The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-179-5902, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-179-5902 |
| Primary Part Number | 1881-87 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.200 INCHES NOMINAL IN |
| Fastener Length | 5.500 INCHES NOMINAL IN |
| Thread Length | 0.660 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-8844,CLASS 3,300M MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS CHAMFERED |
| Thread Direction | RIGHT-HAND |
| Grip Length | 4.840 INCHES NOMINAL IN |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Grip Diameter | 0.4980 INCHES MINIMUM AND 0.4990 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL UNS K44220 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.875 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 |
|---|---|
| 1881-87 PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1881-87 | 5/9 Secondary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 5306-01-179-5902 is a Bolt,close Tolerance, manufactured by Goodrich Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-179-5902 has 1 manufacturer part number on file: 1881-87 (Goodrich Corporation).
Key specifications for 1881-87: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.200 INCHES NOMINAL IN; Fastener Length: 5.500 INCHES NOMINAL IN. 18 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.