ARP Bolts have become the preferred fasteners when it comes to connecting rods, cylinder heads, and main bearing caps, but these fasteners are now available to fabricators in handy 5-packs. Photos from arp-bolts.com

ARP Bolts are widely coveted as a “must have” for connecting rods and cylinder head fasteners, and they have been considered a staple in those applications for decades now. Modern technology has shown that stretch factor plays a significant role in the clamping power of a fastener.

A series of special checking devices are employed to monitor the quality of threads. For every thread size, there is a checking device.

By now everyone that wrenches on fasteners understands that not all bolts are created equal. Designing automotive bolts is a complex process that involves many different aspects and factors, including operational loads and geometric configuration. 

The new bulk fastener kits are available in many different sizes from 1/4-inch to 1/2-inch diameter, up to 6-inches in length.

Custom builders and Hot Rodders often engineer their project cars using their own engineering and design. Because many of the custom builds are unique and one-off fabrications, Hot Rod builders can make use of ARP’s “bulk” fasteners, which are sold by size in handy 5-packs.

Fasteners act like return springs in as much as they need to be stretched to produce the proper preload. For a fastener to function properly, the fastener must be stretched so the material’s ability to rebound can provide the clamping force to hold a bolted joint tight.

Joints that require significant clamping force, like bolts that join parts of a frame, connect suspension components to the chassis and other high stress joints. ARP Bolts in the bulk fastener packages are an affordable way to purchase high yield bolts for your project builds. Available from 1/4-20 x 1/2-inch all the way up to 1/2- 13 x 6-inch bolts.

For more information on ARP Bolts line of “bulk” fasteners, visit them online at arp-bolts.com.