Screw locking instructions for Wrekin D400 & E600 manhole covers

The below locking provisions are provided on all Wrekin Tristar, Highway, Unite and Hercules manhole covers.

The cover and frame can be drilled and tapped in 2 locations as shown below.

Screw locking can be provided as a factory fitted item. Please advise our sales team of your requirements at point of order.

Drill through the cover and frame with an appropriate sized drill bit.

Drill through cover with appropriate clearance drill bit.

Tap frame with appropriate hand tap.

Place washer over bolt, apply grease to bolt and lock using appropriate hex key.