The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-165-2454, 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 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-165-2454 |
| Primary Part Number | ST3M744-6D16 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.210 INCHES NOMINAL IN |
| Fastener Length | 1.381 INCHES MINIMUM AND 1.401 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 | AMS5629 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 | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Head Minor Diameter | 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 | 1.263 INCHES MINIMUM AND 1.293 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 |
|---|---|
| ST3M744-6D16 | Heartland Precision Fasteners Inc (USA) |
| ST3M744-6D16 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| SLB748-6D16 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 11823-6D16 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VS3174-6D16 | Huck International, Inc (USA) |
| 122895-6D16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| PBF1265-6D16 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-6D16 | Howmet Global Fastening Systems Inc (USA) |
| ST3M744-6D16 | Houston Precision Fasteners I Lp (USA) |
| AIC687-6D16 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1015-6D16 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M744-6D16 PRIMARY | The Boeing Company Div Defense (USA) |
| VCG0001-6D16 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC744-6D16 | West Coast Aerospace, Inc. (USA) |
| VS3174-6D16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| S406-6D16 | 5/9 Secondary reference Huck International, Inc |
| VS3174-6D16 | 5/2 Secondary reference U.S. Government activity |
| S406-6D16 | 5/9 Secondary reference U.S. Government activity |
| MB154-6D16 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 10116048 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M744-6D16 | 5/2 Secondary reference U.S. Government activity |
| MB154-6D16 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M744-6D16 | 5/9 Secondary reference Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries |
| MB154-6D16 | 5/9 Secondary reference U.S. Government activity |
| 122895-6D16 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-165-2454 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-165-2454 has 15 manufacturer part numbers on file: ST3M744-6D16 (Heartland Precision Fasteners Inc), ST3M744-6D16 (Fastener Innovation Technology, Inc. Dba F I T), SLB748-6D16 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), 11823-6D16 (Reid Products Inc. Dba Reid Products Inc), VS3174-6D16 (Huck International, Inc) and 10 more.
Key specifications for ST3M744-6D16: Head Height: 0.210 INCHES NOMINAL IN; Fastener Length: 1.381 INCHES MINIMUM AND 1.401 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.