The Bolt,shoulder, cataloged under National Stock Number 5306-01-172-3265, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-172-3265 |
| Primary Part Number | ST3M494-3D7 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.761 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN |
| Shoulder Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.608 INCHES MINIMUM AND 0.618 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| VS3251-3-D-7 | Howmet Global Fastening Systems Inc (USA) |
| ST3M494-3D7 PRIMARY | The Boeing Company Div Defense (USA) |
| PBF1263-3D7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1065-3D7 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| ST3M494-3D7 | 5/2 Secondary reference U.S. Government activity |
| ST3M494 | D/9 Drawing number reference only The Boeing Company Div Defense |
| ST3M494-3D7 | 5/2 Secondary reference U.S. Government activity |
| VS3251-3-D-7 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-172-3265 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-172-3265 has 4 manufacturer part numbers on file: VS3251-3-D-7 (Howmet Global Fastening Systems Inc), ST3M494-3D7 (The Boeing Company Div Defense), PBF1263-3D7 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), S11-1065-3D7 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-472-1915. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M494-3D7: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.761 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN; Shoulder Length: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.