The Nipple,tube, cataloged under National Stock Number 4730-01-256-3128, 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 8 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-256-3128 |
| Item Name | Nipple,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 1.370 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | FLARED W/ CENTER WRENCHING FACILITY |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Thread Class | 2A ALL ENDS A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| 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 |
|---|---|
| MS51519B4 | 2/2 Government specification standardization U.S. Government activity |
| 4LHTX-S | 5/1 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| 3855655 | 5/1 Secondary reference Oshkosh Defense Llc |
| MIL-DTL-18866 | 5/9 Secondary reference U.S. Government activity |
| 4LHTX-S | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
NSN 4730-01-256-3128 is a Nipple,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-256-3128: Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.370 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Style Designator: FLARED W/ CENTER WRENCHING FACILITY. 8 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.