Honeywell 40003916-048 is a Replacement Head for V Series Zone Valve (V8043F), With End Switch.
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Exact replacement for the actuator that broke on my boiler. Hooked up and worked perfectly once I made a slight frame adjustment.
4 out of 5 stars because one of the two that I bought was not functioning out of the box. The gear on the motor wasn’t meshed fully with the valve gear and they chattered and slipped when operated manually. I found that during manufacturing the frame wasn’t made square, so all I had to do was bend it back just right. It’s been working great for 2 weeks now.
With standard shipping I received these in 1 day so I’m very happy!