GRIFF clamps are commonly known as pipe brackets, pvc clamps, pipe clamps, tube clamps, or just stauff clamps.
Unlike most manufacturers of this type of clamp, Environmental Marine sells all components separately so you purchase only what you need. The separate components include clamp shell body, cover plate, weld plate, and hexagon head bolts. We recently started stocking a locking plate and stacking bolt. (The locking plate and stacking bolt have yet to be added to our website so just give us a call at 800-522-2656 to order these 2 components.)