The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-462-2746, 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 19 specifications, cited from the U.S. Government catalog. The record lists 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-462-2746 |
| Primary Part Number | ST3M744-4D18 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.431 INCHES MINIMUM AND 1.451 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.316 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE 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 | 1.125 INCHES NOMINAL 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 |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.323 INCHES MINIMUM AND 1.333 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 |
|---|---|
| ST3M744-4D18 | Huck International, Inc (USA) |
| ST3M744-4D18 | Saturn Fasteners Inc (USA) |
| AIC687-4D18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-4D18 | West Coast Aerospace, Inc. (USA) |
| PBF1265-4D18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-4D18 PRIMARY | The Boeing Company Div Defense (USA) |
| GS1015-4D18 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 11823-4D18 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M744-4D18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M744-4D18 | Howmet Global Fastening Systems Inc (USA) |
| ST3M744-4D18 | Houston Precision Fasteners I Lp (USA) |
| VCG0001-4D18 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M744-4D18 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| ST3M744-4D18 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M744-4D18 | Heartland Precision Fasteners Inc (USA) |
| ST3M744-4D18 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| VS3174-4D18 | 5/2 Secondary reference U.S. Government activity |
| 122895-4D18 | 5/2 Secondary reference U.S. Government activity |
| S406-4D18 | 5/9 Secondary reference U.S. Government activity |
| MB154-4D18 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5306-01-462-2746 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-462-2746 has 16 manufacturer part numbers on file: ST3M744-4D18 (Huck International, Inc), ST3M744-4D18 (Saturn Fasteners Inc), AIC687-4D18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M744-4D18 (West Coast Aerospace, Inc.), PBF1265-4D18 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 11 more.
Key specifications for ST3M744-4D18: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.431 INCHES MINIMUM AND 1.451 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.316 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.