The Bolt,shoulder, cataloged under National Stock Number 5306-01-249-4151, 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 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-249-4151 |
| Primary Part Number | 3M381-3D16 |
| 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 | 1.323 INCHES MINIMUM AND 1.353 INCHES MAXIMUM IN |
| Shoulder Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 3M381-3D16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M381-3D16 | Howmet Global Fastening Systems Inc (USA) |
| 3M381-3D16 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M381-3D16 | Huck International, Inc (USA) |
| 3M381-3D16 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 3M381-3D16 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-249-4151 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-249-4151 has 5 manufacturer part numbers on file: 3M381-3D16 (Sps Technologies, Llc Dba PB Fasteners), 3M381-3D16 (Howmet Global Fastening Systems Inc), 3M381-3D16 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M381-3D16 (Huck International, Inc), 3M381-3D16 (The Boeing Company Div Defense).
Key specifications for 3M381-3D16: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 1.323 INCHES MINIMUM AND 1.353 INCHES MAXIMUM IN; Shoulder Length: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TY 2 CL 3 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.