APM Hexseal Corp.

APM's patented, pre-assembled SEELBOLTs and SEELSKREWs are pre-assembled to provide both fastening and sealing integrity in a single unit. Read more...

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J.Lanfranco Fastener Systems Inc.

Service proven locking performance with guaranteed values. Unique anti-galling treatment made for stainless steel. Samples for testing ready to ship today! Read more...

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J.Lanfranco Fastener Systems Inc.

LANFRANCO ESL self-locking nuts provide superior resistance to vibration, extreme temperatures and corrosion. ESL nuts ensure easy installations with standard tools and bolts. Read more...

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J.Lanfranco Fastener Systems Inc.

Lanfranco all metal self-locking nuts with high temperature nylon insert are rated for applications up to 230°C. These special nylon insert locknuts respect all metric standards including: Read more...

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J.Lanfranco Fastener Systems Inc.

Lanfranco slotted locknuts have been depended on to perform under the most severe service conditions for 35yrs. Our all metal, single piece design is easy to install, is reusable and will not damage bolts. The ideal choice for mining fasteners, transportation fasteners, nuclear fusion fasteners and a wide range of other applications. Read more...

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Nelson Stud Welding

Doncasters Group Ltd. - Fastener Systems manufactures custom locknuts to match your specifications. Read more...

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