The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-159-6571, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-159-6571 |
| Primary Part Number | W-142243 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Head Height | 0.688 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Fastener Length | 5.097 INCHES MINIMUM AND 5.315 INCHES MAXIMUM IN |
| Thread Length | 0.938 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN |
| Hole Configuration Style | HEXAGON FLATS |
| First Diameter From Head | 0.767 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.248 INCHES MINIMUM AND 1.372 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 4.128 INCHES MINIMUM AND 5.120 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 3 |
| Material | STEEL OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.063 INCHES MINIMUM AND 0.187 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 |
|---|---|
| W-142243 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| W-142243 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| W-142243 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-159-6571 is a Bolt,externally Relieved Body, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-159-6571 has 1 manufacturer part number on file: W-142243 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for W-142243: Head Height: 0.688 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN; Fastener Length: 5.097 INCHES MINIMUM AND 5.315 INCHES MAXIMUM IN; Thread Length: 0.938 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN; Hole Configuration Style: HEXAGON FLATS. 18 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.