The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-356-1724, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-356-1724 |
| Primary Part Number | BM17019-5-18 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.576 INCHES MINIMUM AND 1.623 INCHES MAXIMUM IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 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 | UNF |
| 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 |
|---|---|
| ST3M453-5-18 | J M Precision Inc (USA) |
| ST3M453-5-18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11825-5-18 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VAL23029-5-18 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 109453-5-18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB61-5-18 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB61-5-18 | Hi-Shear Corporation (USA) |
| ST3M453-5-18 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-5-18 | The Boeing Company Div Defense (USA) |
| ST3M453-5-18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BM17019-5-18 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-5-18 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| BM17019-5-18 | 5/9 Secondary reference U.S. Government activity |
| 109453-5-18 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M453-5-18 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| US3204-5-18 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-356-1724 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-356-1724 has 11 manufacturer part numbers on file: ST3M453-5-18 (J M Precision Inc), ST3M453-5-18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 11825-5-18 (Reid Products Inc. Dba Reid Products Inc), VAL23029-5-18 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 109453-5-18 (Sps Technologies, Llc Dba PB Fasteners) and 6 more.
Key specifications for BM17019-5-18: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.576 INCHES MINIMUM AND 1.623 INCHES MAXIMUM IN; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.312 INCHES IN. 13 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.