The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-558-7277, 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 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-558-7277 |
| Primary Part Number | 309596 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.130 INCHES NOMINAL IN |
| Head Height | 0.153 INCHES NOMINAL IN |
| Fastener Length | 5.330 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.625 INCHES NOMINAL IN |
| Thread Length | 0.600 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5625 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.497 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 4.405 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 4.730 INCHES NOMINAL IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.419 INCHES NOMINAL IN |
| Width Between Flats | 0.558 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.425 INCHES NOMINAL IN |
| Nonstandard Thread Pitch Diameter | +0.4613 TO 0.4645 INCHES IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | NICKEL AND CADMIUM OVERALL |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Third Diameter From Head | 0.500 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 309596 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 309596 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 309596 | 5/2 Secondary reference U.S. Government activity |
| 309596 | 5/9 Secondary reference Valco Co Government Sales Office |
NSN 5306-00-558-7277 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-558-7277 has 2 manufacturer part numbers on file: 309596 (Sps Technologies, Llc Dba PB Fasteners), 309596 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 309596: Extended Washer Thickness: 0.130 INCHES NOMINAL IN; Head Height: 0.153 INCHES NOMINAL IN; Fastener Length: 5.330 INCHES NOMINAL IN; Extended Washer Diameter: 0.625 INCHES NOMINAL IN. 22 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.