Oversized h stock standard, ) check stock EU, f check stock JP, m stock exhaustion UNF TCTR Bored Hole Ø (mm) Code THCHT LF THL LU LS DCON K LK NOF Type Stock Intro (tolerance) Max Min (chamfer) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (Lobes) JIS G7 9.1 8.99 NRZM7U06MP 4P 75 23 - 38 7 5.5 8 3(6) 026 f 3/8-24UNF G7 9.1 8.99 NRZM7U06MB 2P 75 23 - 38 7 5.5 8 3(6) 026 f SP G8 10.62 10.48 NRZM8U07NP 4P 82 26 - 42 8.5 6.5 9 4(8) 026 f 7/16-20UNF G8 10.62 10.48 NRZM8U07NB 2P 82 26 - 42 8.5 6.5 9 4(8) 026 f G8 12.2 12.06 NRZM8U08NP 4P 88 26 - 45 10.5 8 11 4(8) 026 f 1/2-20UNF SL G8 12.2 12.06 NRZM8U08NB 2P 88 26 - 45 10.5 8 11 4(8) 026 f PO ST ROLL JIS CARBIDE LONG HAND TAPS EG (STI) SPECIAL THREADS, GAUGES THREAD MILLS DIES CENTER DRILLS Technical info 377