The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-258-8496, 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 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-258-8496 |
| Primary Part Number | ST3M453-12D32 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| Fastener Length | 2.898 INCHES MINIMUM AND 2.945 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.888 INCHES MINIMUM AND 0.955 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN |
| Width Between Flats | 1.064 INCHES MAXIMUM IN |
| Grip Diameter | 0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.760 INCHES MINIMUM AND 2.817 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 |
|---|---|
| ST3M453-12D32 | The Boeing Company Div Defense (USA) |
| MB61-12D32 | Hi-Shear Corporation (USA) |
| PBF1253-12D32 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VS3204-12D32 | Howmet Global Fastening Systems Inc (USA) |
| ST3M453-12D32 | Heartland Precision Fasteners Inc (USA) |
| GS1016-12D32 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VAL23029-12D32 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-12D32 | Houston Precision Fasteners I Lp (USA) |
| AIC753-12D32 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S353-12D32 | Huck International, Inc (USA) |
| S11-1060-12D32 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| FIT7047-12D32 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11825-12D32 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 109453-12D32 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BM17019-12D32 | Huck International, Inc (USA) |
| WC464-12D32 | West Coast Aerospace, Inc. (USA) |
| ST3M453-12D32 | Saturn Fasteners Inc (USA) |
| SLB252-12D32 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| MB61-12D32 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| MA5453-12D32 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| S353-12D32 | 5/9 Secondary reference U.S. Government activity |
| 109453-12D32 | 3/2 Design control — primary reference U.S. Government activity |
| KS3020-12D32 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-12D32 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-12D32 | 5/9 Secondary reference Morgen Industries Inc |
| VS3204-12D32 | 5/9 Secondary reference U.S. Government activity |
| BM17019-12D32 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-258-8496 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-258-8496 has 18 manufacturer part numbers on file: ST3M453-12D32 (The Boeing Company Div Defense), MB61-12D32 (Hi-Shear Corporation), PBF1253-12D32 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VS3204-12D32 (Howmet Global Fastening Systems Inc), ST3M453-12D32 (Heartland Precision Fasteners Inc) and 13 more.
Key specifications for ST3M453-12D32: Head Height: 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN; Fastener Length: 2.898 INCHES MINIMUM AND 2.945 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.888 INCHES MINIMUM AND 0.955 INCHES MAXIMUM 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.