product image product image product image product image

Fastener Components: Maynard Improved Lockthread

Maynard Improved Lockthread Key Details

Not all bolts are created equally.   When your bolted joint absolutely must stay together, choose our Maynard Improved Lockthread.  We’ve taken the tri-lobular lockthread concept and perfected it to offer the best locking bolt on the market.

Improved Lockthread is a special, self-locking screw thread that locks itself by means of interference on the minor diameter.

The advantages of lock thread are:
• Easy Install with standard tools
• Stronger in torque and tension
• Strong, self-locking action
• High shear resistance
• Resists shock vibration
• Removable and reusable
• Unique tri-lobular design
• Produces uniform clamping loads
• Mates with standard threaded nuts
• Prevailing torque in prescribed limits
• High fatigue capacity

Additionally, we are the only manufacturer in the world able to provide Self-Aligning Lockthread (SALT).  SALT is the application of our Maynard Improved Lockthread with a patented self-alignment anti-cross thread feature.

Our Maynard Improved Lockthread pattern is available on Carbon, Stainless Steel and Exotic Alloy fasteners.

Whether your needs are for prevailing torque, special inch or metric fasteners, we have the ability and capability to manufacture to your specifications.  

Our Improved Lockthread bolts can be found in the driveways, highways, farms and construction sites on the equipment by some of the most recognizable OEMs in those industries.

Maynard Lockthread is often applied in High Temperature / High Vibration applications.  To learn more, click here.

Industries Served


Production Locations



Thursday, March 10, 2016

General Motors Recognizes MacLean-Fogg Component Solutions as a 2015 Supplier of the Year Winner

MacLean-Fogg Component Solutions was named a GM Supplier of the Year by General Motors during its 24th annual Supplier of the Year awards ceremony held Thursday, March 10 at Cobo Center in Detroit, Michigan. General Motors recognized 110 of its best suppliers from 17 countries that have consistently exceeded GM’s expectations, created outstanding value, or brought new innovations to the company. This is the first time in MacLean-Fogg Component Solutions’ history we have received this award. » Continue Reading

Tuesday, July 28, 2015

MFCS Celebrates Three Anniversaries

2015 is a milestone year for Mac-Lean Fogg Company. Not only is the company as a whole celebrating its 90th year in business, but MacLean-Fogg Component Solutions, a division of MacLean-Fogg Company, is also celebrating significant anniversaries in three of its own divisions. » Continue Reading