The Adapter Bushing, cataloged under National Stock Number 4730-01-057-6935, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4730-01-057-6935 |
| Primary Part Number | 2621-925-11ASSY1APC10 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Male End Thread Pitch Diameters | +0.6898 TO 0.8125 INCHES IN |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Female End Characteristic | COUNTERSUNK |
| Counterbore/countersink Location | EXTERNALLY THREADED END |
| Male End Thread Size | 13/16-14 |
| Female End Thread Length | 0.906 INCHES NOMINAL IN |
| Female End Thread Class | 2B |
| Diameter | 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Male End Thread Direction | LEFT-HAND |
| Female End Thread Size | 7/16-12 |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | NS-2 |
| Chamfer Angle in Deg | 45.0 LOCATION NOT OTHERWISE SPECIFIED |
| Depth | 0.100 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Female End Screw Thread Series Designator | ACME |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL CORROSION RESISTING |
| Male End Thread Length | 0.312 INCHES MINIMUM IN |
| Thickness | 0.300 INCHES NOMINAL 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 |
|---|---|
| 2621-925-11ASSY1APC10 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| F26527REVE PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| F26527REVC | 5/9 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 2621-925-11ASSY1APC10 | 5/9 Secondary reference U.S. Government activity |
| 2621-925-11 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-057-6935 is a Adapter Bushing, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-057-6935 has 2 manufacturer part numbers on file: 2621-925-11ASSY1APC10 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), F26527REVE (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-057-7297. Verify interchangeability with system specifications before substitution.
Key specifications for 2621-925-11ASSY1APC10: Male End Thread Pitch Diameters: +0.6898 TO 0.8125 INCHES IN; Width Across Flats: 1.000 INCHES NOMINAL IN; Female End Characteristic: COUNTERSUNK; Counterbore/countersink Location: EXTERNALLY THREADED END. 19 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.