The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-576-6486, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Lord Corporation Dba Lord Corp. Government technical data includes 21 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 | 5306-00-576-6486 |
| Primary Part Number | RC27-21 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lord Corporation Dba Lord Corp |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 3.090 INCHES NOMINAL IN |
| Thread Length | 0.550 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.108 INCHES NOMINAL FIRST HOLE IN |
| First Diameter From Head | 0.438 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.297 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 2.540 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.342 INCHES NOMINAL IN |
| Width Between Flats | 0.625 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.141 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 2330 OVERALL |
| Third Diameter From Head | 0.438 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.920 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| RC27-21 PRIMARY | Lord Corporation Dba Lord Corp (USA) |
NSN 5306-00-576-6486 is a Bolt,externally Relieved Body, manufactured by Lord Corporation Dba Lord Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-576-6486 has 1 manufacturer part number on file: RC27-21 (Lord Corporation Dba Lord Corp).
Key specifications for RC27-21: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 3.090 INCHES NOMINAL IN; Thread Length: 0.550 INCHES MINIMUM IN; Shank Unthreaded Hole Diameter: 0.108 INCHES NOMINAL FIRST HOLE 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.