The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-173-7874, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 23 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-173-7874 |
| Primary Part Number | 3M943T4-1-9 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | The Boeing Company Div Defense |
| 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 |
| Surface Finish | 125.0 MICROINCHES OUTSIDE DIAMETER |
| First End Location | THREADED END |
| Hole Arrangement Style | ONE END DRILLED |
| Thread Length | 0.250 INCHES NOMINAL IN |
| First End Style | SQUARE |
| First Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Shank Length | 0.467 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | MIL-T-9047,TYPE 3,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Second End Taper Length | 0.250 INCHES MINIMUM AND 0.270 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 | 0.812 INCHES NOMINAL IN |
| Shoulder Width Across Flats | 0.438 INCHES NOMINAL IN |
| Second End Tip Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Second End Style | CHAMFERED |
| Thread Class | 3A A |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Centerline of Hole to End of Pin | 0.140 INCHES NOMINAL IN |
| 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 |
|---|---|
| 3M943T4-1-9 | Hi-Shear Corporation (USA) |
| 3M943T4-1-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M943T4-1-9 | West Coast Aerospace, Inc. (USA) |
| 3M943T4-1-9 | Saturn Fasteners Inc (USA) |
| 3M943T4-1-9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M943T4-1-9 | Houston Precision Fasteners I Lp (USA) |
| 3M943T4-1-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M943T4-1-9 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M943T4-1-9 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M943T4-1-9 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M943T4-1-9 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M943T4-1-9 | G.s. Precision, Inc. (USA) |
| 3M943T4-1-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943T4-1-9 | Howmet Global Fastening Systems Inc (USA) |
| 3M943T4-1-9 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M943T4-1-9 | Heartland Precision Fasteners Inc (USA) |
| 11415T4-1-9 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| D792683T1N9 | 5/9 Secondary reference U.S. Government activity |
| VS3258T4-1-9 | 5/2 Secondary reference U.S. Government activity |
| 3M943T4-1-9 | 5/2 Secondary reference U.S. Government activity |
| D792683T1N9 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| AAP139T4-1-9 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-01-173-7874 is a Pin,shoulder,headless, manufactured by The Boeing Company Div Defense, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-173-7874 has 17 manufacturer part numbers on file: 3M943T4-1-9 (Hi-Shear Corporation), 3M943T4-1-9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M943T4-1-9 (West Coast Aerospace, Inc.), 3M943T4-1-9 (Saturn Fasteners Inc), 3M943T4-1-9 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 12 more.
Key specifications for 3M943T4-1-9: 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; Surface Finish: 125.0 MICROINCHES OUTSIDE DIAMETER; First End Location: THREADED END. 23 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.