The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-376-1046, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 17 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5315-01-376-1046 |
| Primary Part Number | 3M943C4-3-12 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| First End Location | THREADED END |
| Second End Taper Angle | 45.0 DEGREES NOMINAL |
| Thread Length | 0.4050 INCHES NOMINAL IN |
| First End Style | CHAMFERED |
| Shank Length | 0.5925 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | MIL-T-9047,TY 3,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Second End Taper Length | 0.2480 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN |
| First End Taper Angle | 45.0 DEGREES NOMINAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.2500 INCHES IN |
| Shoulder Diameter | 0.4380 INCHES NOMINAL IN |
| Second Shank Length | 1.0000 INCHES NOMINAL IN |
| Second End Tip Radius | 0.0600 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM IN |
| Second End Style | CHAMFERED |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 3M943C4-3-12 | Heartland Precision Fasteners Inc (USA) |
| 3M934C4-3-12 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M934C4-3-12 | West Coast Aerospace, Inc. (USA) |
| 3M943C4-3-12 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M934C4-3-12 | Howmet Global Fastening Systems Inc (USA) |
| 3M943C4-3-12 PRIMARY | Hi-Shear Corporation (USA) |
| 3M943C4-3-12 | Houston Precision Fasteners I Lp (USA) |
| 3M934C4-3-12 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M934C4-3-12 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M943C4-3-12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M943C4-3-12 PRIMARY | G.s. Precision, Inc. (USA) |
| 3M934C4-3-12 | Saturn Fasteners Inc (USA) |
| 3M943C4-3-12 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943C4-3-12 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M934C4-3-12 | Huck International, Inc (USA) |
| 3M934C4-3-12 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M934C4-3-12 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M934C4-3-12 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3258C4-3-12 | 5/9 Secondary reference U.S. Government activity |
| AAP139C4-3-12 | 5/9 Secondary reference U.S. Government activity |
| 3M934C4-3-12 | 5/2 Secondary reference U.S. Government activity |
| 11415C4-3-12 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| 3M934C4-3-12 | 5/2 Secondary reference U.S. Government activity |
| D7926834-3N12 | 5/9 Secondary reference Deutsch Co the |
| 3M934C4-3-12 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-01-376-1046 is a Pin,shoulder,headless, manufactured by Hi-Shear Corporation, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-376-1046 has 17 manufacturer part numbers on file: 3M943C4-3-12 (Heartland Precision Fasteners Inc), 3M934C4-3-12 (Fastener Innovation Technology, Inc. Dba F I T), 3M934C4-3-12 (West Coast Aerospace, Inc.), 3M943C4-3-12 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 3M934C4-3-12 (Howmet Global Fastening Systems Inc) and 12 more.
Key specifications for 3M943C4-3-12: Shank Diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN; Second Shank Diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN; First End Location: THREADED END; Second End Taper Angle: 45.0 DEGREES NOMINAL. 22 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.