Tool engages lockbolt pintail Gap closes, collar swage begins Pintail fractures at the break notch Tool anvil reverses off swaged collar Installation complete Swage process complete 1 2 3 4 5 6 Figure 7-80.  Huck-Spin ® installation sequence. Figure 7-81.  Eddie-Bolts ® . The Accu-Lok$^{™}$ Blind Fastening System is designed  specifically for use in composite structures in which access  is limited to one side of the structure. It combines high joint  preload with a large diameter footprint on the blind side.  The large footprint enables distribution of the joint preload  over a larger area, virtually eliminating the possibility of  delaminating the composite structure. The shear strength of  the Accu-Lok$^{™}$ is 95 KSI, and it is available in 100° flush  head, 130° flush head, and protruding head styles. A similar  fastener designed by Monogram is called the Radial-Lok$^{®}$.  [Figure 7-84] The Cherry Maxibolt$^{®}$ is availabl e in titanium for  compatibility with composite structures. The shear strength  of the Maxibolt$^{®}$ is 95 KSI. It can be installed from one side  with a G-83 or equivalent  pneumatic-hydraulic installation  tool, and is available in 100° flush head, 130° flush head and  protruding head styles.  [Figure 7-83] The Alcoa UAB ™ blind bolt system is designed for composite  structures and is available in titanium and stainless steel. The  UAB$^{™}$ blind bolt system is available in  100° flush head, 130°  flush head, and protruding head styles. The fiberlite fastening system uses composite materials for a  wide range of aerospace hardware. The strength of fiberlite  fasteners is equivalent to aluminum at two-thirds the weight.  The composite fastener provides good material compatibility  with carbon fiber and fiberglass. The use of screws and nutplates in place of Hi-Loks$^{®}$ or  blind fasteners is recommended if a panel must be removed  periodically for maintenance. Nutplates used in composite  structures usually require three holes: two for attachment  of the nutplate and one for the removable screw, although  rivetless nut plates and adhesive bonded nutplates are  available that do not require drilling and countersinking two  extra holes. Fiberlite Screws and Nutplates in Composite Structures Blind Bolts  7-48