The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-128-1646, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-128-1646 |
| Primary Part Number | 3M943C3-1-0 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Shank Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM IN |
| First End Location | THREADED END |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | SQUARE |
| Shank Length | 0.467 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 | 0.288 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Second Shank Length | 0.288 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN |
| Shoulder Width Across Flats | 0.438 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Second End Tip Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Second End Style | CHAMFERED |
| Thread Class | 3A A |
| 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 |
|---|---|
| 3M943C3-1-0 | Rovanco Piping Systems Inc. (USA) |
| 3M943C3-1-0 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M943C3-1-0 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M943C3-1-0 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M943C3-1-0 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M943C3-1-0 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943C3-1-0 | Houston Precision Fasteners I Lp (USA) |
| 3M943C3-1-0 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M943C3-1-0 | Saturn Fasteners Inc (USA) |
| 3M943C3-1-0 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M943C3-1-0 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M943C3-1-0 PRIMARY | Huck International, Inc (USA) |
| 3M943C3-1-0 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M943C3-1-0 | Howmet Global Fastening Systems Inc (USA) |
| 3M943C3-1-0 | Hi-Shear Corporation (USA) |
| 3M943C3-1-0 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| VS3258C3-1-0 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| 10122976 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| D792681C1N0 | 5/9 Secondary reference Huck International, Inc |
| AAP139C3-1-0 | 5/9 Secondary reference U.S. Government activity |
| 3M943C3-1-0 | 5/2 Secondary reference U.S. Government activity |
| 3M943C3-1-0 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M943C3-1-0 | 5/2 Secondary reference U.S. Government activity |
| 11415C3-1-0 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| 3M943C3-1-0 | 5/9 Secondary reference G.s. Precision, Inc. |
| D792681C1N0 | 5/9 Secondary reference U.S. Government activity |
| ST3M712C3-1-0 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M943C3-1-0 | 5/9 Secondary reference U.S. Government activity |
NSN 5315-01-128-1646 is a Pin,shoulder,headless, manufactured by Huck International, Inc, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-128-1646 has 16 manufacturer part numbers on file: 3M943C3-1-0 (Rovanco Piping Systems Inc.), 3M943C3-1-0 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 3M943C3-1-0 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M943C3-1-0 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M943C3-1-0 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products) and 11 more.
Key specifications for 3M943C3-1-0: Shank Diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN; Second Shank Diameter: 0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM 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.