Products to Compare (max of 3)
X
Compare These Parts
America's Oldest Speed Shop ® Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Help Center
Help Center

U.S.Order Line:

800.979.0122

(CST) 7am - 10pm

Race and Rod Tech Support

Mon-Fri 8am - 5pm

Canadian Order Line:

855.313.9180

International Order Line:

1.402.323.3200
Since 1952
Menu
Shop By
Support
Account

ARP Fasteners 300-8243 Adjustable 3/8 Inch-24 Rocker Nut Kit, 16 Piece

Specs
Material Type:
Steel
Sold in Quantity:
Kit
Finish:
Black Oxide
Thread Pitch:
3/8"-24
MFG. Part #:
300-8243
Overall Height:
1.20
Outside Diameter:
.55
GTIN Code:
672036012076
ARP Fasteners 300-8243 Adjustable 3/8 Inch-24 Rocker Nut Kit, 16 Piece

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (0)

Q & A (2)

What's in the Box

Info

These replacement rocker arm nut kits are made for stamped steel rockers. When rebuilding an engine, it is recommended to replace the rocker studs along with the rocker ball and nuts.

ARP Adjustable 3/8 Inch Rocker Nut Kit

  • Exclusive 12 point head
  • Heat-treated premium grade A 8740 chromoly steel
  • 190,000 psi tensile strength
  • Precision machined threads
  • 1.200" length
  • 3/8-24 thread size
  • .550 body diameter
  • 16 piece pack
  • Includes Perma-Loc - 12 point head with special shouldered "stop" to hold wrench. Eliminates need for special adjusting tools.

Customer Reviews

This product has no reviews.

Product Q&A

2 questions : 2 answers

1 answers

What is the length of the 0.550" diameter? I am having some trouble with the hex on my current locks and was looking for something that had a longer length at the 0.550" diameter. I was wondering how long that diameter is on these locks to see if they will fix my issue.

12Mod
February 17, 2015

What is the length of the 0.550" diameter? I am having some trouble with the hex on my current locks and was looking for something that had a longer length at the 0.550" diameter. I was wondering how long that diameter is on these locks to see if they will fix my issue.

Answers

February 17, 2015
EricM
These are .710" tall from the bottom to the bottom edge of flange. Overall height is 1.200"
1 answers

are these a poly lock doesn't really specify in listing unless I'm reading it wrong

dennis
palmer mass
May 10, 2015

are these a poly lock doesn't really specify in listing unless I'm reading it wrong

Answers

May 11, 2015
Eric
Expert
Yes this style of rocker arm nut is commonly called a poly lock or posi lock.
Page 1 of 1
Suggestions