TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download
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TM 9-2320-387-24-2 1 10-56. BODY REPAIR (Cont’d) 6. Blind Rivet Driving Practices and Precautions. (a) Rivets should be inspected for proper installation. The grip length of each rivet is marked on top of its head to provide positive identification. Use of proper grip length will produce a rivet installation where locking collar is flush with top surface of rivet head. Tolerance limit on flushness is 0.02 in. (0.5 mm). (b) For proper rivet installation, it is imperative that holes be properly prepared, tools be in good working order, and rivets properly applied. When problems occur, the source of trouble could be in any of these areas. 7. Blind Rivet Installation. NOTE l Prior to installing blind rivets, the hole must be prepared with the parts aligned and clamped firmly in place. These steps are the same as for solid riveting operations. Proper drill sizes for standard and oversized blind rivets are given in table 10-2. Countersinking dimensions and minimum sheet gauge for countersunk blind rivets are shown in tables 10-3 and 10-4. l It is very important that the proper length rivet is selected for each application. Rivet lengths are sized by the range of material thickness that the rivet will grip. Selecting the proper rivet length is critical because rivets can tolerate only l/16-in. variation in material thickness for each particular rivet length. Rivet grip lengths are called out as a dash number at the end of the manufacturer’s part number. Grip lengths are determined as shown in table 10-5. l For double-dimpled sheets, add countersunk head height to material thickness. l Use rivet installation tool kit for all blind rivets. Table 10-5. Rivet Grip Length Determination. l/8 3116 lI4 5116 318 7116 lf2 9116 518 llJ16 lJ16 l/8 3116 l/4 5116 318 7116 l/2 9116 518 W16 314 1 2 3 4 5 6 ; 9 10 11 12 ,. 1o-95