The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-537-8173, 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 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-537-8173 |
| Primary Part Number | 3M943E4-4-14 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.249 INCHES NOMINAL IN |
| First End Location | THREADED END |
| Second End Taper Angle | 45.0 DEGREES NOMINAL |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | SQUARE |
| Shank Length | 0.770 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS5629 ASSN STD SINGLE 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 End Tip Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Second End Style | CHAMFERED |
| Thread Class | 3A A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNJEF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 3M943E4-4-14 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M943E4-4-14 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M943E4-4-14 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M943E4-4-14 | Saturn Fasteners Inc (USA) |
| 11415E4-4-14 | Reid Products Inc. Dba Reid Products Inc (USA) |
| D792683E4N14 | Huck International, Inc (USA) |
| 3M943E4-4-14 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| VS3258E4-4-14 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M943E4-4-14 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M943E4-4-14 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| WC943E4-3-14 | West Coast Aerospace, Inc. (USA) |
| 3M943E4-4-14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M943E4-4-14 | Houston Precision Fasteners I Lp (USA) |
| 3M943E4-4-14 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M943E4-4-14 | G.s. Precision, Inc. (USA) |
| 3M943E4-4-14 | Hi-Shear Corporation (USA) |
| VS3258E4-4-14 | Howmet Global Fastening Systems Inc (USA) |
| 3M943E4-4-14 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943E4-4-14 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M943E4-4-14 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M943E4-4-14 | 5/2 Secondary reference U.S. Government activity |
| VS3258E4-4-14 | 5/2 Secondary reference U.S. Government activity |
| AAP139E4-4-14 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5315-01-537-8173 is a Pin,shoulder,headless, manufactured by The Boeing Company Div Defense, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-537-8173 has 20 manufacturer part numbers on file: 3M943E4-4-14 (The Boeing Company Div Defense), 3M943E4-4-14 (Reid Products Inc. Dba Reid Products Inc), 3M943E4-4-14 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 3M943E4-4-14 (Saturn Fasteners Inc), 11415E4-4-14 (Reid Products Inc. Dba Reid Products Inc) and 15 more.
Key specifications for 3M943E4-4-14: Shank Diameter: 0.249 INCHES NOMINAL IN; First End Location: THREADED END; Second End Taper Angle: 45.0 DEGREES NOMINAL; Thread Length: 0.405 INCHES NOMINAL IN. 17 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.