The Bolt,shoulder, cataloged under National Stock Number 5306-01-208-5170, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Fastener Innovation Technology, Inc. Dba F I T. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-208-5170 |
| Primary Part Number | ST3M838-5D12 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Fastener Innovation Technology, Inc. Dba F I T |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.201 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN |
| Shoulder Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3427 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Head Minor Diameter | 0.512 INCHES MINIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.077 INCHES MINIMUM AND 1.134 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 |
|---|---|
| ST3M838-5D12 | Houston Precision Fasteners I Lp (USA) |
| VS3191-5D12Y | Howmet Global Fastening Systems Inc (USA) |
| ST3M838-5D12 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB160-5D12 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M838-5D12 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M838-5D12 | Heartland Precision Fasteners Inc (USA) |
| ST3M838-5D12 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| PBF1270-5D12 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 122898-5D12 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB160-5D12 PRIMARY | Hi-Shear Corporation (USA) |
| VS3191-5D12Y | Huck International, Inc (USA) |
| WC838-5D12 | West Coast Aerospace, Inc. (USA) |
| ST3M838-5D12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11939-5D12 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M838-5D12 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 122898-5D12 | 5/2 Secondary reference U.S. Government activity |
| ST3M838-5D12 | 5/9 Secondary reference U.S. Government activity |
| 122898-5D12 | 5/9 Secondary reference Sps Technologies Inc |
| VS3191-5D12Y | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-208-5170 is a Bolt,shoulder, manufactured by Fastener Innovation Technology, Inc. Dba F I T, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-208-5170 has 14 manufacturer part numbers on file: ST3M838-5D12 (Houston Precision Fasteners I Lp), VS3191-5D12Y (Howmet Global Fastening Systems Inc), ST3M838-5D12 (Fastener Innovation Technology, Inc. Dba F I T), MB160-5D12 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M838-5D12 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 9 more.
Key specifications for ST3M838-5D12: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.201 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN; Shoulder Length: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.