The Union,pipe, cataloged under National Stock Number 4730-01-167-2781, 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 Mcmaster-Carr Supply Co. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-167-2781 |
| Primary Part Number | 4452K231 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Nominal Overall Length | 3.128 INCHES IN |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Style Designator | THREADED |
| Seat Type | GROOVED |
| Nominal Thread Size | 2.000 INCHES FIRST END IN |
| Material | STEEL COMP 316 OVERALL |
| 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 |
|---|---|
| 4452K231 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 4825K19 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
| 2IN 36115 316 | 3/9 Design control — primary reference Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy |
NSN 4730-01-167-2781 is a Union,pipe, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-167-2781 has 1 manufacturer part number on file: 4452K231 (Mcmaster-Carr Supply Co).
Key specifications for 4452K231: Connection Style: PLAIN (PIPE) ALL ENDS; Nominal Overall Length: 3.128 INCHES IN; Connection Type: THREADED INTERNAL PIPE FIRST END; Style Designator: THREADED. 8 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.