The Adapter Bushing, cataloged under National Stock Number 4730-00-868-1607, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-868-1607 |
| Primary Part Number | S1615-20218-1 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Width Across Flats | 1.053 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Male End Thread Size | 0.750-16 |
| Female End Thread Length | 0.655 INCHES NOMINAL IN |
| Female End Thread Class | 2B |
| Male End Thread Direction | RIGHT-HAND |
| Female End Thread Size | 0.500-20 |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | UNF |
| Surface Treatment | CADMIUM |
| Female End Screw Thread Series Designator | UNF |
| Male End Thread Class | 3A A |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL COMP 4130 |
| Male End Thread Length | 0.405 INCHES NOMINAL IN |
| Thickness | 0.240 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 |
|---|---|
| S1615-20218-1 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| S1615-20218-1 | Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc (USA) |
| S1615-20218-1 | W and G Machine Company, Incorporated (USA) |
| S1615-20218-1 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| S1615-20218-1 | E O Manufacturing Company, Inc. (USA) |
NSN 4730-00-868-1607 is a Adapter Bushing, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-868-1607 has 5 manufacturer part numbers on file: S1615-20218-1 (Leonardo Spa Helicopters Division - Production Site), S1615-20218-1 (Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc), S1615-20218-1 (W and G Machine Company, Incorporated), S1615-20218-1 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), S1615-20218-1 (E O Manufacturing Company, Inc.).
Key specifications for S1615-20218-1: Width Across Flats: 1.053 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN; Male End Thread Size: 0.750-16; Female End Thread Length: 0.655 INCHES NOMINAL IN; Female End Thread Class: 2B. 15 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.