TM-10-5411-205-13 HMMWV S-250/G Shelter Operator, Unit and Direct Support Download
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TM 10-5411-205-13 3-9. General Repair Procedures (cont). (a) Determine thread size, grip range, style, and material of rivnut to be used. Grip length equals combined thickness of materials being fastened togeth- er. Grip range of rivnuts must encompass grip length. WARNING Drilling creates metal chips which may enter eyes and cause seri- ous injury. Eye protection is required. CAUTION Do not drill deeper than necessary to install rivet as you may drill through other side of panel. NOTE Drill hole size must match size of rivnut being installed. Quan- tities of sheets may be drilled at the same time when with sheet fasteners. (b) (c) (d) (e) (f) (g) (h) (i) Drill hole in structure. Remove all metal chips and remove burrs from If a countersunk head rivnut is being installed, 100-degree machine countersink. held ‘together drilled holes. countersink hole using a Thread stem of appropriate pullup stud into rivnut. Stud should protrude through open end rivnuts, or be 1-1/2 threads from bottoming in closed end rivnuts. Coat rivnut body with sealer before installing. Insert rivnut in hole. Make sure sheets are held pulling. tightly together before With pullup stud parallel to axis of rivnut, pull up on rivnut. Exert firm pressure but do not bend or buckle metal sheets. Make sure fastened parts are not loose, rivnut does not rotate and rivnut head is seated tightly against surface. Make sure rivnut threads are in good condition. If threads are damaged or rivnut is improperly installed, remove it and install a new one. 3-18