3-10. RIVET AND BOLT SUBSTITUTION AND REPAIR - CONT
When using a hammer and a chisel, always wear gloves, goggles, and face protection equipment
Chisels will shatter and the fragments may hit you in the eye, face or hand. Clear immediate
work area of other personnel during procedure. In the event of a fragment striking the eye, do
not rub the eye or attempt to remove the foreign particle. Seek immediate first aid.
(3) After drilling is complete, cut off the produced (or squeezed) head using a chisel.
Step (4) is for removal of collars on pin rivets only.
(4) Remove collar from pin rivet by cutting the collar using a chisel.
(5) Punch out the remainder of the rivet.
(6) Install bolt, with plain washer, lock washer between the hex nut and the aluminum or steel
material being held together.
(7) Torque nut (dry) to between 50 and 75 ft-lbs. A minimum of 1/3 in. of the bolt should
protrude through the nut to allow for staking.
(8) Using center-punch or suitable means, stake the nut.
Table 3-2. Suitable Replacement Bolts, Nuts, and Washers for Temporary
Replacement of Rivets.
All fasteners zinc plated. Diameters are after coating.
1/2 in. Flat Washer, MS21306-2,
1/2 in. Solid Flat-Top Countersunk Head
(78), Type 7.
1/2 in. Countersunk Bolt, Cross Recessed,
Grade 8, UNC, Class 2A, ANSI-B-18.5, Zinc
Coated, (length as required).
1/2 in. Extra Duty Helical Spring-Lock
1/2 in. Hex Plain Nut, Grade 8, UNC, Class
2B, ANSI-B18.2.2, Zinc Coated.
3/4 in. Flat Washer, FF-W-92, MS27183-24,
3/4 in. Solid Flat-Top Countersunk Head
(78), Type 7.
Change 2 3-9