Threads, Fasteners and Holes

Click on the links below to learn more about each subject

Thread Rolling vs Thread Cutting

What are J Threads

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Thread Tapping vs Thread Milling

Design Guides

Metric Thru Hole Sizes

Imperial Thru Hole Sizes

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Tapping Drill Sizes

Undercuts and Thread Relief

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Counterbore Holes For Hex Head Bolts

Imperial Countersunk Holes with Screws

NAS1102 CSK Screws

A deep dive into the specifications, applications, and advantages of aerospace-grade countersunk fasteners.

Counterbore Holes For Hex Socket Screws

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6P Hex Head Bolt Sizes