The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-01-273-5612, 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 Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings (FSG 47) |
| Manufacturers | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling (CAGE 04627); Kyb Corporation (CAGE J1620) |
| Parameter | Value |
|---|---|
| NSN | 4730-01-273-5612 |
| Primary Part Number | 321791 |
| Item Name | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 321791 PRIMARY | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling (USA) |
| 20931-70302 | Kyb Corporation (JPN) |
| Reference | Meaning |
|---|---|
| 321791 | 5/9 Secondary reference Hyster-Yale Group, Inc. |
| 20931-70302 | 5/9 Secondary reference Kayaba Industry Co. Ltd |
NSN 4730-01-273-5612 is a Adapter,straight,pipe to Boss, manufactured by Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-273-5612 has 2 manufacturer part numbers on file: 321791 (Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling), 20931-70302 (Kyb Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5430-01-665-6808. Verify interchangeability with system specifications before substitution.
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.