The Bolt,machine, cataloged under National Stock Number 5306-01-177-5717, 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 21 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-177-5717 |
| Primary Part Number | HS4243-9-63 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Extended Washer Thickness | 0.133 INCHES NOMINAL IN |
| Head Height | 0.557 INCHES NOMINAL IN |
| Fastener Length | 4.963 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.933 INCHES MINIMUM IN |
| Thread Length | 1.025 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | AMS5758 NATIONAL SPEC ALL MATERIAL RESPONSES OR AMS5844 NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.938 INCHES NOMINAL IN |
| Width Between Flats | 0.703 INCHES MINIMUM IN |
| Grip Diameter | 0.561 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 4.775 INCHES NOMINAL FIRST HOLE IN |
| Hole Type | DRILLED |
| Hole Diameter | 0.141 INCHES NOMINAL 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 |
|---|---|
| HS4243-9-63 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| HS4243-9-63 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 76924-9-63 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HS4243-9-63 PRIMARY | The Boeing Company (USA) |
| HS4243-9-63 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HS4243-9-63 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 76924-9-63 PRIMARY | Lars Industries Inc Dba Mcdonald Technologies Intl Inc (USA) |
| Reference | Meaning |
|---|---|
| HS4243-9-63 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| HS4243-9-53 | 5/9 Secondary reference The Boeing Company |
NSN 5306-01-177-5717 is a Bolt,machine, manufactured by The Boeing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-177-5717 has 7 manufacturer part numbers on file: HS4243-9-63 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), HS4243-9-63 (Sps Technologies, Llc Dba PB Fasteners), 76924-9-63 (Sps Technologies, Llc Dba PB Fasteners), HS4243-9-63 (The Boeing Company), HS4243-9-63 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
Key specifications for HS4243-9-63: Extended Washer Thickness: 0.133 INCHES NOMINAL IN; Head Height: 0.557 INCHES NOMINAL IN; Fastener Length: 4.963 INCHES NOMINAL IN; Extended Washer Diameter: 0.933 INCHES MINIMUM IN. 21 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.