The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-374-9233, 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 33 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-374-9233 |
| Primary Part Number | ST3M453-9-27 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN |
| Fastener Length | 2.396 INCHES MINIMUM AND 2.443 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.725 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.677 INCHES MINIMUM AND 1.697 INCHES MAXIMUM IN |
| Width Between Flats | 0.877 INCHES MAXIMUM IN |
| Grip Diameter | 0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| 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 |
|---|---|
| FIT7047-9-27 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| PBF1253-9-27 | Molex, Llc (USA) |
| ST3M453-9-27 PRIMARY | The Boeing Company Div Defense (USA) |
| 109453-9-27 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SLB252-9-27 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| ST3M453-9-27 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-9-27 PRIMARY | Huck International, Inc (USA) |
| ST3M453-9-27 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB61-9-27 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M453-9-27 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1016-9-27 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VAL23029-9-27 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-9-27 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VS304-9-27 | Howmet Global Fastening Systems Inc (USA) |
| WC453-9-27 | West Coast Aerospace, Inc. (USA) |
| ST3M453-9-27 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M453-9-27 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-9-27 PRIMARY | West Coast Aerospace, Inc. (USA) |
| S11-1060-9-27 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-9-27 PRIMARY | Stone Manufacturing & Supply Co., Inc Dba Stone Manufacturing & Supply (USA) |
| Reference | Meaning |
|---|---|
| VS304-9-27 | 5/9 Secondary reference U.S. Government activity |
| 109453-9-27 | 5/2 Secondary reference U.S. Government activity |
| KS3020-9-27 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| S353-9-27 | 5/9 Secondary reference U.S. Government activity |
| S353-9-27 | 5/9 Secondary reference Huck International, Inc |
| BM17019-9-27 | 5/9 Secondary reference Deutsch Co the |
| ST3M453-9-27 | 3/2 Design control — primary reference U.S. Government activity |
| MA5453-9-27 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
NSN 5306-01-374-9233 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-374-9233 has 33 manufacturer part numbers on file: FIT7047-9-27 (Fastener Innovation Technology, Inc. Dba F I T), PBF1253-9-27 (Molex, Llc), ST3M453-9-27 (The Boeing Company Div Defense), 109453-9-27 (Sps Technologies, Llc Dba PB Fasteners), SLB252-9-27 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 28 more.
Key specifications for ST3M453-9-27: Head Height: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN; Fastener Length: 2.396 INCHES MINIMUM AND 2.443 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.725 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.