The Flange,pipe, cataloged under National Stock Number 4730-01-325-9054, 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 16 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-325-9054 |
| Primary Part Number | 2621-228-01 PIECE R176G |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Flange Diameter | 13.125 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Flange Section Style | PLAIN FACE WITH "O" RING |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.688 INCHES NOMINAL IN |
| Neck Height | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-20159,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Unthreaded Reducer Hole Diameter | 3.165 INCHES NOMINAL IN |
| Groove Depth | 0.113 INCHES NOMINAL IN |
| Reducer Flange Hole Type | CONCENTRIC |
| Groove Pitch Diameter | 0.050 INCHES NOMINAL IN |
| Bolt Hole Quantity | 16 |
| Bolt Circle Diameter | 11.625 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Groove Width | 0.193 INCHES NOMINAL IN |
| Thickness | 1.609 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 |
|---|---|
| 2621-228-01 PIECE R176G | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 4685937 | D/9 Drawing number reference only U.S. Government activity |
| 2621-228-01 PIECE R176G | 5/2 Secondary reference U.S. Government activity |
| 4685937 ITEM F20 | 3/2 Design control — primary reference U.S. Government activity |
| 508-4685937 ITEM F20 | 5/9 Secondary reference U.S. Government activity |
| 2621-228-01 | D/9 Drawing number reference only U.S. Government activity |
| 508-4685937 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-325-9054 is a Flange,pipe, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-325-9054 has 1 manufacturer part number on file: 2621-228-01 PIECE R176G (Derbyshire Machine & Tool Co).
Key specifications for 2621-228-01 PIECE R176G: Flange Diameter: 13.125 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Flange Section Style: PLAIN FACE WITH "O" RING; Style Designator: ROUND, ONE BOLT HOLE CIRCLE. 16 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.