The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-00-279-4451, 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 17 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-279-4451 |
| Primary Part Number | H49661-7 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.491 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 76301-ST3-468 MANUFACTURERS STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Ball Seat Radius | 0.496 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | SINGLE BALL SEAT, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 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 |
|---|---|
| H49661-7 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| TLN123CD3-7N | Reid Products Inc. Dba Reid Products Inc (USA) |
| TLN123CD3-7N | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M468C7M | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| TLN1023CD3-7N | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| TLN1023CD3-7N | 5/9 Secondary reference U.S. Government activity |
| TLN1023CD3-7N | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| TLN1023CD3-7N | 5/9 Secondary reference U.S. Government activity |
| TLN1023CD3-7N | 5/2 Secondary reference U.S. Government activity |
| 10121252 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TLN1023CD3-7N | 3/9 Design control — primary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| TLN1023CD3-7N | 5/9 Secondary reference Huck International, Inc |
NSN 5310-00-279-4451 is a Nut,self-Locking,single Ball Sea, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-279-4451 has 4 manufacturer part numbers on file: H49661-7 (Howmet Global Fastening Systems Inc), TLN123CD3-7N (Reid Products Inc. Dba Reid Products Inc), TLN123CD3-7N (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M468C7M (The Boeing Company Div Defense).
Key specifications for H49661-7: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.491 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 17 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.