* 72, 73 and 74 Series Service Kits Contain 2 O-Rings.
72 Series Quickclamp
Tighten 72 Series Screw w/ a 3 mm Hex Wrench or a T1 Torx Wrench.
72 Series Service Kit (Contains 2 O-Rings)
73 / 74 Series Quickclamp
Tighten 73/74 Series Screw w/ a 5/32" Hex or a T25 Torx Wrench.
73/74 Series Service Kit (Contains 2 O-Rings)
https://catalogs.jhf.com/Pneumatic-and-Hydraulic-Equipment/722/