The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-883-3866, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-883-3866 |
| Primary Part Number | 3M33-8-17A |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.281 INCHES NOMINAL IN |
| Fastener Length | 1.844 INCHES NOMINAL IN |
| Thread Length | 0.782 INCHES MINIMUM IN |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.062 INCHES NOMINAL IN |
| Width Between Flats | 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4986 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 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 |
|---|---|
| 3M33-8-17A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 3M33-8-17A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M33-8-17A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M33-8-17A PRIMARY | Huck International, Inc (USA) |
| 3M33-8-17A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| 3M33-8-17A | 3/2 Design control — primary reference U.S. Government activity |
| 3M33-8-17A | 5/9 Secondary reference U.S. Government activity |
| 3M33-8-17A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-00-883-3866 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-883-3866 has 5 manufacturer part numbers on file: 3M33-8-17A (Howmet Global Fastening Systems Inc), 3M33-8-17A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M33-8-17A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M33-8-17A (Huck International, Inc), 3M33-8-17A (Valley-Todeco, Inc. Dba Arconic Fastening Systems).
Key specifications for 3M33-8-17A: Head Height: 0.281 INCHES NOMINAL IN; Fastener Length: 1.844 INCHES NOMINAL IN; Thread Length: 0.782 INCHES MINIMUM IN; Material Document and Classification: AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 14 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.