The Adapter Bushing, cataloged under National Stock Number 4730-01-055-8301, 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 Velan Valve Corp.. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-055-8301 |
| Primary Part Number | 7923-001-052 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Width Across Flats | 3.000 INCHES NOMINAL IN |
| Female End Characteristic | COUNTERBORED AND COUNTERSUNK |
| Counterbore/countersink Location | BOTH ENDS OF INTERNAL THREADS |
| Male End Thread Size | 2-1/2-12 |
| Female End Thread Length | 1.688 INCHES NOMINAL IN |
| Female End Thread Class | 2G G |
| Diameter | 1.000 INCHES NOMINAL FEMALE BUSHING SEGMENTS IN |
| Diameter | 1.000 INCHES NOMINAL MALE BUSHING SEGMENTS IN |
| Male End Thread Direction | RIGHT-HAND |
| Female End Thread Size | 1-5 |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | UN |
| Surface Treatment | PHOSPHATE |
| Chamfer Angle in Deg | 45.0 FEMALE BUSHING SEGMENTS |
| Chamfer Angle in Deg | 45.0 MALE BUSHING SEGMENTS |
| Depth | 0.062 INCHES NOMINAL FEMALE BUSHING SEGMENTS IN |
| Depth | 0.062 INCHES NOMINAL MALE BUSHING SEGMENTS IN |
| Female End Screw Thread Series Designator | ACME G |
| Male End Thread Class | 2A A |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL UNS J03002 |
| Male End Thread Length | 1.188 INCHES NOMINAL IN |
| Thickness | 0.376 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 |
|---|---|
| 7923-001-052 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 7923-1-31 | 5/9 Secondary reference Velan Valve Corp. |
NSN 4730-01-055-8301 is a Adapter Bushing, manufactured by Velan Valve Corp., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-055-8301 has 1 manufacturer part number on file: 7923-001-052 (Velan Valve Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 3120-01-186-7607, 5930-01-511-3462. Verify interchangeability with system specifications before substitution.
Key specifications for 7923-001-052: Width Across Flats: 3.000 INCHES NOMINAL IN; Female End Characteristic: COUNTERBORED AND COUNTERSUNK; Counterbore/countersink Location: BOTH ENDS OF INTERNAL THREADS; Male End Thread Size: 2-1/2-12. 23 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.