The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-181-9717, 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 11 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-181-9717 |
| Primary Part Number | H51908-4 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Width Across Flats | 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.176 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| H51908-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 9526M74 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 9526M74P01 | 5/9 Secondary reference Esna, Llc |
| 9526M74P02 | 5/9 Secondary reference General Electric Company |
| 9526M74P01 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 9526M74P04 | 5/9 Secondary reference General Electric Company |
| 9526M74P02 | 5/9 Secondary reference U.S. Government activity |
| 9526M74P01 | 5/9 Secondary reference Harvard Industries Inc |
| VN1311DA048 | 5/9 Secondary reference U.S. Government activity |
| 9526M74P01 | 5/9 Secondary reference General Electric Company |
| 9526M74P01 | 5/9 Secondary reference Cfm International Inc Dba Cfm International |
| 9526M74P03 | 5/9 Secondary reference General Electric Company |
| 82149-428 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 9526M74P02 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5310-01-181-9717 is a Nut,plain,hexagon, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-181-9717 has 2 manufacturer part numbers on file: H51908-4 (Howmet Global Fastening Systems Inc), 9526M74 (General Electric Company).
Key specifications for H51908-4: Width Across Flats: 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 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.