The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-441-6221, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-00-441-6221 |
| Primary Part Number | 1WVFR |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division |
| Status | ACTIVE |
| Keyway Depth | 0.1250 INCHES NOMINAL BOTH ENDS IN |
| Securing Method | THREADED HOLE(S) BOTH ENDS |
| Threaded Hole Location | 0.312 IN. FROM CENTER OF HOLE TO END OF HUB 90 DEG APART BOTH ENDS 0.438 IN. FROM CENTER OF HOLE TO END OF HUB 90 DEG APART IN |
| Bore Length | 1.5000 INCHES NOMINAL BOTH ENDS IN |
| Design Type | CLAMPING HUB |
| Keying Facility Type | KEYWAY BOTH ENDS |
| Keying Facility Spacing in Deg | 90.0 BOTH ENDS |
| Features Provided | EXPOSED COUPLING BOLT TYPE |
| Bore Shape | STRAIGHT BOTH ENDS |
| Keying Facility Quantity | 1 BOTH ENDS |
| Threaded Hole Quantity | 4 BOTH ENDS |
| Thread Size Designator | 0.312-18 BOTH ENDS |
| Keyway Width | 0.250 INCHES MINIMUM BOTH ENDS IN |
| Bore Diameter | 1.0005 INCHES NOMINAL BOTH ENDS IN |
| Furnished Items and Quantity | SETSCREWS 4 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1WVFR PRIMARY | Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division (USA) |
| Reference | Meaning |
|---|---|
| SBS-5135 | 5/9 Secondary reference Siemens Energy, Inc. |
| 1 1-4AFS | 5/9 Secondary reference Somerset Engineering Div Midland-Ross Corp |
| 1WVFR | 5/9 Secondary reference Reliance Electric Company Dba Reliance & Dodge Brands |
NSN 3010-00-441-6221 is a Coupling,shaft,flexible, manufactured by Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-441-6221 has 1 manufacturer part number on file: 1WVFR (Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division).
Key specifications for 1WVFR: Keyway Depth: 0.1250 INCHES NOMINAL BOTH ENDS IN; Securing Method: THREADED HOLE(S) BOTH ENDS; Threaded Hole Location: 0.312 IN. FROM CENTER OF HOLE TO END OF HUB 90 DEG APART BOTH ENDS 0.438 IN. FROM CENTER OF HOLE TO END OF HUB 90 DEG APART IN; Bore Length: 1.5000 INCHES NOMINAL BOTH ENDS IN. 15 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.