The Bolt,machine, cataloged under National Stock Number 5306-01-615-1387, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-615-1387 |
| Primary Part Number | HS4243-6-44 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Extended Washer Thickness | 0.091 INCHES NOMINAL IN |
| Head Height | 0.388 INCHES NOMINAL IN |
| Fastener Length | 3.442 INCHES MINIMUM AND 3.472 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35, TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Thread Length | 0.707 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5758 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.74 INCHES MINIMUM AND 2.76 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 260000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 76924-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HS4243-6-44 | The Boeing Company Div Services (USA) |
| HS4243-6-44 PRIMARY | The Boeing Company (USA) |
NSN 5306-01-615-1387 is a Bolt,machine, manufactured by The Boeing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-615-1387 has 3 manufacturer part numbers on file: 76924-6 (Sps Technologies, Llc Dba PB Fasteners), HS4243-6-44 (The Boeing Company Div Services), HS4243-6-44 (The Boeing Company).
Key specifications for HS4243-6-44: Extended Washer Thickness: 0.091 INCHES NOMINAL IN; Head Height: 0.388 INCHES NOMINAL IN; Fastener Length: 3.442 INCHES MINIMUM AND 3.472 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-35, TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE 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.