The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-01-090-2903, 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 Bmi Industries Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-090-2903 |
| Primary Part Number | 2621-021-01ASSY22 |
| Item Name | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bmi Industries Inc |
| Status | ACTIVE |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Nominal Overall Length | 3.937 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 16 SECOND END |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UN SECOND END |
| Thread Series Designator | NPT FIRST 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 |
|---|---|
| 2621-021-01ASSY22 | Bmi Industries Inc (USA) |
| 2621-021-01ASSY22 | Guill Tool & Engineering Co Inc Div Guill Defense (USA) |
| Reference | Meaning |
|---|---|
| 262102101-022 | 5/2 Secondary reference U.S. Government activity |
| 2621-021-01ASSY22 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-021-01 | D/9 Drawing number reference only U.S. Government activity |
| 2621-021-01ASSY22 | 5/9 Secondary reference Nucraloy Corp |
NSN 4730-01-090-2903 is a Adapter,straight,pipe to Boss, manufactured by Bmi Industries Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-090-2903 has 2 manufacturer part numbers on file: 2621-021-01ASSY22 (Bmi Industries Inc), 2621-021-01ASSY22 (Guill Tool & Engineering Co Inc Div Guill Defense).
Key specifications for 2621-021-01ASSY22: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Nominal Overall Length: 3.937 INCHES IN; Connection Type: THREADED EXTERNAL BOSS SECOND END. 13 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.