The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-357-1747, 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 14 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-357-1747 |
| Primary Part Number | BM17019-4-6 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 0.756 INCHES MINIMUM AND 0.803 INCHES MAXIMUM IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| VS3204-4-6 | Howmet Global Fastening Systems Inc (USA) |
| BM17019-4-6 PRIMARY | Huck International, Inc (USA) |
| GS1016-4-6 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M453-4-6 | The Boeing Company Div Defense (USA) |
| MB61-4-6 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M453-4-6 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-4-6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23029-4-6 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HP5453-4-6 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-4-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB61-4-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 109453-4-6 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11825-4-6 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M453-4-6 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 109453-4-6 | 5/9 Secondary reference Sps Technologies Inc |
| BM17019-4-6 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-4-6 | 5/2 Secondary reference U.S. Government activity |
| ST3M453-4-6 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-4-6 | 5/9 Secondary reference Pruitt Energy Sources Inc |
NSN 5306-00-357-1747 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-357-1747 has 14 manufacturer part numbers on file: VS3204-4-6 (Howmet Global Fastening Systems Inc), BM17019-4-6 (Huck International, Inc), GS1016-4-6 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), ST3M453-4-6 (The Boeing Company Div Defense), MB61-4-6 (Hi-Shear Corporation) and 9 more.
Key specifications for BM17019-4-6: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.756 INCHES MINIMUM AND 0.803 INCHES MAXIMUM IN; Thread Length: 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 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.