Oversized h stock standard, ) check stock EU, f check stock JP, m stock exhaustion SP TRI Intro GP General Purpose Series Spiral Fluted Taps for Tripod Threads SP FEATURES 2.5PHSS-E For camera tripod threads.Thread is oversized. SL THCHT Recommended Tapping Speeds Depending On Materials PO ISO Vc (m/min) N1 ≤10 H N2 ≤10 H N3 ≤10 H ST N4 ≤10 H H 1st choice I suitable ROLL JIS-SP TRI TYPE: ST_008 K CARBIDE DCON THL LK K LU LS LONG LF HAND TAPS TRI TCTR Ø Hole Ø(tolerance)(mm)(mm)CodeTHCHT(chamfer)LF(mm)THL(mm) LU(mm) LS DCON K(mm)(mm)(mm)LK(mm)NOFType Stock JIS 1/4-20 - 5.15 5.19 SYU04N0KEB 2.5P 62 15 26 33 6 4.5 7 3 008 f EG (STI) SPECIAL THREADS, GAUGES JIS THREAD MILLS DIES CENTER DRILLS Technical info 583