The Bolt,machine, cataloged under National Stock Number 5306-00-616-8618, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-616-8618 |
| Primary Part Number | 3M33-4-3A |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN |
| Fastener Length | 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| 3M33-4-3A | Howmet Global Fastening Systems Inc (USA) |
| 3M33-4-3A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M33-4-3A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M33-4-3A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M33-4-3A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M33-4-3A | 5/2 Secondary reference U.S. Government activity |
| 3M33-4-3A | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-616-8618 is a Bolt,machine, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-616-8618 has 5 manufacturer part numbers on file: 3M33-4-3A (Howmet Global Fastening Systems Inc), 3M33-4-3A (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M33-4-3A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M33-4-3A (The Boeing Company Div Defense), 3M33-4-3A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for 3M33-4-3A: Head Height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN; Fastener Length: 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Thread Length: 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM 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.