The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-125-4135, 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 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-125-4135 |
| Primary Part Number | GYS5N53 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Meggitt Aircraft Braking Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.180 INCHES NOMINAL IN |
| Point Length | 0.050 INCHES NOMINAL IN |
| Fastener Length | 4.015 INCHES NOMINAL IN |
| Thread Length | 0.571 INCHES NOMINAL IN |
| Material Document and Classification | MIL-B-117 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Point Chamfer Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.154 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 0.339 INCHES NOMINAL IN |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Grip Diameter | 0.250 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | NICKEL OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| GYS5N53 PRIMARY | Meggitt Aircraft Braking Systems Corporation (USA) |
NSN 5306-01-125-4135 is a Bolt,close Tolerance, manufactured by Meggitt Aircraft Braking Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-125-4135 has 1 manufacturer part number on file: GYS5N53 (Meggitt Aircraft Braking Systems Corporation).
Key specifications for GYS5N53: Head Height: 0.180 INCHES NOMINAL IN; Point Length: 0.050 INCHES NOMINAL IN; Fastener Length: 4.015 INCHES NOMINAL IN; Thread Length: 0.571 INCHES NOMINAL IN. 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.