Report Review for product Socket - 8 Pin Octal, Saddle Plate, Black, Bottom Mount

If you plan on using these with 6550s and mounting them with screws then check dimensional clearances closely.

When mounted in a Leslie amplifier chassis (0.050" thick) from the bottom, the top of the socket is only 0.030" above the top surface of the chassis. If #4-40 screws are used to mount a socket, they will prevent complete insertion of a 6550 due to interference with its wide base. Once inserted the tube can be rocked from side-to-side slightly on the socket mounting screws.

The max head height of a #4-40 pan head screw is nominally 0.080". If used with a washer add 0.025"-0.040". I used a truss head screw (0.070" max height) with no washer. There is still interference.