The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-486-3020, 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 15 specifications, cited from the U.S. Government catalog. The record lists 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-486-3020 |
| Primary Part Number | BM17019-6-8 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 08524-B-17019 MANUFACTURERS STANDARD |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| BM17019-6-8 PRIMARY | Huck International, Inc (USA) |
| ST3M453-6-8 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M453-6-8 | J M Precision Inc (USA) |
| ST3M453-6-8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M453-6-8 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB61-6-8 PRIMARY | Hi-Shear Corporation (USA) |
| VAL23029-6-8 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-6-8 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| MB61-6-8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M453-6-8 | Howmet Global Fastening Systems Inc (USA) |
| 11825-6-8 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M453-6-8 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-6-8 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-6-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GS1016-6-8 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-6-8 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| BM17019-6-8 | 5/9 Secondary reference U.S. Government activity |
| US3204-6-8 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M453-6-8 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
NSN 5306-00-486-3020 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-486-3020 has 15 manufacturer part numbers on file: BM17019-6-8 (Huck International, Inc), ST3M453-6-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M453-6-8 (J M Precision Inc), ST3M453-6-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M453-6-8 (Fastener Innovation Technology, Inc. Dba F I T) and 10 more.
1 possible match (shared part number, not a government interchangeability claim): 5905-00-569-5562. Verify interchangeability with system specifications before substitution.
Key specifications for BM17019-6-8: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN; Thread Length: 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN; Material Document and Classification: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 15 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.