The Tailpiece and Nut,union, cataloged under National Stock Number 4730-01-128-2311, 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 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-128-2311 |
| Item Name | Tailpiece and Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| General Characteristics Item Description | C/O UNION NUT,NICKEL COPPER ALLOY,FED SPEC QQ-N-281,0.500 IN. IPS; TAILPIECE,CRES,FED SPEC QQ-S-763,CL 304 COND A,0.250 IN. IPS; AND O-RING,SYNTHETIC RUBBER,MIL-P-25732,MS28775-212; 3000 PSI WP MAX; NOT LEVEL 1 IN |
| 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 |
|---|---|
| 2621-791-03ASSY123 | 3/2 Design control — primary reference U.S. Government activity |
| 501-4686082REVC-F7 | 5/1 Secondary reference U.S. Government activity |
| 2621-791-03 | D/9 Drawing number reference only U.S. Government activity |
| 501-4686092REVB | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2621-791-03ASSY | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
NSN 4730-01-128-2311 is a Tailpiece and Nut,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-128-2311: General Characteristics Item Description: C/O UNION NUT,NICKEL COPPER ALLOY,FED SPEC QQ-N-281,0.500 IN. IPS; TAILPIECE,CRES,FED SPEC QQ-S-763,CL 304 COND A,0.250 IN. IPS; AND O-RING,SYNTHETIC RUBBER,MIL-P-25732,MS28775-212; 3000 PSI WP MAX; NOT LEVEL 1 IN; End Item Identification: PIPING OXYGEN GENERATOR NO. 1. 1 specification is 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.