The Nut,self-Locking,spline, cataloged under National Stock Number 5310-01-176-2007, 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 12 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-176-2007 |
| Primary Part Number | 9977M25P01 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | GEN.ELEC.-50TF7 CL-H WIH EXCEPTIONS INDICATED ON DRAWING NO.9977-25 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Diameter | 0.560 INCHES NOMINAL IN |
| Pilot Diameter | 0.610 INCHES NOMINAL IN |
| Pilot Length | 0.085 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.505 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Nut Style | SPLINE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| 9977M25P01 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 9977M25P01 | General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp (USA) |
| 9977M25P01 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| H51161-6 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 9977M25P01 PRIMARY | Bristol Industries, Llc (USA) |
| 9977M25P01 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| LH12281-6 | 5/9 Secondary reference Harvard Industries Inc |
| VN1879-WX-064 | 3/2 Design control — primary reference U.S. Government activity |
| 9977M25P03 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 9977M2SP02 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 9977M25P04 | 5/9 Secondary reference General Electric Company |
| 9977M25P01 | 5/9 Secondary reference Science Applications Intl Corp Engineering and Software Science Group |
NSN 5310-01-176-2007 is a Nut,self-Locking,spline, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-176-2007 has 6 manufacturer part numbers on file: 9977M25P01 (Howmet Global Fastening Systems Inc), 9977M25P01 (General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp), 9977M25P01 (Sps Technologies, Llc Dba PB Fasteners), H51161-6 (Howmet Global Fastening Systems Inc), 9977M25P01 (Bristol Industries, Llc) and 1 more.
Key specifications for 9977M25P01: Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: GEN.ELEC.-50TF7 CL-H WIH EXCEPTIONS INDICATED ON DRAWING NO.9977-25 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.375 INCHES IN. 12 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.