ARP 300-8249 Perma-Loc Rocker Arm Nuts, 7/16 in. Thread, Stud Girdle, Set of 16
$$228.91Fasteners, Hardware and Mounts \ Rocker Arm Locks Nuts, & Studs \ Rocker Arm Lock Nuts300-8249
ARP300-8249
ARP 300-8249 Perma-Loc Rocker Arm Nuts, 7/16 in. Thread, Stud Girdle, Set of 16
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 wasn?t a 'poly lock' on the market that you didn't have to continually tighten. There are several important reasons why ARP's exclusive Perma-Loc rocker arm adjusters ...
ARP300-8249 Perma-Loc Rocker Arm Nuts, 7/16 in. Threa

ARP

ARP 300-8249 Perma-Loc Rocker Arm Nuts, 7/16 in. Thread, Stud Girdle, Set of 16

$228.91

Item #: ARP300-8249

Mfg Part #: 300-8249

UPC #: 672036012137

Applies To Continental U.S. orders only

Out Of Stock

Specifications
Rocker Arm Nuts Specifications
Rocker Arm Style
Full roller
Rocker Arm Nut Style
Polylock
Rocker Stud Thread Diameter
7/16-20 in.
Minimum Rocker Slot Width
0.560 in.
Overall Height (in.)
2.050 in. and 2.615 in.
Shank Diameter (in.)
0.560 in.
For Use with Stud Girdle
Yes
Quantity
Sold as a set of 16.
Notes
This set contains both 2.050 in. and 2.615 in. length rocker arm nuts.
General
Brand
ARP
Item #
ARP300-8249
Mfg Part #
300-8249
UPC
672036012137
Description

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 wasn?t a "poly lock" on the market that you didn't have to continually tighten. There are several important reasons why ARP's exclusive Perma-Loc rocker arm adjusters won't 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.

You'll find ARP Perma-Loc's 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, they're the best you can buy!

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