The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-206-7256, 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 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-206-7256 |
| Primary Part Number | ST3M453-5-4 |
| 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 | 0.701 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Width Between Flats | 0.482 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| ST3M453-5-4 | J M Precision Inc (USA) |
| MB61-5-4 | Hi-Shear Corporation (USA) |
| ST3M453-5-4 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-5-4 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| PBF1253-5-4 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11825-5-4 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M453-5-4 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M453-5-4 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB61-5-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M453-5-4 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| S11-1060-5-4 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| AIC753-5-4 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VAL23029-5-4 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1016-5-4 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-5-4 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| 109453-5-4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| KS3020-5-4 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| VS3204-5-4 | 5/9 Secondary reference U.S. Government activity |
| BM17019-5-4 | 5/9 Secondary reference U.S. Government activity |
| 109453-5-4 | 5/2 Secondary reference U.S. Government activity |
| ST3M453-5-4 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| S353-5-4 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| MA5453-5-4 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M453-5-4 | 5/2 Secondary reference U.S. Government activity |
| VS3204-5-4 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| S353-5-4 | 5/9 Secondary reference U.S. Government activity |
| BM17019-5-4 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-206-7256 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-206-7256 has 14 manufacturer part numbers on file: ST3M453-5-4 (J M Precision Inc), MB61-5-4 (Hi-Shear Corporation), ST3M453-5-4 (Heartland Precision Fasteners Inc), ST3M453-5-4 (Fastener Innovation Technology, Inc. Dba F I T), PBF1253-5-4 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 9 more.
Key specifications for ST3M453-5-4: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 0.701 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM 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.