DUAL-LOK®

Dual-Lok® Material Additive Type

Vespel® Locking Insert

High Temperature Capability

Dual Locking Surfaces

The patented Dual-Lok® process is a newly developed self-locking feature designed specifically for use in higher temperature applications. Using Vespel® inserts as its locking element, Dual-Lok fasteners have the capability to withstand high to low temperature cycling (-450°F to +500°F) throughout at least 15 removals. Dual-Lok fasteners meet all of the requirements of IFI 124, IFI 524 and MIL-DTL-18240.

DOWNLOAD DATASHEET

BACK TO PRODUCTS

Features
APPLICABLE STANDARDS
SPECIFICATIONS

The Dual-Lok design incorporates a specially formed locking element pressed into an off-center through-hole prepared in the threaded section of an externally threaded fastener. This unique design provides these features:
• Positive insert retention and no glue required.
• Advantage over pellets due to smaller drill hole and element diameter required to develop torque due to having two locking surfaces exposed.
• Prevailing torque performance meeting the requirements of MIL-DTL-18240
• Withstands high temperature requirements for non-metallic self-locking elements.
• Withstands high vibratory and stress conditions placed on external threaded parts.

Military Specifications:
MIL-DTL-18240

Commercial Standards:
IFI 124

Every project is special. After discussions between Long-Lok Technical Service personnel and your engineers, a torque requirement specification will be established and a formula developed for your company’s individual needs for the Dual-Lok process.

READY TO ORDER?

Long-Lok is part of Novaria Group, a cohesive family of precision component companies, that consistently delivers optimum performance and sustainable growth within the aerospace and defense marketplace.