The Elbow,tube, cataloged under National Stock Number 4730-01-493-8693, 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19 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-493-8693 |
| Item Name | Elbow,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | HEXAGON ALL ENDS |
| Flow Angle | 45.0 DEGREES |
| Surface Treatment Document and Classification | MIL-F-18866 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Style | SWIVEL NUT, DOUBLE (TUBE) FIRST END |
| Seat Nominal Radius | 1.078 INCHES ALL ENDS IN |
| Connection Type | THREADED EXTERNAL TUBE AND THREADED EXTERNAL PIPE ALL ENDS |
| Material Document and Classification | MIL-F-18866 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Leg Length | 1.560 INCHES MINIMUM AND 1.620 INCHES MAXIMUM FIRST END IN |
| Leg Length | 1.970 INCHES MINIMUM AND 2.090 INCHES MAXIMUM SECOND END IN |
| Nominal Thread Size | 1.625 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 1.250 INCHES ALL ENDS IN |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 2A FIRST END A |
| Thread Class | 2B SECOND END |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL OVERALL |
| Thread Series Designator | UN ALL ENDS |
| Nominal Thickness | 1.625 INCHES ALL ENDS 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 |
|---|---|
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
| MS51522 | 5/9 Secondary reference U.S. Government activity |
| MS51522B20Z | 2/2 Government specification standardization U.S. Government activity |
NSN 4730-01-493-8693 is a Elbow,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-500-3561, 4730-01-558-5423, 4730-01-718-9371. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-493-8693: Flange Shape: HEXAGON ALL ENDS; Flow Angle: 45.0 DEGREES; Surface Treatment Document and Classification: MIL-F-18866 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: PLAIN (PIPE) SECOND 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.