The Bolt,machine, cataloged under National Stock Number 5306-00-685-3370, 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 18 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Bolt,machine |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Necchi Spa (CAGE A1387); Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725) |
| Parameter | Value |
|---|---|
| NSN | 5306-00-685-3370 |
| Primary Part Number | 261892 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Fastener Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.614 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.128 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Width Between Flats | 0.431 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Nonstandard Thread Pitch Diameter | +0.2216 TO 0.2238 INCHES IN |
| Surface Treatment | NICKEL AND CADMIUM OVERALL |
| Minimum Tensile Strength | 142000 POUNDS PER SQUARE INCH LBS |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 601 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 261892 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 261892 | Necchi Spa (ITA) |
| 261892 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 261892 | 5/2 Secondary reference U.S. Government activity |
| 261892 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-685-3370 is a Bolt,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-685-3370 has 3 manufacturer part numbers on file: 261892 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 261892 (Necchi Spa), 261892 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-464-7643. Verify interchangeability with system specifications before substitution.
Key specifications for 261892: Head Height: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Fastener Length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.614 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN. 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.