The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-321-9307, 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 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-321-9307 |
| Primary Part Number | ST3M453-5D16 |
| 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 | 1.451 INCHES MINIMUM AND 1.498 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 |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 08524-B-17019 MANUFACTURERS STANDARD |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 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 | 1.327 INCHES MINIMUM AND 1.384 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 |
|---|---|
| 11825-5D16 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HP5453-5D16 | Heartland Precision Fasteners Inc (USA) |
| VS3204-5D16 | Howmet Global Fastening Systems Inc (USA) |
| VAL23029-5D16 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S11-1060-5D16 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-5D16 | Houston Precision Fasteners I Lp (USA) |
| PBF1253-5D16 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC753-5D16 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M453-5D16 PRIMARY | The Boeing Company Div Defense (USA) |
| BM17019-5D16 | Huck International, Inc (USA) |
| GS1016-5D16 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB61-5D16 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB61-5D16 | Hi-Shear Corporation (USA) |
| 109453-5D16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M453-5D16 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| WC453-5D16 | West Coast Aerospace, Inc. (USA) |
| SLB252-5D16 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| FIT7047-5D16 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 109453-5D16 | 5/9 Secondary reference Sps Technologies Inc |
| BM17019-5D16 | 5/9 Secondary reference U.S. Government activity |
| KS3020-5D16 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| 109453-5D16 | 5/2 Secondary reference U.S. Government activity |
| S353-5D16 | 5/9 Secondary reference Huck International, Inc |
| S353-5D16 | 5/9 Secondary reference U.S. Government activity |
| US3204-5D16 | 5/9 Secondary reference U.S. Government activity |
| MA5453-5D16 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| 10114234 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| VS3204-5D16 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-321-9307 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-321-9307 has 18 manufacturer part numbers on file: 11825-5D16 (Reid Products Inc. Dba Reid Products Inc), HP5453-5D16 (Heartland Precision Fasteners Inc), VS3204-5D16 (Howmet Global Fastening Systems Inc), VAL23029-5D16 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), S11-1060-5D16 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 13 more.
Key specifications for ST3M453-5D16: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.451 INCHES MINIMUM AND 1.498 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. 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.