The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-00-124-2120, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-124-2120 |
| Primary Part Number | 3M347L8 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.563 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) |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Ball Seat Radius | 0.561 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SINGLE BALL SEAT, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| TLN1020L8N | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TLN1020L8N | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TLN1020L8N | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TLN1020L8N | Huck International, Inc (USA) |
| 3M347L8 PRIMARY | The Boeing Company Div Defense (USA) |
| TLN1020L8N | Reid Products Inc. Dba Reid Products Inc (USA) |
| TLN1020L8N | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| Reference | Meaning |
|---|---|
| TLN1020L8N | 5/9 Secondary reference U.S. Government activity |
| TLN1020L8N | 5/2 Secondary reference U.S. Government activity |
| TLN1020L8N | 5/2 Secondary reference U.S. Government activity |
| 52LH6073A080 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-124-2120 is a Nut,self-Locking,single Ball Sea, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-124-2120 has 7 manufacturer part numbers on file: TLN1020L8N (Sps Technologies, Llc Dba PB Fasteners), TLN1020L8N (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TLN1020L8N (Fairchild Fasteners Europe - Vsd Gmbh), TLN1020L8N (Huck International, Inc), 3M347L8 (The Boeing Company Div Defense) and 2 more.
Key specifications for 3M347L8: Lubrication: SOLUBLE LUBRICANT; Width Across Flats: 0.553 INCHES MINIMUM AND 0.563 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.