The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-477-7368, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-477-7368 |
| Primary Part Number | ST3M744-16D32 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.539 INCHES NOMINAL IN |
| Fastener Length | 2.760 INCHES MINIMUM AND 2.780 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.770 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FASTENER IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.000 INCHES NOMINAL IN |
| Head Minor Diameter | 1.490 INCHES MINIMUM AND 1.498 INCHES MAXIMUM IN |
| Grip Diameter | 1.406 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.630 INCHES MINIMUM FASTENER IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| WC744-16D32 | West Coast Aerospace, Inc. (USA) |
| ST3M744-16D32 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| AIC687-16D32 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3174-16D32 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M744-16D32 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-16D32 | Houston Precision Fasteners I Lp (USA) |
| VS3174-16D32 PRIMARY | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| SLB748-16D32 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3174-16D32 PRIMARY | Huck International, Inc (USA) |
| 11823-16D32 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VCG0001-16D32 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1015-16D32 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 122895-16D32 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M744-16D32 | The Boeing Company Div Defense (USA) |
| PBF1265-16D32 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 122895-16D32 | 3/2 Design control — primary reference U.S. Government activity |
| VS3174-16D32 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-477-7368 is a Bolt,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-477-7368 has 15 manufacturer part numbers on file: WC744-16D32 (West Coast Aerospace, Inc.), ST3M744-16D32 (Heartland Precision Fasteners Inc), AIC687-16D32 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VS3174-16D32 (Howmet Global Fastening Systems Inc), ST3M744-16D32 (Fastener Innovation Technology, Inc. Dba F I T) and 10 more.
Key specifications for ST3M744-16D32: Head Height: 0.539 INCHES NOMINAL IN; Fastener Length: 2.760 INCHES MINIMUM AND 2.780 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.770 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.