Holiday Notice

Since China’s National Day is approaching, we’d like to inform you that we’ll have a seven-day holiday from Oct. 1st to Oct. 7th (GMT+8) during which your question or email may not be replied immediately. However, quotation or orders can be submitted online as usual.

In order not to get your manufacturing efficiency reduced, we strongly suggest you submit quotation or order in advance so that manufacturing can be done or started at least before our public holiday. We’ll be back at your service on Oct 8th.

PCBCart

Countersink vs. Counterbore

PCBs generally need to include screw holes for fixing; as such, special holes, like countersinks and counterbores, are incorporated into the boards to allow them to be fixed in place using different types of screws.

What are the countersinks and counterbores

A countersink is a cone-shaped hole that is cut into the PCB to allow the flat head of a socket cap screw to fit flush with the surface of the board. A counterbore is a cylindrical flat-bottomed hole that is designed to house a hex head or socket head cap screw to be used to secure a PCB board.

The chamber angles that are commonly used for countersinks are 82°, 90° and 100°, while a counterbore has a 0° chamber angle but is vertical.

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