The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-481-9427, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 20 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-481-9427 |
| Primary Part Number | 3M943C4-2-5 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Shank Diameter | 0.249 INCHES NOMINAL IN |
| Second Shank Diameter | 0.249 INCHES NOMINAL IN |
| First End Location | THREADED END |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | SQUARE |
| Shank Length | 0.530 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | QQ-S-763 COND B FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 COND B FED SPEC 2ND MATERIAL RESPONSE OR MMS265 COND B FSCM 76301 MFR REF 3RD MATERIAL RESPONSE OVERALL |
| Second End Taper Length | 0.250 INCHES NOMINAL IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Second Shank Length | 0.562 INCHES MINIMUM AND 0.582 INCHES MAXIMUM IN |
| Shoulder Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Second End Tip Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Second End Style | CHAMFERED |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303SE 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 |
|---|---|
| 3M943C4-2-5 | Houston Precision Fasteners I Lp (USA) |
| VS3258C4-2-5 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M943C4-2-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943C4-2-5 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M943C4-2-5 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| D792683C2N5 PRIMARY | Huck International, Inc (USA) |
| 3M943C4-2-5 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11415C4-2-5 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M943C4-2-5 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M943C4-2-5 PRIMARY | Hi-Shear Corporation (USA) |
| 3M943C4-2-5 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VS3258C4-2-5 | Howmet Global Fastening Systems Inc (USA) |
| 3M943C4-2-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC943C4-2-5 | West Coast Aerospace, Inc. (USA) |
| 3M943C4-2-5 | Boeing Distribution Services X, Inc. (USA) |
| 3M943C4-2-5 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M943C4-2-5 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M943C4-2-5 | G.s. Precision, Inc. (USA) |
| 3M943C4-2-5 PRIMARY | Saturn Fasteners Inc (USA) |
| 3M943C4-2-5 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| D792683C2N5 | 5/9 Secondary reference U.S. Government activity |
| 3M943C4-2-5 | 3/2 Design control — primary reference U.S. Government activity |
| AAP139C4-2-5 | 5/2 Secondary reference U.S. Government activity |
| 3M943C4-2-5 | 5/9 Secondary reference Sps Technologies Inc |
| VS3258C4-2-5 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-01-481-9427 is a Pin,shoulder,headless, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-481-9427 has 20 manufacturer part numbers on file: 3M943C4-2-5 (Houston Precision Fasteners I Lp), VS3258C4-2-5 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), 3M943C4-2-5 (Sps Technologies, Llc Dba PB Fasteners), 3M943C4-2-5 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M943C4-2-5 (Sps Technologies Ltd, Tj Brooks Division) and 15 more.
Key specifications for 3M943C4-2-5: Shank Diameter: 0.249 INCHES NOMINAL IN; Second Shank Diameter: 0.249 INCHES NOMINAL IN; First End Location: THREADED END; Thread Length: 0.405 INCHES NOMINAL IN. 20 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.