The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-953-2379, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 27 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 | 5306-00-953-2379 |
| Primary Part Number | 205364P20 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.434 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Seventh Diameter | 1.730 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 1.510 INCHES NOMINAL IN |
| Head Height | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Sixth Diameter From Head | 0.434 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN |
| Fastener Length | 2.425 INCHES MINIMUM AND 2.435 INCHES MAXIMUM IN |
| Seventh Diameter From Head | 0.358 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN |
| Thread Length | 0.690 INCHES NOMINAL IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.358 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.650 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.820 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.4635 INCHES MINIMUM AND 0.4675 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Sixth Diameter | 1.560 INCHES MINIMUM AND 1.580 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Fifth Diameter From Head | 0.358 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.890 INCHES NOMINAL IN |
| Third Diameter From Head | 0.358 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.750 INCHES MINIMUM AND 0.770 INCHES MAXIMUM 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 |
|---|---|
| 205364P20 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5306-00-953-2379 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-953-2379 has 1 manufacturer part number on file: 205364P20 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 205364P20: Fourth Diameter From Head: 0.434 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN; Distance From Largest Bearing Surface of Head to End of Seventh Diameter: 1.730 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 1.510 INCHES NOMINAL IN; Head Height: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN. 27 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.