IN; Width Across Flats: 0.437 INCHES NOMINAL IN; Surface Treatment Document and Classification: -50TF7,GENERAL ELECTRIC CO,AIRCRAFT BUSINESS GROUP MFR REF SINGLE TREATMENT RESPONSE THREADS. 16 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.