The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-209-7951, 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 16 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-209-7951 |
| Primary Part Number | ST3M744-4-9 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 0.868 INCHES MINIMUM AND 0.888 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 |
| Material Document and Classification | AMS 5629 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 | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Head Minor Diameter | 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) |
| 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 |
|---|---|
| ST3M744-4-9 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M744-4-9 | Heartland Precision Fasteners Inc (USA) |
| S406-4-9 | Huck International, Inc (USA) |
| VS3174-4-9 | Howmet Global Fastening Systems Inc (USA) |
| VCG0001-4-9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB154-4-9 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GS1015-4-9 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB154-4-9 | Hi-Shear Corporation (USA) |
| PBF1265-4-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-4-9 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| AIC687-4-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-4-9 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS174-4-9 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 122895-4-9 | 5/2 Secondary reference U.S. Government activity |
| VS3174-4-9 | 5/9 Secondary reference U.S. Government activity |
| S406-4-9 | 5/9 Secondary reference U.S. Government activity |
| 10116152 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5306-01-209-7951 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-209-7951 has 12 manufacturer part numbers on file: ST3M744-4-9 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), ST3M744-4-9 (Heartland Precision Fasteners Inc), S406-4-9 (Huck International, Inc), VS3174-4-9 (Howmet Global Fastening Systems Inc), VCG0001-4-9 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 7 more.
Key specifications for ST3M744-4-9: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.868 INCHES MINIMUM AND 0.888 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. 16 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.