The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-718-8406, 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 24 specifications, cited from the U.S. Government catalog. The record lists 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-718-8406 |
| Primary Part Number | 3M943E4-6-4 |
| 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 |
| First End Taper Length | 0.030 INCHES NOMINAL IN |
| First End Location | THREADED END |
| Surface Treatment Document and Classification | AMS 2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.405 INCHES NOMINAL IN |
| First End Style | CHAMFERED |
| Shank Length | 0.78 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | AMS 5629PH13-8MO CRES AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| First End Taper Angle | 45.0 DEGREES NOMINAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.2500 INCHES IN |
| Specification/standard Data | 76301-3-943 MANUFACTURERS STANDARD |
| Second End Outer Radius | 0.060 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Second Shank Length | 0.500 INCHES NOMINAL IN |
| Shoulder Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Second End Style | ROUND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 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 |
|---|---|
| 3M943E4-6-4 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M943E4-6-4 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M943E4-6-4 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| D792683E6N4 | Huck International, Inc (USA) |
| 3M943E4-6-4 | G.s. Precision, Inc. (USA) |
| 3M943E4-6-4 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M943E4-6-4 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VS3258E4-6-4 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M943E4-6-4 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11415E4-6-4 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VS3258E4-6-4 | Howmet Global Fastening Systems Inc (USA) |
| 3M943E4-6-4 | Houston Precision Fasteners I Lp (USA) |
| 3M943E4-6-4 | Heartland Precision Fasteners Inc (USA) |
| WC943E4-6-4 | West Coast Aerospace, Inc. (USA) |
| 3M943E4-6-4 | Hi-Shear Corporation (USA) |
| 3M943E4-6-4 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M943E4-6-4 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M943E4-6-4 | Saturn Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| 3M943 | D/9 Drawing number reference only The Boeing Company Div Defense |
| VS3258E4-6-4 | 5/2 Secondary reference U.S. Government activity |
| 3M943E4-6-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-01-718-8406 is a Pin,shoulder,headless, manufactured by The Boeing Company Div Defense, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-718-8406 has 18 manufacturer part numbers on file: 3M943E4-6-4 (The Boeing Company Div Defense), 3M943E4-6-4 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M943E4-6-4 (Fastener Innovation Technology, Inc. Dba F I T), D792683E6N4 (Huck International, Inc), 3M943E4-6-4 (G.s. Precision, Inc.) and 13 more.
2 possible matches (shared part number, not a government interchangeability claim): 5315-01-721-5707, 5315-01-721-5711. Verify interchangeability with system specifications before substitution.
Key specifications for 3M943E4-6-4: 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 Taper Length: 0.030 INCHES NOMINAL IN; First End Location: THREADED END. 24 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.