The Nipple,pipe, cataloged under National Stock Number 4730-01-163-9989, 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 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-163-9989 |
| Item Name | Nipple,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Nominal Overall Length | 2.000 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | LONG |
| Material Document and Classification | WW-N-351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Specification/standard Data | 81348-WW-N-351 GOVERNMENT SPECIFICATION AND 96906-MS51873 GOVERNMENT STANDARD |
| Nondefinitive Spec/std Data | 3 TYPE |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE XS ALL ENDS |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT 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 |
|---|---|
| WW-N-351 | 4/1 Identification reference U.S. Government activity |
| MS51873 | 5/1 Secondary reference U.S. Government activity |
| MS51873-55 | 2/2 Government specification standardization U.S. Government activity |
NSN 4730-01-163-9989 is a Nipple,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-689-3628, 4730-01-703-1552, 4730-01-703-1810. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-163-9989: Connection Style: PLAIN (PIPE) ALL ENDS; Nominal Overall Length: 2.000 INCHES IN; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: LONG. 12 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.