The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-278-1995, 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 17 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-278-1995 |
| Primary Part Number | ST3M744-7-19 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.257 INCHES NOMINAL IN |
| Fastener Length | 1.631 INCHES MINIMUM AND 1.651 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.433 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.711 INCHES MINIMUM AND 0.717 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| ST3M744-7-19 PRIMARY | The Boeing Company Div Defense (USA) |
| VS3174-7-19 | Howmet Global Fastening Systems Inc (USA) |
| S406-7-19 | Huck International, Inc (USA) |
| VCG0001-7-19 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| PBF1265-7-19 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11823-7-19 | Reid Products Inc. Dba Reid Products Inc (USA) |
| MB154-7-19 | Hi-Shear Corporation (USA) |
| MB154-7-19 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC687-7-19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| S406-7-19 | 5/9 Secondary reference U.S. Government activity |
| VS3174-7-19 | 5/9 Secondary reference U.S. Government activity |
| 10116195 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 122895-7-19 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-278-1995 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-278-1995 has 9 manufacturer part numbers on file: ST3M744-7-19 (The Boeing Company Div Defense), VS3174-7-19 (Howmet Global Fastening Systems Inc), S406-7-19 (Huck International, Inc), VCG0001-7-19 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), PBF1265-7-19 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 4 more.
Key specifications for ST3M744-7-19: Head Height: 0.257 INCHES NOMINAL IN; Fastener Length: 1.631 INCHES MINIMUM AND 1.651 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.433 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN. 17 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.