The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-01-104-5185, 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 Derbyshire Machine & Tool Co. Government technical data includes 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-104-5185 |
| Primary Part Number | 2621-021-01 ASSY.17 |
| Item Name | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Nominal Overall Length | 2.125 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 20 SECOND END |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNS SECOND END |
| 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 |
|---|---|
| 2621-021-01 ASSY.17 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 2621-021-01 ASSY.17 | 5/2 Secondary reference U.S. Government activity |
| 2621-021-01 | D/9 Drawing number reference only U.S. Government activity |
| 15-97-0192 | 3/2 Design control — primary reference U.S. Government activity |
| 15-97-0186 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-104-5185 is a Adapter,straight,pipe to Boss, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-104-5185 has 1 manufacturer part number on file: 2621-021-01 ASSY.17 (Derbyshire Machine & Tool Co).
Key specifications for 2621-021-01 ASSY.17: Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Nominal Overall Length: 2.125 INCHES IN. 11 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.