To duplicate this feature, I installed a 1/4" carriage bolt
with a spring under the head.
They are often referred to by the neck as round-head, square-neck carriage bolt
or oval-neck connector bolt.
An impact gun is usually necessary to tighten the carriage bolts
. And after months of wear and tear, sometimes a cutting torch is necessary to remove them.
Before attaching legs to board with wood screws, carriage bolts
must be inserted in holes.
* Carriage Bolts
. Carriage bolts
are large-diameter bolts with rounded heads and square shoulders and are used for connecting structural pieces.
Insert carriage bolt
through 1/4-inch hole, from side without 1 1/8-inch step.
lag screws on the outside edges and 1/4 x 1-in, carriage bolts
through the cabinet bottom on the inside edges.
Bore half-inch-diameter holes through each assembled joint to insert the hot-dipped, galvanized carriage bolts
that will hold everything together.
The iron swing hangers are bolted completely through the swing beams with locking carriage bolts
, while main fort supports use heavy duty bolt and lag screw construction.
4-2" x 5/16" carriage bolts
(to attach and detach seat)
Insert half-inch diameter carriage bolts
through the holes and connect.
However, 200 more new square-head and carriage bolts
were needed to completely rebuild both the press box and power unit.