The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-127-3752, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-127-3752 |
| Primary Part Number | ST3M744-5D15 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.303 INCHES MINIMUM AND 1.323 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.355 INCHES MINIMUM AND 0.395 INCHES MAXIMUM 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 |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Width Between Flats | 0.514 INCHES MINIMUM AND 0.521 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM 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 | 1.185 INCHES MINIMUM AND 1.215 INCHES MAXIMUM ALL HOLES 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 |
|---|---|
| ST3M744-5D15 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB154-5D15 | Hi-Shear Corporation (USA) |
| VCG0001-5D15 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M744-5D15 PRIMARY | West Coast Aerospace, Inc. (USA) |
| AIC687-5D15 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB154-5D15 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M744-5D15 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| S406-5D15 | Huck International, Inc (USA) |
| ST3M744-5D15 | Howmet Global Fastening Systems Inc (USA) |
| VS3174-5D15 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| PBF1265-5D15 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-5D15 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M744-5D15 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-5D15 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M744-5D15 PRIMARY | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| 10115782 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 122895-5D15 | 5/2 Secondary reference U.S. Government activity |
| S406-5D15 | 5/9 Secondary reference U.S. Government activity |
| VS3174-5D15 | 5/9 Secondary reference U.S. Government activity |
| ST3M744-5D15 | 5/9 Secondary reference U.S. Government activity |
| ST3M744-5D15 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-01-127-3752 is a Bolt,close Tolerance, manufactured by B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-127-3752 has 15 manufacturer part numbers on file: ST3M744-5D15 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), MB154-5D15 (Hi-Shear Corporation), VCG0001-5D15 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M744-5D15 (West Coast Aerospace, Inc.), AIC687-5D15 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 10 more.
Key specifications for ST3M744-5D15: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.303 INCHES MINIMUM AND 1.323 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.355 INCHES MINIMUM AND 0.395 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.