The Bolt,machine, cataloged under National Stock Number 5306-00-273-5524, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Clark-Reliance Llc Dba Jerguson Gage & Valve. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-273-5524 |
| Primary Part Number | P238 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Clark-Reliance Llc Dba Jerguson Gage & Valve |
| Status | ACTIVE |
| Head Height | 0.328 INCHES NOMINAL IN |
| Fastener Length | 4.062 INCHES NOMINAL IN |
| Thread Length | 0.688 INCHES MINIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Features Provided | UNFINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Designator | AS MODIFIED BY MATERIAL,TENSILE STRENGTH,ROCKWELL HARDNESS,HEAD DIM,AND THD LENGTH |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 2 TYPE |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 1050 OR STEEL COMP 1552 OR STEEL COMP 1053 OVERALL |
| 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 |
|---|---|
| P238 PRIMARY | Clark-Reliance Llc Dba Jerguson Gage & Valve (USA) |
| Reference | Meaning |
|---|---|
| E152PC46 | 5/9 Secondary reference Clark-Reliance Llc Dba Jerguson Gage & Valve |
| E139PC46 | 5/9 Secondary reference Clark-Reliance Llc Dba Jerguson Gage & Valve |
| E151PC46 | 5/9 Secondary reference Clark-Reliance Llc Dba Jerguson Gage & Valve |
| E140PC46 | 5/9 Secondary reference Clark-Reliance Llc Dba Jerguson Gage & Valve |
NSN 5306-00-273-5524 is a Bolt,machine, manufactured by Clark-Reliance Llc Dba Jerguson Gage & Valve, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-273-5524 has 1 manufacturer part number on file: P238 (Clark-Reliance Llc Dba Jerguson Gage & Valve).
4 possible matches (shared part number, not a government interchangeability claim): 5910-00-299-2571, 5342-00-823-0611, 5365-01-122-7660. Verify interchangeability with system specifications before substitution.
Key specifications for P238: Head Height: 0.328 INCHES NOMINAL IN; Fastener Length: 4.062 INCHES NOMINAL IN; Thread Length: 0.688 INCHES MINIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL. 17 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.