Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk PO Spiral Pointed Taps Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (for blind hole) Spiral Fluted Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes No.6-40UNF P2 POQUN6H 5P 52 11 16 29 5 4 7 3 3 △ No.8-32UNC P2 POQUN8J 5P 60 13 21 33 5.5 4.5 7 3 3 ○ No.8-36UNF P2 POQUN8I 5P 60 13 21 33 5.5 4.5 7 3 3 △ No.10-24UNC P2 POQUNAM 5P 60 13 22 33 5.5 4.5 7 3 3 ○ (for through hole) Spiral Fluted Taps No.10-32UNF P2 POQUNAJ 5P 60 13 22 33 5.5 4.5 7 3 3 ○ No.12-24UNC P2 POQUNCM 5P 62 15 26 33 6 4.5 7 3 3 △ No.12-28UNF P2 POQUNCK 5P 62 15 26 33 6 4.5 7 3 3 △ 1/4-20UNC P2 POQU04N 5P 62 15 26 33 6 4.5 7 3 3 ○ (for through hole) Spiral Pointed Taps 1/4-28UNF P2 POQU04K 5P 62 15 26 33 6 4.5 7 3 3 ○ 1/4-32UNEF P2 POQU04J 5P 62 15 26 33 6 4.5 7 3 3 △ 5/16-18UNC P3 PORU05O 5P 70 19 - 36 6.2 5 8 3 5 ○ 5/16-24UNF P2 POQU05M 5P 70 19 - 36 6.2 5 8 3 5 ○ 5/16-32UNEF P2 POQU05J 5P 70 19 - 36 6.2 5 8 3 5 △ Hand Taps 3/8-16UNC P3 PORU06P 5P 75 23 - 38 7 5.5 8 3 5 ○ 3/8-24UNF P2 POQU06M 5P 75 23 - 38 7 5.5 8 3 5 ○ 3/8-32UNEF P2 POQU06J 5P 75 13 - 38 7 5.5 8 3 6 △ 7/16-14UNC P3 PORU07Q 5P 82 26 - 42 8.5 6.5 9 3 5 △ Carbide Taps Cemented 7/16-20UNF P3 PORU07N 5P 82 26 - 42 8.5 6.5 9 3 5 ○ 7/16-28UNEF P2 POQU07K 5P 82 26 - 42 8.5 6.5 9 3 5 △ 1/2-13UNC P3 PORU08R 5P 88 26 - 45 10.5 8 11 3 5 ○ 1/2-20UNF P3 PORU08N 5P 88 26 - 45 10.5 8 11 3 5 ○ Roll Taps 1/2-28UNEF P2 POQU08K 5P 88 26 - 45 10.5 8 11 3 5 △ 9/16-12UNC P3 PORU09S 5P 95 26 - 48 12.5 10 13 3 5 △ 9/16-18UNF P3 PORU09O 5P 95 26 - 48 12.5 10 13 3 5 ○ 5/8-11UNC P3 PORU10U 5P 95 26 - 48 12.5 10 13 3 5 △ 5/8-18UNF P3 PORU10O 5P 95 26 - 48 12.5 10 13 3 5 △ Simple Inspection Tools Special Thread Taps 3/4-10UNC P4 POSU12V 5P 105 33 - 50 15 12 15 3 7 △ 3/4-16UNF P3 PORU12P 5P 105 33 - 50 15 12 15 3 7 ○ 3/4-20UNEF P3 PORU12N 5P 105 33 - 50 15 12 15 3 7 △ 7/8-9UNC P4 POSU14W 5P 115 33 - 55 17 13 16 3 7 △ Pipe Taps 7/8-14UNF P3 PORU14Q 5P 115 33 - 55 17 13 16 3 7 △ 1 -8UNC P4 POSU16X 5P 125 39 - 58 19 15 18 3 7 △ 1 -12UNF P4 POSU16S 5P 125 39 - 58 19 15 18 3 7 △ 1 -14UNS P4 POSU16Q 5P 125 39 - 58 19 15 18 3 7 △ Thread Mills 1 1/8-7UNC P4 POSU18Y 5P 135 46 - 62 23 17 20 4 7 △ 1 1/4-7UNC P4 POMSU20Y 5P 145 46 - 67 24 19 22 4 7 △ 1 3/8-6UNC P5 POMTU22Z 5P 155 52 - 71 28 21 24 4 7 △ 1 1/2-6UNC P5 POMTU24Z 5P 165 52 - 76 30 23 26 4 7 △ Dies For Whitworth Threads Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes 1/8W40 P2 POQW02H 5P 52 11 17 29 5 4 7 3 3 △ 5/32W32 P2 POQW2HJ 5P 52 11 17 29 5 4 7 3 3 △ Center Drills 3/16W24 P2 POQW03M 5P 60 13 21 33 5.5 4.5 7 3 3 ○ 7/32W24 P2 POQW3HM 5P 62 15 26 33 6 4.5 7 3 3 △ 1/4W20 P3 PORW04N 5P 62 15 26 33 6 4.5 7 3 3 ○ 5/16W18 P3 PORW05O 5P 70 19 - 36 6.2 5 8 3 5 ○ 3/8W16 P3 PORW06P 5P 75 23 - 38 7 5.5 8 3 5 ○ Centering Tools 7/16W14 P3 PORW07Q 5P 82 26 - 42 8.5 6.5 9 3 5 △ 1/2W12 P3 PORW08S 5P 88 26 - 45 10.5 8 11 3 5 ○ 9/16W12 P3 PORW09S 5P 95 26 - 48 12.5 10 13 3 5 △ JIS ◎=Standard ○=Semi standard △=Made to order PO-084 For improvement, spec may change without advance notice. 401