The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-208-0663, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-208-0663 |
| Primary Part Number | 8858B81 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 3.560 INCHES NOMINAL IN |
| Distance From Centerline to Flat | 0.800 INCHES MINIMUM AND 0.805 INCHES MAXIMUM IN |
| Thread Length | 0.590 INCHES MINIMUM IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.141 INCHES NOMINAL FIRST HOLE IN |
| Style Designator | COUNTERBORE UNTHREADED |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Head Style | DEE CHAMFER |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.880 INCHES NOMINAL IN |
| Shoulder Diameter | 1.389 INCHES MINIMUM AND 1.394 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.812 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM THREADS |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CADMIUM HEAD |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4140 OVERALL |
| Shoulder Length | 2.810 INCHES NOMINAL IN |
| Thread Series Designator | UNS |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.190 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.940 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 |
|---|---|
| 8858B81 PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 8858B81 | 3/9 Design control — primary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 5306-00-208-0663 is a Bolt,internally Relieved Body, manufactured by Goodrich Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-208-0663 has 1 manufacturer part number on file: 8858B81 (Goodrich Corporation).
Key specifications for 8858B81: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 3.560 INCHES NOMINAL IN; Distance From Centerline to Flat: 0.800 INCHES MINIMUM AND 0.805 INCHES MAXIMUM IN; Thread Length: 0.590 INCHES MINIMUM IN. 23 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.