- MANSFIELD, TEXAS · SINCE 1982
COMMERCIAL LOCKNUTS FOR CHALLENGING APPLICATIONS
18 LOCKNUT STYLES. ALL MADE IN AMERICA.
Lok-Mor manufactures a broad range of industrial locknuts engineered to maintain clamp load, resist vibration loosening, and support joint integrity in demanding applications. Whether you need a structural locknut, prevailing torque locknut, or free-spinning design, our team can help you find the right fit.
Fast lead times | Award-winning locknuts | Custom Manufacturing
Reliability You Can Count On
MANUFACTURING SINCE
LOCKNUT TYPES
DOMESTIC MANUFACTURING
ANCO® PN-LOC®s INSTALLED
- PROVEN PERFORMANCE
PROVEN PERFORMANCE BUILT ON EXPERIENCE
For over 40 years, Lok-Mor has supplied locking solutions for industrial applications where reliability matters. Engineers and manufacturers count on us for fastening solutions backed by experience, testing, and real-world performance.
- Manufacturing locknuts since 1982
- Made in America — all processes at our Mansfield, Texas facility
- Built around recognized quality standards and certifications
Quality Program
Lok-Mor’s quality program meets the requirements of the following industry standards, supported by an in-house, A2LA-certified quality assurance lab:
• ISO 9001:205 • Mil-I-45208 • ISO/IEC 17025 • ANSI/ASME • ASTM
FASTENER TECHNOLOGY INTERNATIONAL - A TOP PRODUCT OF 2024
In 2024, Fastener Technology International recognized Lok-Mor’s ANCO® PN-LOC® for innovation and performance in industrial fastening – a distinction earned through decades of engineering commitment and real-world reliability.
- LOCKNUT SOLUTIONS FOR EVERY NEED
18 STYLES, THREE CATEGORIES, ONE TRUSTED SOURCE
Not every application needs the same locknut. Lok-Mor® offers 18 locknut styles across three primary categories to match the right solution to the assembly.
ANCO® PN-LOC®
Lok-Mor® is the home of the original pin locknut – the ANCO® PN-LOC®. This award-winning locknut is engineered with a unique locking indentation and stainless-steel ratchet pin to perform in applications where high clamp load, structural integrity, and resistance to loosening are critical.
Over 95 million installed!
PREVAILING TORQUE LOCKNUTS
12 styles engineered to maintain locking performance through friction-based resistance during installation and service.
FREE-SPINNING LOCKNUTS
5 styles ideal for applications that benefit from easy run-down, limited reusability, and efficient installation before locking engagement.
- OVER 40 YEARS
ENGINEERED, MANUFACTURED, AND TESTED IN TEXAS
Lok-Mor’s manufacturing and quality program supports customers who need more than catalog hardware. With domestic production in Texas, in-house testing capabilities, and an advanced quality assurance program, customers can depend on Lok-Mor® locknuts being Made in America. Made Right.™
- Domestic manufacturing for quality control and supply responsiveness
- In-house A2LA-accredited lab and structured quality program for consistent performance
- Custom manufacturing capabilities to meet unique customer requirements
testing capabilities
Our rigorous testing capabilities include, but are not limited to:
- Proof load
- Charpy impact testing
- Torque testing
- Fatigue testing
- Plating thickness/adhesion
Custom Manufacturing
For your custom locknut and hardware needs, our domestic manufacturing offers:
- Per-print or per-sample services
- Broad selection of materials, including exotics
- Standard, non-standard, and left-hand threads
- INDUSTRIES WE SERVE
Designed to Stay Put, No Matter Your Industry
Lok-Mor supports customers across industries where joint reliability is critical to safety, uptime, and equipment performance.
HEAVY EQUIPMENT
Fastening solutions for rugged operating conditions and vibration-prone assemblies. From excavators to mining machinery, Lok-Mor locknuts hold up where it counts.
OEM MANUFACTURING
Locknut options to support performance, consistency, and manufacturability in original equipment designs. We work directly with OEM teams to identify the right solution.
OIL & GAS
Reliable locking performance for demanding field and process environments. Trusted in Upstream, Midstream, and Downstream applications where joint integrity is critical.
SHIPBUILDING
Solutions for assemblies exposed to dynamic loads, long service life requirements, and challenging operating environments. Lok-Mor locknuts stand up to the demands of marine applications.
- Ready to get started?
TALK TO A LOK-MOR® EXPERT TODAY
If you already know your basic requirements, or you’d like help narrowing your options, our locknut experts are here to help. Contact our team to discuss your application and request a quote for the best-fit locking solution.
Or call us directly 800-843-7230