The Union,pipe, cataloged under National Stock Number 4730-01-538-2037, 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 Desco Manufacturing Company Div Desco Manufacturing Co. Inc.. 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-538-2037 |
| Primary Part Number | 500.264 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Desco Manufacturing Company Div Desco Manufacturing Co. Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREINSERTED BRAZING RING |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET BRAZING RING (PIPE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | UNTHREADED |
| Pipe Wall Thickness Designation for Which Designed | STANDARD ALL ENDS |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 500.264 PRIMARY | Desco Manufacturing Company Div Desco Manufacturing Co. Inc. (USA) |
NSN 4730-01-538-2037 is a Union,pipe, manufactured by Desco Manufacturing Company Div Desco Manufacturing Co. Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-538-2037 has 1 manufacturer part number on file: 500.264 (Desco Manufacturing Company Div Desco Manufacturing Co. Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-733-1421. Verify interchangeability with system specifications before substitution.
Key specifications for 500.264: Furnished Items and Quantity: 2 PREINSERTED BRAZING RING; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: SOCKET BRAZING RING (PIPE) ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS. 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.