Manhole Cover Bolts
Pentagonal head bolts are machined from a tough grade of stainless steel designed for durability when fastening a manhole cover in place.
GMP offers the bolts in two sizes:

3-1/4 in. overall length threaded 5/8" - 11 with countersink chamfer under head.
P/N 84530
Weight: 5.5 oz. (.15 kgs)

1-7/16 in. overall length threaded 1/2" - 13  with flat shoulder under head.
P/N 84531 Weight: 2 oz. (.06 kgs)

Manhole Cover Wrench
Specifically designed for use on Manhole Cover Bolts, this wrench has a pentagonal socket at one end fits over the head of our manhole cover bolts,
and a 3/4 in. (19 mm) hole at the other for use with a rod or hook-end spinning wrench. It's made of heat-treated steel with a zinc-plated finish.

Manhole Cover Wrench
P/N 84540 Weight: 4 oz. (11 kgs)

Manhole Cover Socket Wrench
For those who want to use a powered driver we offer this pentagonal socket wrench that fits any impact tool with a 7/16 in. hex drive.

Manhole Cover Socket Wrench
P/N 01375 Weight: 6 oz. (.2 kgs)