The Bolt,shoulder, cataloged under National Stock Number 5306-00-541-9178, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Acufast Aircraft Products. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-541-9178 |
| Primary Part Number | S6120-65164-4 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Acufast Aircraft Products |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 2.734 INCHES MINIMUM AND 2.781 INCHES MAXIMUM IN |
| Shoulder Length | 2.222 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.5603 INCHES MINIMUM AND 0.5611 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.450 INCHES MINIMUM AND 0.497 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.106 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.875 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.577 INCHES NOMINAL 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 |
|---|---|
| S6120-65164-4 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| S6120-65164-4 PRIMARY | Acufast Aircraft Products (USA) |
NSN 5306-00-541-9178 is a Bolt,shoulder, manufactured by Acufast Aircraft Products, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-541-9178 has 2 manufacturer part numbers on file: S6120-65164-4 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), S6120-65164-4 (Acufast Aircraft Products).
Key specifications for S6120-65164-4: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 2.734 INCHES MINIMUM AND 2.781 INCHES MAXIMUM IN; Shoulder Length: 2.222 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.5603 INCHES MINIMUM AND 0.5611 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.