The Bolt,machine, cataloged under National Stock Number 5306-01-177-5716, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-177-5716 |
| Primary Part Number | HS4243-10-103 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Extended Washer Thickness | 0.150 INCHES NOMINAL IN |
| Head Height | 0.615 INCHES NOMINAL IN |
| Fastener Length | 7.777 INCHES NOMINAL IN |
| Extended Washer Diameter | 1.040 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN |
| Thread Length | 1.152 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 | 0.625 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 6.625 INCHES NOMINAL IN |
| Width Between Flats | 0.775 INCHES MINIMUM IN |
| Grip Diameter | 0.672 INCHES MINIMUM AND 0.687 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 | 7.589 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 |
|---|---|
| HS4243-10-103 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HS4243-10-103 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| HS4243-10-103 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 76924-10-103 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HS4243-10-103 | 7/2 Vendor item drawing reference The Boeing Company |
| HS4243-10-103 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| HS4243-10-103 | 5/9 Secondary reference Mecair Aerospace Industries,subsidiary of Spstechnologiesdiv Division of Sps Technologiesdba Mecair Inc. Div Division of Sps Technologies |
NSN 5306-01-177-5716 is a Bolt,machine, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-177-5716 has 4 manufacturer part numbers on file: HS4243-10-103 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HS4243-10-103 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), HS4243-10-103 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), 76924-10-103 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for HS4243-10-103: Extended Washer Thickness: 0.150 INCHES NOMINAL IN; Head Height: 0.615 INCHES NOMINAL IN; Fastener Length: 7.777 INCHES NOMINAL IN; Extended Washer Diameter: 1.040 INCHES MINIMUM AND 1.050 INCHES MAXIMUM 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.