The Union,pipe, cataloged under National Stock Number 4730-01-112-3681, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-112-3681 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 PREFORMED PACKING |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Nominal Overall Length | 1.688 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Style Designator | UNTHREADED |
| Material Document and Classification | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Material Document and Classification | QQ-C-390,TYPE 1 AND 3 FED SPEC ALL MATERIAL RESPONSES THREAD PIECE |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | RECESSED |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | COPPER ALLOY NUT |
| Material | COPPER ALLOY 903 OR COPPER ALLOY 922 THREAD PIECE |
| Material | COPPER ALLOY 903 TAILPIECE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 810-1385946PC 1-2-3-6 1/4 IN.IPS | 3/2 Design control — primary reference U.S. Government activity |
| 810-1385946 | D/9 Drawing number reference only U.S. Government activity |
| 810-1385946 ASSY A 1/4 IN.IPS | 5/2 Secondary reference U.S. Government activity |
| 810-1385946 ASSY A | 5/1 Secondary reference U.S. Government activity |
| 15-13-1602 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-1385946 ASS | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-112-3681 is a Union,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-189-9074, 4730-01-189-9075, 4730-01-228-4382. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-112-3681: Furnished Items and Quantity: 1 PREFORMED PACKING; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) ALL ENDS; Nominal Overall Length: 1.688 INCHES IN. 15 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.