Description

Locknut used in post-war ceramic (Integral) spout applications, does not fit on metal spout versions. Also used on Prewar widespread lavatory valve bodies.  I.D. 1 1/8″, 16 threads per inch.  Crane # F11671.  Made in the USA.

The valve body sealing washers can be found here. 

Locknut for post WW2 metal spouts is #86-550.