The Union,pipe, cataloged under National Stock Number 4730-01-090-4189, 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 11 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-090-4189 |
| Primary Part Number | 516-5486653 FN 3L1 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Nominal Overall Length | 6.313 INCHES IN |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Material Document and Classification | QQ-N-281,CL A,HOT FINISH FED SPEC SINGLE MATERIAL RESPONSE THREAD PIECE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | RECESSED |
| Material | NICKEL ALLOY NUT |
| Material | COPPER ALLOY TAILPIECE |
| Material | COPPER ALLOY THREAD PIECE |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| 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 |
|---|---|
| 516-5486653 FN 3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2621-791-03ASSY46AL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 15-97-5383L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 516-5486653 ITEM F3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 516-5343917 ITEM F3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2621-791-03ASSY46A | 3/1 Design control — primary reference U.S. Government activity |
| 516-5486653 ITEM F3 | 5/1 Secondary reference Naval Sea Systems Command |
| 516-5486653 FN 3 | 5/1 Secondary reference Naval Sea Systems Command |
| 15-97-5383 | 5/1 Secondary reference U.S. Government activity |
| 516-5343917 ITEM F3 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4730-01-090-4189 is a Union,pipe, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-090-4189 has 5 manufacturer part numbers on file: 516-5486653 FN 3L1 (Naval Inventory Control Point Mechanicsburg), 2621-791-03ASSY46AL1 (Naval Inventory Control Point Mechanicsburg), 15-97-5383L1 (Naval Inventory Control Point Mechanicsburg), 516-5486653 ITEM F3L1 (Naval Inventory Control Point Mechanicsburg), 516-5343917 ITEM F3L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 516-5486653 FN 3L1: Nominal Overall Length: 6.313 INCHES IN; Criticality Code Justification: ZZZY; Material Document and Classification: MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE NUT; Material Document and Classification: MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE. 11 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.