The Elbow,pipe to Boss, cataloged under National Stock Number 4730-01-194-1981, 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 19 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-194-1981 |
| Item Name | Elbow,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING |
| Flow Angle | 90.0 DEGREES |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | SOCKET W/ GROVE (PIPE) FIRST END |
| Connection Style | DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | ASTM A-234 ASSN STD SINGLE MATERIAL RESPONSE ELBOW |
| Material Document and Classification | ASTM A-234 ASSN STD SINGLE MATERIAL RESPONSE TAILPIECE |
| Leg Length | 0.940 INCHES NOMINAL SECOND END IN |
| Leg Length | 2.440 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 1.187 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL ELBOW |
| Material | NICKEL ALLOY NUT |
| Material | STEEL TAILPIECE |
| Thread Series Designator | UN SECOND END |
| 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 |
|---|---|
| 2445103-0420 | 5/2 Secondary reference U.S. Government activity |
| 2632-500X01 ITEM 420 | 5/2 Secondary reference U.S. Government activity |
| 2445110 | 5/9 Secondary reference U.S. Government activity |
| 2632-500X01 SHEET NO. 316 | 5/9 Secondary reference U.S. Government activity |
| 2632-500X01 | D/9 Drawing number reference only U.S. Government activity |
| 2445110-0420 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-194-1981 is a Elbow,pipe to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-261-2507. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-194-1981: Furnished Items and Quantity: 2 PREFORMED PACKING; Flow Angle: 90.0 DEGREES; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: SOCKET W/ GROVE (PIPE) FIRST END. 19 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.