Lockable Surface Gate Drop Bolt, Black, 140mm Throw, Locks Open or Closed, 40mm+ Gates

A lockable surface drop bolt in black for double gates and any leaf that needs holding at the bottom. It fixes to the face of a gate stile of 40 x 40mm or larger, and it drops a 20mm bolt with a 140mm throw into the ground. Unlike an ordinary drop bolt, this one has a cylinder in the head, so it can be locked in either the open or the closed position and a gate cannot be released by someone reaching over it. It will also work with the same key as your gate lock if you specify a keyed alike cylinder. The black version is the natural match for black painted gates and railings. The height of the bolt adjusts through three positions, so it can be set to your paving on site.

Why this bolt works

Locks both ways. The cylinder locks the bolt up, which keeps it clear of the ground while the gate is in use, and it locks the bolt down, which holds a leaf closed when the site is shut.

Adjustable height. The bolt has three height positions at 50mm steps, giving 100mm of adjustment in total, so you can set the bolt to suit the paving rather than recutting anything.

One key for the gate. A keyed alike barrel lets the same key work the drop bolt and the gate lock, which saves carrying two keys on a busy site.

A strong 20mm bolt. With a 140mm throw and a 20mm bolt, the bolt reaches well into a ground socket, and it uses the same drilling pattern as our standard surface drop bolt, so an existing fixing pattern can be reused.

Where it is used

Double leaf entrance gates, compound gates and yard gates where the second leaf must be held closed and only unlocked by a keyholder. It suits gates of 40 x 40mm section and larger. It needs a ground socket or stop to drop into. Black is a colour choice only, as the bolt and the mechanism are the same across the range.

Specifications

Choosing the right drop bolt

All three lockable versions are mechanically the same, with a 140mm throw and a 20mm bolt, so the choice is colour. If you do not need a lock in the head, the standard surface drop bolt shares the same drilling pattern and is a simple upgrade path later. A keyed alike barrel is available separately if you want the bolt on the same key as a gate lock.

Fitting and care

Hold the bolt against the stile, mark the 15mm holes at 140mm centres and drill the box section, then fit it with the supplied fixings. Close the leaf, lower the bolt and mark the ground position, and fit a ground socket or catcher directly under it. Set the height position last so that the bolt enters the socket without the leaf having to be lifted. Fit the blanking cap over the fixing hole.

Keep the ground socket clear of grit and leaves, and put a drop of lock lubricant in the cylinder at routine maintenance. Touch up any scratched coating promptly.

Frequently asked questions

Ordering and delivery

Order online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.