The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-078-5977, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-078-5977 |
| Primary Part Number | ST3M453-5D15 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.389 INCHES MINIMUM AND 1.436 INCHES MAXIMUM IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | 23-112,FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-453 MANUFACTURERS STANDARD |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.265 INCHES MINIMUM AND 1.322 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 |
|---|---|
| VAL23029-5D15 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-5D15 PRIMARY | The Boeing Company Div Defense (USA) |
| AIC753-5D15 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HP5453-5D15 | Heartland Precision Fasteners Inc (USA) |
| PBF1253-5D15 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| FIT7047-5D15 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VS3204-5D15 | Howmet Global Fastening Systems Inc (USA) |
| S11-1060-5D15 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB61-5D15 | Hi-Shear Corporation (USA) |
| BM17019-5D15 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| S353-5D15 | 5/9 Secondary reference U.S. Government activity |
| MB61-5D15 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| GS1016-5D15 | 5/9 Secondary reference B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace |
| VS3204-5D15 | 5/9 Secondary reference U.S. Government activity |
| 11825-5D15 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| BM17019-5D15 | 5/9 Secondary reference U.S. Government activity |
| 109453-5D15 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 109453-5D15 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-078-5977 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-078-5977 has 10 manufacturer part numbers on file: VAL23029-5D15 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M453-5D15 (The Boeing Company Div Defense), AIC753-5D15 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HP5453-5D15 (Heartland Precision Fasteners Inc), PBF1253-5D15 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 5 more.
Key specifications for ST3M453-5D15: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.389 INCHES MINIMUM AND 1.436 INCHES MAXIMUM IN; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE 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.