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The self-locking feature requires the Tap square and shank dimension meet the maximum accepted dimension shown on our size charts. 

Metric sizes are noted as a conversion.
ANSI square and shank tap dims with metric threads are recommended.

    Quick Reference

ANSI (metric) 101 Size Chart

NPT Pipe 102 Size Chart

Great you have a match... contact us or your distributor for more information.

Always in stock! Ships same-day by 1:00pm Pacific Time Zone.