The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-462-2856, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 17 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-462-2856 |
| Primary Part Number | VS3174-6D25 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.210 INCHES NOMINAL IN |
| Fastener Length | 1.931 INCHES MINIMUM AND 1.951 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.391 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 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 | 1.550 INCHES NOMINAL 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 |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| 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 | 1.823 INCHES MINIMUM AND 1.833 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 |
|---|---|
| VS3174-6D25 PRIMARY | Huck International, Inc (USA) |
| WC744-6D25 | West Coast Aerospace, Inc. (USA) |
| ST3M744-6D25 | Saturn Fasteners Inc (USA) |
| AIC687-6D25 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-6D25 | Houston Precision Fasteners I Lp (USA) |
| VCG0001-6D25 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| PBF1265-6D25 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M744-6D25 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M744-6D25 | Heartland Precision Fasteners Inc (USA) |
| ST3M744-6D25 | The Boeing Company Div Services (USA) |
| 122895-6D25 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GS1015-6D25 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M744-6D25 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-6D25 PRIMARY | The Boeing Company Div Defense (USA) |
| VS3174-6D25 | Howmet Global Fastening Systems Inc (USA) |
| 11823-6D25 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| SLB748-6D25 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| MB154-6D25 | 5/9 Secondary reference Hi-Shear Corporation |
| 122895-6D25 | 5/2 Secondary reference U.S. Government activity |
| VS3174-6D25 | 5/2 Secondary reference U.S. Government activity |
| S406-6D25 | 5/9 Secondary reference U.S. Government activity |
| 122895-6D25 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-462-2856 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-462-2856 has 17 manufacturer part numbers on file: VS3174-6D25 (Huck International, Inc), WC744-6D25 (West Coast Aerospace, Inc.), ST3M744-6D25 (Saturn Fasteners Inc), AIC687-6D25 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M744-6D25 (Houston Precision Fasteners I Lp) and 12 more.
Key specifications for VS3174-6D25: Head Height: 0.210 INCHES NOMINAL IN; Fastener Length: 1.931 INCHES MINIMUM AND 1.951 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.391 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.