The Bolt,machine, cataloged under National Stock Number 5306-01-242-0621, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-242-0621 |
| Primary Part Number | 3176210-C-004 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN |
| Fastener Length | 0.875 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633 TYPE 2 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.775 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Locking Feature | PATCH THREADS |
| Surface Treatment | ZINC AND PHOSPHATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 3176210-C-004 PRIMARY | Naval Sea Systems Command (USA) |
| 3176210-C-004 | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 3176210-C-004 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| SF10901 PIECE 29 | C/1 Advisory reference — outside the item-of-supply concept Circor Pumps North America Llc |
NSN 5306-01-242-0621 is a Bolt,machine, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-242-0621 has 2 manufacturer part numbers on file: 3176210-C-004 (Naval Sea Systems Command), 3176210-C-004 (Bae Systems Land & Armaments L.p.).
Key specifications for 3176210-C-004: Head Height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN; Fastener Length: 0.875 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633 TYPE 2 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.775 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN. 19 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.