The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-166-4539, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Plc Div Defense (europe). 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 | 5306-01-166-4539 |
| Primary Part Number | BLT4613 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rolls-Royce Plc Div Defense (europe) |
| Status | ACTIVE |
| Head Height | 0.140 INCHES MINIMUM IN |
| Fastener Length | 2.070 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | DTD 939,FSCM K0378 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Material Document and Classification | HR 650,FSCM K0378 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.246 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.956 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Width Between Flats | 0.491 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.180 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Surface Treatment | SILVER OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| BLT4613 PRIMARY | Rolls-Royce Plc Div Defense (europe) (GBR) |
NSN 5306-01-166-4539 is a Bolt,externally Relieved Body, manufactured by Rolls-Royce Plc Div Defense (europe), classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-166-4539 has 1 manufacturer part number on file: BLT4613 (Rolls-Royce Plc Div Defense (europe)).
Key specifications for BLT4613: Head Height: 0.140 INCHES MINIMUM IN; Fastener Length: 2.070 INCHES NOMINAL IN; Surface Treatment Document and Classification: DTD 939,FSCM K0378 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.750 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.