Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ANSI ⑥ Roll Tap Series Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk ANSI ① MHRZ Z-PRO   Roll Taps for Medium Hardness Carbon Steels ② Specification ■Suitable tapping in thermal refined steels Coating ( ~ 35HRC). ③ Recommended Tapping Speed depending on Materials Medium carbon steels High carbon steels Alloy steels Thermal refined steels 中炭素鋼 高炭素鋼 合金鋼 調質鋼 10〜30 10〜30 10〜30 10〜20 ④ (m/min) (m/min) (m/min) (m/min)25〜35HRC TYPE:1 ⑤ ⑥ TYPE:2 TYPE:3 ⑦ Segment:1J Size Class Code Chamfer L(inch) ℓ(inch) ℓn(inch) ℓs(inch) Ds(inch) K(inch) ℓk(inch) Lobe TYPE ⑧ For Unified ThreadsNo.10-24UNCH651101030394P2.7560.3540.9451.6540.194 0.152 0.25 5 1 No.10-24UNC H6 5111103039 2P 2.756 0.354 0.945 1.654 0.194 0.152 0.25 5 1 No.10-32UNF H6 5110103041 4P 2.756 0.354 0.945 1.654 0.194 0.152 0.25 5 1 No.10-32UNF H6 5111103041 2P 2.756 0.354 0.945 1.654 0.194 0.152 0.25 5 1 ⑨ 1/4-20UNC H7 5110103058 4P 3.15 0.433 1.181 1.713 0.255 0.191 0.312 5 1 1/4-20UNC H7 5111103058 2P 3.15 0.433 1.181 1.713 0.255 0.191 0.312 5 1 1/4-28UNF H6 5110103062 4P 3.15 0.433 1.181 1.713 0.255 0.191 0.312 5 1 1/4-28UNF H6 5111103062 2P 3.15 0.433 1.181 1.713 0.255 0.191 0.312 5 1 5/16-18UNC H8 5110103071 4P 3.543 0.472 1.378 1.831 0.318 0.238 0.375 6 2 ⑩ 5/16-18UNC H8 5111103071 2P 3.543 0.472 1.378 1.831 0.318 0.238 0.375 6 2 5/16-24UNF H7 5110103074 4P 3.543 0.472 1.378 1.831 0.318 0.238 0.375 6 2 5/16-24UNF H7 5111103074 2P 3.543 0.472 1.378 1.831 0.318 0.238 0.375 6 2 3/8-16UNC H8 5110103082 4P 3.937 0.512 1.535 2.028 0.381 0.286 0.437 8 2 3/8-16UNC H8 5111103082 2P 3.937 0.512 1.535 2.028 0.381 0.286 0.437 8 2 ⑪ 3/8-24UNF H7 5110103085 4P 3.937 0.512 1.535 2.028 0.381 0.286 0.437 8 2 3/8-24UNF H7 5111103085 2P 3.937 0.512 1.535 2.028 0.381 0.286 0.437 8 2 7/16-14UNC H9 5110103098 4P 3.937 0.512 - 2.008 0.323 0.242 0.406 8 3 ANSI ⑥-9 ※ This product is different from JIS products in shape and dimensions, please be careful when using.