Figure 4-102.  CherryMax $^{®}$ installation procedure. Figure 4-103.  CherryMAX $^{®}$  rivet. 1 2 3 4 The CherryMAX ®  rivet is  inserted into the prepared  hole. The pulling head  (installation tool) is slipped  over the rivet’s stem.  Applying a firm, steady  pressure, which seats the  rivet head, the installation  tool is then actuated. The pulling head holds the  rivet sleeve in place as it  begins to pull the rivet stem  into the rivet sleeve. This  pulling action causes the  stem shear ring to upset the  rivet sleeve and form the  bulbed blind head. The continued pulling action of  the installation tool causes the  stem shear ring to shear from  the main body of the stem as  the stem continues to move  through the rivet sleeve. This  action allows the fastener to  accommodate a minimum of  $^{1}$/16" variation in structure  thickness. The locking collar  then contacts the driving anvil.  As the stem continues to be  pulled by the action of the  installation tool, the Safe-Lock  locking collar deforms into the  rivet sleeve head recess. The safe-lock locking collar  fills the rivet sleeve head  recess, locking the stem and  rivet sleeve securely together.  Continued pulling by the  installation tool causes the  stem to fracture at the break  notch, providing a flush,  burr-free, inspectable  installation. Bulbed blind head Pulling stem Driving anvil Rivet sleeve Safe-lock locking collar hydraulic G704B or G747 CherryMAX$^{®}$ power tools. For  installation, please refer to  Figure 4-102 .  The CherryMAX$^{®}$ mechanical-lock blind rivet is popular  with general aviation repair shops because it features the  one tool concept to install three standard rivet diameters and  their oversize counterparts.  [Figure 4-103]  CherryMAX$^{®}$  rivets are available in four nominal diameters:  1 ⁄ 8,  5 ⁄ 32,  3 ⁄ 16, and  1 ⁄ 4-inch and three oversized diameters and four head styles:  universal, 100° flush head, 120° flush head, and NAS1097  flush head. This rivet consists of a blind header, hollow rivet  shell, locking (foil) collar, driving anvil, and pulling stem  complete with wrapped locking collar. The rivet sleeve and  4-49