The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-165-7544, 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 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-01-165-7544 |
| Primary Part Number | ST3M744-4D23 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.744 INCHES MINIMUM AND 1.764 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.296 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.428 INCHES MINIMUM AND 1.448 INCHES MAXIMUM IN |
| Width Between Flats | 0.448 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.626 INCHES MINIMUM AND 1.656 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 |
|---|---|
| MB154-4D23 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB154-4D23 | Hi-Shear Corporation (USA) |
| AIC687-4D23 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-4D23 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VCG0001-4D23 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M744-4D23 PRIMARY | The Boeing Company Div Defense (USA) |
| PBF1265-4D23 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 10116061 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 122895-4D23 | 5/2 Secondary reference U.S. Government activity |
| VS3174-4D23 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M744-4D23 | 5/2 Secondary reference U.S. Government activity |
| ST3M744-4D23 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| VS3174-4D23 | 5/9 Secondary reference U.S. Government activity |
| S406-4D23 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-165-7544 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-165-7544 has 7 manufacturer part numbers on file: MB154-4D23 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), MB154-4D23 (Hi-Shear Corporation), AIC687-4D23 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M744-4D23 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), VCG0001-4D23 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 4810-01-467-1798. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M744-4D23: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.744 INCHES MINIMUM AND 1.764 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.296 INCHES MINIMUM AND 0.336 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.