The Bolt,shoulder, cataloged under National Stock Number 5306-01-191-4571, 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 22 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-191-4571 |
| Primary Part Number | ST3M494-5D35 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 2.632 INCHES MINIMUM AND 2.682 INCHES MAXIMUM IN |
| Shoulder Length | 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.434 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 85000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.441 INCHES MINIMUM AND 2.511 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 |
|---|---|
| ST3M494-5D35 PRIMARY | The Boeing Company Div Defense (USA) |
| S11-1065-5D35 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| PBF1263-5D35 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M494-5D35 | Howmet Global Fastening Systems Inc (USA) |
| ST3M494-5D35 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| VS3251-5-D-35 | 5/2 Secondary reference U.S. Government activity |
| ST3M494-5D35 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-191-4571 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-191-4571 has 5 manufacturer part numbers on file: ST3M494-5D35 (The Boeing Company Div Defense), S11-1065-5D35 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), PBF1263-5D35 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M494-5D35 (Howmet Global Fastening Systems Inc), ST3M494-5D35 (Sps Technologies Ltd, Tj Brooks Division).
Key specifications for ST3M494-5D35: Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 2.632 INCHES MINIMUM AND 2.682 INCHES MAXIMUM IN; Shoulder Length: 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.