This red RS PRO 4 mm terminal post has a castellated top, which increases torque when clamping wires, so it's an excellent choice for connecting wires between power supplies and industrial machinery.

The post works with 4 mm unshrouded plugs, which can be inserted in the top (castellated) hole, or in the cross hole at the side of the post when it's in the open position. The terminal post is insulated, with a reinforced nylon body, and applies outward force to an unsprung cylindrical jack through a metal spring.

When using the cross hole, you can fix a safety bung into the castellated top, which will fit flush and prevent probes and plugs from inserting and making unwanted electrical connections. The post measures 33 mm in length when open (with the cross hole accessible) and 27 mm when closed.

• Red terminal post
• Current rating of 30 A
• Maximum panel thickness of 7 mm
• Made from glass fibre reinforced nylon and polypropylene
• Height above panel of 33 mm when open, 27 mm when closed
• Insulated
• Hole diameter of 4 mm

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards