The Bolt,machine, cataloged under National Stock Number 5306-00-169-8639, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aircraft Braking Systems Corporation. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-169-8639 |
| Primary Part Number | GYS187-68W |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Meggitt Aircraft Braking Systems Corporation |
| Status | ACTIVE |
| Fastener Length | 5.062 INCHES NOMINAL IN |
| Thread Length | 0.812 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Features Provided | FINISHED HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 4.250 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| GYS187-68W | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| GYS187-68W PRIMARY | Meggitt Aircraft Braking Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| GYS187-68W | 5/9 Secondary reference Goodyear Tire and Rubber Co the |
| GYS187-68W | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-169-8639 is a Bolt,machine, manufactured by Meggitt Aircraft Braking Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-169-8639 has 2 manufacturer part numbers on file: GYS187-68W (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), GYS187-68W (Meggitt Aircraft Braking Systems Corporation).
Key specifications for GYS187-68W: Fastener Length: 5.062 INCHES NOMINAL IN; Thread Length: 0.812 INCHES MINIMUM IN; Nominal Thread Diameter: 0.438 INCHES IN; Features Provided: FINISHED HEAD. 11 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.