The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-374-8358, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-374-8358 |
| Primary Part Number | ST3M453-6-15 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.438 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.516 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN |
| Width Between Flats | 0.564 INCHES MINIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| BM17019-6-15 | Deutsch Co the (USA) |
| ST3M453-6-15 PRIMARY | The Boeing Company Div Defense (USA) |
| MB61-6-15 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC753-6-15 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB61-6-15 | Hi-Shear Corporation (USA) |
| ST3M453-6-15 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11825-6-15 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M453-6-15 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| PBF1253-6-15 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 109453-6-15 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GS1016-6-15 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M453-6-15 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-6-15 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-6-15 | J M Precision Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-6-15 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| VS3204-6-15 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-6-15 | 5/2 Secondary reference U.S. Government activity |
| ST3M453-6-15 | 5/2 Secondary reference U.S. Government activity |
| VS3204-6-15 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M453-6-15 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
NSN 5306-01-374-8358 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-374-8358 has 14 manufacturer part numbers on file: BM17019-6-15 (Deutsch Co the), ST3M453-6-15 (The Boeing Company Div Defense), MB61-6-15 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), AIC753-6-15 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), MB61-6-15 (Hi-Shear Corporation) and 9 more.
Key specifications for ST3M453-6-15: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.438 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.516 INCHES NOMINAL 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.