ARP Fasteners 300-8245 Rocker Arm Nut
by ARP
Sale
$173.57
$111.86
Exclusive 12 Point Head Heat Treated Premium Grade A 8740 Chrome Moly Steel Rated At 190 000 PSI Tensile Strength Precision Machined Threads Locking Set Screw Ground Flush With Rocker Arm Stud Doesnt Require Special Tools Limited 90 Day Warranty
Specifications
Compatibility - Aluminum Rocker
Style - Perma-Loc
Length (IN) - 1.2 Inch
Thread Size - 7/16-2 Inch
Body Diameter (IN) - 0.55 Inch
Head Style - 12-Point
Includes Set Screw - Yes
Quantity - Set Of 16
ARP has the missing link in valve train reliability. A rocker arm adjuster that wont loosen! One of the more aggravating things found in many high performance engines is constantly having to re-adjust rocker arms. Until ARP introduced the patented Perma-Loc adjuster there wasnt a poly lock on the market that you didnt have to continually tighten. There are several important reasons why ARPs exclusive Perma-Loc rocker arm adjusters wont loosen like others. First the adjuster body is heat treated all the way through (not just case hardened). This eliminates the thread movement common to others. Secondly the threads are machined exactly perpendicular to the bottom of the adjuster so it seats evenly and applies pressure on a full 360 Degree circle. Lastly the set screw is machined flush on the bottom (not pointed) so it will have optimum contact on the rocker arm stud. Youll find ARP Perma-Locs easy to use too. The compact 12 point head is designed to hold your wrench in position while you lock the set screw with an Allen wrench. All in all theyre the best you can buy!
