The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-169-0073, 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 18 specifications, cited from the U.S. Government catalog. The record lists 10 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-169-0073 |
| Primary Part Number | ST3M744-6D35 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 2.569 INCHES MINIMUM AND 2.589 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.371 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.578 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | 2.451 INCHES MINIMUM AND 2.481 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 |
|---|---|
| MB154-6D35 | Hi-Shear Corporation (USA) |
| AIC687-6D35 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11823-6D35 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M744-6D35 PRIMARY | The Boeing Company Div Defense (USA) |
| GS1015-6D35 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M744-6D35 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB154-6D35 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S406-6D35 PRIMARY | Huck International, Inc (USA) |
| VS3174-6D35 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| PBF1265-6D35 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 10116071 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S406-6D35 | 5/9 Secondary reference U.S. Government activity |
| VCG0001-6D35 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| VS3174-6D35 | 5/9 Secondary reference U.S. Government activity |
| 122895-6D35 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-169-0073 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-169-0073 has 10 manufacturer part numbers on file: MB154-6D35 (Hi-Shear Corporation), AIC687-6D35 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 11823-6D35 (Reid Products Inc. Dba Reid Products Inc), ST3M744-6D35 (The Boeing Company Div Defense), GS1015-6D35 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 5 more.
Key specifications for ST3M744-6D35: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 2.569 INCHES MINIMUM AND 2.589 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.371 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN. 18 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.