Hole Size Information

Each item that has, or can have, a connector loaded and each connector that can be loaded has hole size information.

Why do we list hole sizes for fully assembled items?

This will matter if you are building your own item, or you may need to alter your purchased item in the future.

For Instance:
3.5mm bulkheads are manufactured 2 different ways - one fits a 1/2"D hole and the other fits a 3/8" round hole.
BNC Bulkheads are only manufactured to fit a 1/2" D hole.

So if your immediate, or future, need is to have a patch panel with some 3.5mm bulkheads and some
BNC bulkheads - the hole size information on our website would let you know that you'd have to purchase
a panel that has 1/2" D holes as that is the only common hole size between both 3.5mm & BNC bulkheads.

For a master list of Panel Mount Connectors and what hole sizes they fit in - click HERE.

Hole size notes for various connectors

a 1/4" D connector - will fit a 1/4" D or 1/4" Round Hole
a 1/4" Double D connector - will fit a 1/4" D, 1/4" Double D, or 1/4" Round Hole
a 1/4" Round connector - will fit a 1/4" Round Hole
a 3/8" D connector - will fit a 3/8" D or 3/8" Round Hole
a 3/8" Double D connector - will fit a 3/8" D, 3/8" Double D, or 3/8" Round Hole
a 3/8" Round connector - will fit a 3/8" Round Hole
a 1/2" D connector - will fit a 1/2" D or 1/2" Round Hole
a 5/8" D connector - will fit a 5/8" D or 5/8" Round Hole
a 5/8" Double D connector - will fit a 5/8" D, 5/8" Double D, or 5/8" Round Hole
a Neutrik D-Series is equivalent to a Switchcraft E-Series

The D or Double D shape of a connector, or hole, is to prevent the connector from spinning.

Hole Specs

1/2" D

1/4" D

1/4" Round

3/4" D

3/8" D

3/8" Round

5/8" D

DB9/HD15

DB15

DB25

DB37

Keystone

Neutrik Din

Speaker
(Mounting Holes are tapped 4-40)

XLR D-Series


XLR D-Series
(Non-Tapped for Face Plates)

G-Series