The Union,pipe, cataloged under National Stock Number 4730-01-421-3430, 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 Bec Systems Llc Dba Bec Machine Products. Government technical data includes 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-421-3430 |
| Primary Part Number | 018341-FI/BV |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bec Systems Llc Dba Bec Machine Products |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| 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 |
|---|---|
| 018341-FI/BV | Bec Systems Llc Dba Bec Machine Products (USA) |
| Reference | Meaning |
|---|---|
| 77301040 | 3/9 Design control — primary reference W & O Supply Inc |
| 77301040 1/4 INCH SW | 5/9 Secondary reference W & O Supply Inc |
| 77301040 1/4 IN | C/1 Advisory reference — outside the item-of-supply concept W & O Supply Inc |
| 47950-04 | 5/9 Secondary reference Nucraloy Corp |
| 77301040 70/30 CUNI | 5/9 Secondary reference W & O Supply Inc |
NSN 4730-01-421-3430 is a Union,pipe, manufactured by Bec Systems Llc Dba Bec Machine Products, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-421-3430 has 1 manufacturer part number on file: 018341-FI/BV (Bec Systems Llc Dba Bec Machine Products).
Key specifications for 018341-FI/BV: Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Special Features: 0-RING RETAINING RING INCLUDED;O-RING MATERIAL IS MIL-R-83248 AND MIL-R-93248/1CLASS 1 RUBBER, RETAINING RING 7-/30 CUNI; Material: COPPER ALLOY OVERALL. 3 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.