Page 474 - 2018 Racecar Engineering Engine Parts and Accessories Catalog

FASTENERS

Rocker Arm Adjusters

Shank Body Dia. Length
Part No. Description Thread "C" "D" "A"
ARP Perma-Loc
Compact 12-point fasteners won’t loosen. Sold in sets of 16.
ARP300-8241 Stamped Steel Rocker 3/8"-24 .600" .620" 1.200"
ARP300-8242 Stamped Steel Rocker 7/16"-20 .600" .640" 1.200"
ARP300-8243 Alum. Rocker 3/8"-24 .600" .550" 1.200"
ARP300-8244 Alum. Rocker 3/8"-24 .600" .600" 1.200"
ARP300-8245 Alum. Rocker 7/16"-20 .600" .550" 1.200"
ARP300-8246 Alum. Rocker 7/16"-20 .600" .600" 1.200"
ARP300-8247 Stud Girdle 7/16"-20 .600" .750" 2.050"
ARP300-8249 Big Block With Stud Girdle 7/16"-20 .600" .750" 2.050"/2.615"

Part No. Description Stud Size
Comp Cams COM4600-16
Precision ground and tapered. Sold in sets of 16.
COM4508-16 Stud Girdle Adjusting Nut 7/16"
COM4509-16 Stud Girdle Adj. Nut (8) COM4509, (8) COM4509S 3/8"
COM4510-8 Stud Girdle Adjusting Nut, Big Block Chevy Intake 7/16"
COM4514-KIT Rocker Adj. Kit For Late Big Block Chevy With Non-Adj. 7/16"
COM4600-16 Alum., Stainless Or Pro Magnum Rockers 7/16"
COM4601-16 Alum., Stainless Or Pro Magnum Rockers 3/8"
COM4602-16 Magnum Polylock 3/8"
COM4603-16 Magnum Polylock 7/16"
COM4604-16 High Energy Polylock 3/8"
COM4610-16 Rocker Adj. Kit For Small Block Ford With Non-Adj. Rockers 5/16"
COM1400N-16 Rocker Arm Nuts, for Roller Tip Magnum Rockers, Self-Locking 3/8"
COM1401N-16 Rocker Arm Nuts, for Roller Tip Magnum Rockers, Self-Locking 7/16"
COM4654-16 Rocker Arm Nuts, GM LS1 for Pro Magnum Rockers 3/8"
Individual Adjusting Nuts
COM4508-1 Stud Girdle Adj. Nut 7/16"
COM4508S-1 Stud Girdle Adj. Nut With Snap Ring 7/16"
COM4510-1 Stud Girdle Adj. Nut 7/16"
COM4600-1 Hi-Tech Polylock, Pro Magnum 7/16"
COM4601-1 Hi-Tech Polylock, Pro Magnum 3/8"
COM4509-1 Stud Girdle Adj. Nut, Stud Girdle, Black Oxide 3/8"
Steel Rocker Arms
Available in traditional self locking design, or Kool Nut, which deflects oil to the pivot.
Sold in sets of 16.
CRN99769-16
Part No. Description Stud Size
Crane Cams
CRN99768-16 Kool Nut, Counterbored For Bottleneck Studs 3/8"-24
CRN99769-16 Kool Nut, Counterbored For Bottleneck Studs 7/16"-20
CRN99770-16 Self Locking 3/8"-24
CRN99771-16 Self Locking 7/16"-20
CRN99772-16 Self-Locking 5/16"-24
Aluminum Roller Rocker Arms
Engineered for use with Crane roller tip, needle bearing aluminum rocker arms. Sold in sets of 16.
Part No. Description Stud Size
Crane Cams
CRN99788-16 .550" Min. Rocker Slot Width, 1.063" Tall 3/8"-24 CRN99788-16
CRN99790-16 .550" Min. Rocker Slot Width, .922" Tall 7/16"-20
CRN99792-16 .600" Min. Rocker Slot Width, .969" Tall 7/16"-20
ProForm
Designed to fit most extruded roller rocker arms without stud
girdle. Sold in sets of 16.
PFM66935 Poly Locks for Alum. Rockers .550" OD 3/8"-24
PFM66936 Poly Locks for Alum. Rockers .550" OD 7/16"-20
Dart Machinery
DRT64210210 Stud Girdle Intake Adjusting Nut, Big Block Chevy Long, Each 7/16" PFM66935

2018 ENGINE BUILDER CATALOG 473