The Thread Piece,union, cataloged under National Stock Number 4730-01-641-8434, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-641-8434 |
| Primary Part Number | 501-7627456 ITEM F-14D4 |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 1.0 INCHES IN |
| Criticality Code Justification | ZZZY |
| Material | COPPER ALLOY 715 |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 501-7627456 ITEM F-14D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-7627456 ITEM F-16D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 501-7627456 ITEM F-14 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 501-7627456 ITEM F-16 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4730-01-641-8434 is a Thread Piece,union, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-641-8434 has 2 manufacturer part numbers on file: 501-7627456 ITEM F-14D4 (Naval Inventory Control Point Mechanicsburg), 501-7627456 ITEM F-16D4 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 501-7627456 ITEM F-14D4: Nominal Pipe Size Designation: 1.0 INCHES IN; Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: INTERFACE EMERGENCY VENT PIPE,DDS CONNECTION,UNION TP; Material: COPPER ALLOY 715. 4 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.