Hello Robmerch,
The Lockshield provided with this product is not designed to fit directly onto the radiator, it is designed for use with a radiator valve tail.
We do currently stock a TRV and lockshield that is designed to fit directly onto the radiator, this is the: White / Chrome Angled TRV with Lockshield 15mm x ½" (31811).
Thank you for using Q&A. (LM).
Answered by: LMac
Date published: 2018-04-25