The Tailpiece,union, cataloged under National Stock Number 4730-01-337-7634, 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 2 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-337-7634 |
| Primary Part Number | 2109895 PIECE 3L1 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2109895 PIECE 3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2640-742 PIECE 3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 845-2109895 PIECE 3L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-742 ITEM 7L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 845-2109895 PIECE 3 | 3/1 Design control — primary reference U.S. Government activity |
| 2640-742 PIECE 3 | 5/1 Secondary reference Naval Sea Systems Command |
| 2641-742 ITEM 7 | 5/1 Secondary reference Naval Sea Systems Command |
| 2109895 PIECE 3 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4730-01-337-7634 is a Tailpiece,union, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-337-7634 has 4 manufacturer part numbers on file: 2109895 PIECE 3L1 (Naval Inventory Control Point Mechanicsburg), 2640-742 PIECE 3L1 (Naval Inventory Control Point Mechanicsburg), 845-2109895 PIECE 3L1 (Naval Inventory Control Point Mechanicsburg), 2641-742 ITEM 7L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 2109895 PIECE 3L1: Criticality Code Justification: ZZZY; End Item Identification: BALL VALVE; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 2 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.
NSN 4730-01-337-7634 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.