The Nut,self-Locking,spline, cataloged under National Stock Number 5310-01-051-0655, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-051-0655 |
| Primary Part Number | 77377-5 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| 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 NOMINAL DEGF |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nut Diameter | 0.605 INCHES MAXIMUM IN |
| Pilot Diameter | 0.344 INCHES NOMINAL IN |
| Pilot Length | 0.107 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.245 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SPLINE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| 77377-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MN23-5 | Hi-Shear Corporation (USA) |
| MN23-5 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| SP50324-5 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 5310PL0741363 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C7530-5 | 3/2 Design control — primary reference U.S. Government activity |
| LH11922-5 | 5/9 Secondary reference Harvard Industries Inc |
| 77377-5 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-051-0655 is a Nut,self-Locking,spline, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-051-0655 has 4 manufacturer part numbers on file: 77377-5 (Sps Technologies, Llc Dba PB Fasteners), MN23-5 (Hi-Shear Corporation), MN23-5 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), SP50324-5 (Howmet Global Fastening Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 9150-01-727-1512. Verify interchangeability with system specifications before substitution.
Key specifications for 77377-5: Lubrication: DRY FILM LUBRICANT; 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 NOMINAL DEGF. 18 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.