The Bolt,machine, cataloged under National Stock Number 5306-00-421-7884, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is United States Department of the Navy Dba Naval Undersea Warfare Ctr Div. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-421-7884 |
| Primary Part Number | 3166921-155 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | United States Department of the Navy Dba Naval Undersea Warfare Ctr Div |
| Status | ACTIVE |
| Head Height | 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN |
| Fastener Length | 9.250 INCHES NOMINAL IN |
| Thread Length | 2.250 INCHES MINIMUM AND 2.527 INCHES MAXIMUM IN |
| Hardness Rating | 22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 115000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 9 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 3166921-155 PRIMARY | United States Department of the Navy Dba Naval Undersea Warfare Ctr Div (USA) |
| Reference | Meaning |
|---|---|
| 3166921-155 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 5306-00-421-7884 is a Bolt,machine, manufactured by United States Department of the Navy Dba Naval Undersea Warfare Ctr Div, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-421-7884 has 1 manufacturer part number on file: 3166921-155 (United States Department of the Navy Dba Naval Undersea Warfare Ctr Div).
Key specifications for 3166921-155: Head Height: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN; Fastener Length: 9.250 INCHES NOMINAL IN; Thread Length: 2.250 INCHES MINIMUM AND 2.527 INCHES MAXIMUM IN; Hardness Rating: 22.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM 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.