5.375 O.D. SHOCK SUB![](http://www.northhoustonmachine.com/NHM_2013/wp-content/uploads/2016/09/NHM_catalog_71-827x1024.jpg)
North Houston Machine, Inc.’s Shock Subs have cushions that are made from high density urethane.
Two units are cushions for upward shock and one for recoil. This prevents metal-to-metal contact.
Connections and diameters are made in about any combination.
Shock subs are made in sizes with replaceable shock elements as follows: 3.50 O.D., 4.0, 4.50, 5.0, 5.50, 5.75, 6.50, 7.0, 7.50, 8.0, 9.0 and 10.0 O.D.
NOTE: Wedgelock connections covered by N.H.M., Inc. U.S. and foreign patent NO. 5,409,324; 5,588,772; 187552; and P94100AU.