The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-291-4576, 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 21 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5315-01-291-4576 |
| Primary Part Number | 3M943C4B2-2 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Huck International, Inc |
| 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 |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | SQUARE |
| Shank Length | 0.245 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | QQ-S-763 COND B FED SPEC 1ST MATERIAL RESPONSE OR MMS265 CAGEC 76301 MFR REF 3RD MATERIAL RESPONSE OVERALL |
| Second End Taper Length | 0.100 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Second Shank Length | 0.530 INCHES NOMINAL 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 |
|---|---|
| 3M943C4B2-2 | G.s. Precision, Inc. (USA) |
| 3M943C4B2-2 PRIMARY | Huck International, Inc (USA) |
| 11415C4B2-2 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M943C4B2-2 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M943C4B2-2 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M943C4B2-2 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M943C4B2-2 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943C4B2-2 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| D792684BC2N2 | 5/9 Secondary reference U.S. Government activity |
| AAP139C4B202 | 5/2 Secondary reference U.S. Government activity |
| D792684BC2N2 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 3M943C4B2-2 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M943C4B2-2 | 5/9 Secondary reference Sps Technologies Inc |
| D79264BC2N2 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| VS3258C4B2-2 | 5/2 Secondary reference U.S. Government activity |
| AAP139C4B2-2 | 5/2 Secondary reference U.S. Government activity |
| 10123264 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5315-01-291-4576 is a Pin,shoulder,headless, manufactured by Huck International, Inc, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-291-4576 has 8 manufacturer part numbers on file: 3M943C4B2-2 (G.s. Precision, Inc.), 3M943C4B2-2 (Huck International, Inc), 11415C4B2-2 (Reid Products Inc. Dba Reid Products Inc), 3M943C4B2-2 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M943C4B2-2 (Sps Technologies Ltd, Tj Brooks Division) and 3 more.
Key specifications for 3M943C4B2-2: 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; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.