The Bolt,machine, cataloged under National Stock Number 5306-00-145-7069, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-00-145-7069 |
| Primary Part Number | AN3C4 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Head Height | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN |
| Fastener Length | 0.516 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Thread Length | 0.374 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN |
| Width Between Flats | 0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 431 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.375 INCHES MINIMUM AND 0.406 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| AN3C4 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| AN3CA | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5306PL2130331 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AN3C4 | 2/2 Government specification standardization U.S. Government activity |
NSN 5306-00-145-7069 is a Bolt,machine, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-145-7069 has 1 manufacturer part number on file: AN3C4 (Leonardo Spa Helicopters Division - Production Site).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-146-6133. Verify interchangeability with system specifications before substitution.
Key specifications for AN3C4: Head Height: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN; Fastener Length: 0.516 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN; Thread Length: 0.374 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL. 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.