Overall length L Thread length ℓ Thread + Neck length ℓn Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk ⑥ ANSI Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk Lobe TYPE Spiral Fluted Taps (for blind hole) (inch) (inch) (inch) (inch) (inch) (inch) (inch) ① 7/16-14UNC H9 5111103098 2P 3.937 0.512 - 2.008 0.323 0.242 0.406 8 3 7/16-20UNF H8 5110103101 4P 3.937 0.512 - 2.008 0.323 0.242 0.406 8 3 7/16-20UNF H8 5111103101 2P 3.937 0.512 - 2.008 0.323 0.242 0.406 8 3 1/2-13UNC H9 5110103111 4P 4.331 0.591 - 2.205 0.367 0.275 0.437 8 3 Spiral Fluted Taps (for through hole) 1/2-13UNC H9 5111103111 2P 4.331 0.591 - 2.205 0.367 0.275 0.437 8 3 ② 1/2-20UNF H8 5110103115 4P 4.331 0.591 - 2.205 0.367 0.275 0.437 8 3 1/2-20UNF H8 5111103115 2P 4.331 0.591 - 2.205 0.367 0.275 0.437 8 3 9/16-12UNC H10 5110103126 4P 4.331 0.709 - 2.205 0.429 0.322 0.5 8 3 9/16-12UNC H10 5111103126 2P 4.331 0.709 - 2.205 0.429 0.322 0.5 8 3 Spiral Pointed Taps (for through hole) ③ 9/16-18UNF H9 5110103129 4P 4.331 0.709 - 2.205 0.429 0.322 0.5 8 3 9/16-18UNF H9 5111103129 2P 4.331 0.709 - 2.205 0.429 0.322 0.5 8 3 Number of oil grooves : 1/4 and smaller = 5, 5/16 = 6, 3/8 and larger = 8 For 1/4 and smaller, external centers of 2P chamfer taps are removed. Hand Taps ④ Cemented Carbide Taps ⑤ Roll Taps ⑥ Special Thread Taps Simple Inspection Tools ⑦ Pipe Taps ⑧ Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ ANSI ※ This product is different from JIS products in shape and dimensions, please be careful when using. ⑥-10