A great performing low cost miniature PCB mount potentiometer from Alpha, 6.5mm diameter fitting hole, bush and shaft measures 16mm, split shaft measure 8.5mm in length.
Has location lug to prevent turning of the potentiometer once in position, but can be cut off easily if not required.
Large range now available from 1K - 1M
A - Logarithmic (audio taper)
B - Linear
C - Reverse Logarithmic
Price (1off): From £1.65 +vat +p&p