The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-00-451-0136, 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 15 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-451-0136 |
| Primary Part Number | 3M347L4 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Width Across Flats | 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-624-CANCELED FED SPEC 2ND MATERIAL RESPONSE OR AMS 6300 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.225 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| Ball Seat Radius | 0.300 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SINGLE BALL SEAT, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OR STEEL OR STEEL COMP 4037 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 |
|---|---|
| 3M347L4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M347L4 | Huck International, Inc (USA) |
| TLN1020L4N | Howmet Global Fastening Systems Inc (USA) |
| 3M347L4 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M347L4 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M347L4 | Howmet Global Fastening Systems Inc (USA) |
| TLN1020L4N | Reid Products Inc. Dba Reid Products Inc (USA) |
| TLN1020L4N | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| TLN1020L4N | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 82674N-428C | 3/9 Design control — primary reference Sps Technologies, Llc Dba PB Fasteners |
| TLN1020L4N | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| TLN1020L4N | 5/9 Secondary reference U.S. Government activity |
| 52LH6073A048 | 5/9 Secondary reference Harvard Industries Inc |
| TLN1020L4N | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| 3M347L4 | 5/2 Secondary reference U.S. Government activity |
| TLN1020L4N | 5/9 Secondary reference U.S. Government activity |
| 3M347L4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5310-00-451-0136 is a Nut,self-Locking,single Ball Sea, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-451-0136 has 8 manufacturer part numbers on file: 3M347L4 (Sps Technologies, Llc Dba PB Fasteners), 3M347L4 (Huck International, Inc), TLN1020L4N (Howmet Global Fastening Systems Inc), 3M347L4 (Reid Products Inc. Dba Reid Products Inc), 3M347L4 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 3 more.
Key specifications for 3M347L4: Lubrication: SOLUBLE LUBRICANT; Width Across Flats: 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 15 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.