High Strength Bolts

Otto-Max distributes anchor bolts, U-Bolts and high strength bolts manufactured by McAllister Spring. McAllister Spring has been providing high quality suspension products since 1913. Today, McAllister Spring, also known as "MACSPRING", manufactures leaf springs, U-Bolts and associated parts for the OEM (Original Equipment) and aftermarket sectors of the transportation industry. While we make a full range of spring products, McAllister specializes in heavy truck applications. Here's some of our heavy duty bolt products:

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U-Bolts

A U-bolt is a u-shaped double ended bolt used to attach leaf springs to an axle. MACSPRING manufactures U-Bolts for automobiles, light & heavy duty trucks and trailers, as well as for industrial applications.

Fully manufactured and heat-treated alloy steel Grade 8 U-bolts range from 5/8" to 2" diameter with National Coarse or National Fine threads. Cold bent, hi-tensile U-bolts ranging from 3/8" to 1 1/4" diameter are also available.

Orders for U-bolts can usually be completed in one day. Metric sizes and metric threads are available on request.


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Anchor Bolts

Otto-Max is a supplier of custom order anchor bolts (see graphic at right). Made of carbon or fully heat-treated medium alloy steel, the McAllister line of anchor bolts for industrial and construction applications ranges from 3/4" to 2" diameter and in lengths up to 7 feet. Available in various SAE and ASTM specifications (eg. ASTM A325). Bare or galvanized.

What is an Anchor Bolt?
"An anchor bolt is used to attach objects or structures to concrete. There are many types of anchor bolts, consisting of designs that are mostly proprietary to the manufacturing companies. All consist of a threaded end, to which a nut and washer can be attached for the external load. Anchor bolts are extensively used on all types of projects, from standard building to dams and nuclear power plants." Wikipedia


High Strength Bolts

High Strength Bolts

Otto-Max is a wholesaler of MACSPRING high-strength, full body heat-treated alloy steel bolts, ranging from 3/4" to 2 inch diameter in Grade 5 or Grade 8, and in lengths up to 8 feet. All bolts can be supplied bare or plated.

On special orders, we are able to deliver bolts up to 20 feet in length.

Otto-Max manufactures and distributes MACSPRING high strength bolts, including heat treated alloy steel bolts, custom bolts, cold bent hi-tensile U-Bolts, and anchor bolts made of fully heat treated medium alloy steel.