The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-477-7392, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-477-7392 |
| Primary Part Number | ST3M744-12D57 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.400 INCHES NOMINAL IN |
| Fastener Length | 4.125 INCHES MINIMUM AND 4.145 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.572 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FASTENER IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.563 INCHES NOMINAL IN |
| Head Minor Diameter | 1.097 INCHES MINIMUM AND 1.107 INCHES MAXIMUM IN |
| Grip Diameter | 1.031 INCHES MINIMUM AND 1.063 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.982 INCHES MINIMUM AND 0.984 INCHES MAXIMUM FASTENER IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| ST3M744-12D57 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M744-12D57 | The Boeing Company Div Defense (USA) |
| PBF1265-12D57 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1015-12D57 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VCG0001-12D57 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC744-12D57 | West Coast Aerospace, Inc. (USA) |
| 122895-12D57 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M744-12D57 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-12D57 | Houston Precision Fasteners I Lp (USA) |
| ST3M744-12D57 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VS3174-12D57 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| SLB748-12D57 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3174-12D57 PRIMARY | Huck International, Inc (USA) |
| 11823-12D57 | Reid Products Inc. Dba Reid Products Inc (USA) |
| AIC687-12D57 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| VS3174-12D57 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| VS3174-12D57 | 3/2 Design control — primary reference U.S. Government activity |
| 122895-12D57 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-477-7392 is a Bolt,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-477-7392 has 15 manufacturer part numbers on file: ST3M744-12D57 (Heartland Precision Fasteners Inc), ST3M744-12D57 (The Boeing Company Div Defense), PBF1265-12D57 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GS1015-12D57 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), VCG0001-12D57 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 10 more.
Key specifications for ST3M744-12D57: Head Height: 0.400 INCHES NOMINAL IN; Fastener Length: 4.125 INCHES MINIMUM AND 4.145 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.572 INCHES NOMINAL IN. 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.