SizeClassCodeChamferLℓnℓsDsKℓkNo. of
(mm)(mm)(mm)(mm)(mm)(mm)(mm)flutes Type Stock
7/16-20UNFP3PORU07NL155P15026-508.56.5932

PORU08RL15 150

1/2-13UNC P3 5P 26 - 60 10.5 8 11 3 2 △

PORU08RL20 200 PORU08NL15 150

1/2-20UNF P3 5P 26 - 60 10.5 8 11 3 2 △

PORU08NL20 200 PORU10UL15 150

5/8-11UNC P3 5P 26 - 60 12.5 10 13 3 2 △

PORU10UL20 200 PORU10OL15 150

5/8-18UNF P3 5P 26 - 60 12.5 10 13 3 2 △

PORU10OL20 200 POSU12VL15 150

3/4-10UNC P4 5P 33 - 70 15 12 15 3 3 △

POSU12VL20 200 PORU12PL15 150

3/4-16UNF P3 5P 33 - 70 15 12 15 3 3 △

PORU12PL20 200

7/8-9UNCP4POSU14WL205P20033-7017131633
7/8-14UNFP3PORU14QL205P20033-7017131633
1 -8UNCP4POSU16XL205P20039-8019151833
1 -12UNFP4POSU16SL205P20039-8019151833

For Whitworth Threads

L ℓn ℓs Ds K ℓk No. of

Size Class Code Chamfer flutes Type Stock

(mm) (mm) (mm) (mm) (mm) (mm) (mm)

PORW04NL10 100

1/4W20 P3 5P 15 26 40 6 4.5 7 3 1 △

PORW04NL15 150 PORW05OL10 100

5/16W18 P3 5P 19 - 50 6.2 5 8 3 2 △

PORW05OL15 150 PORW06PL10 100

3/8W16 P3 5P 23 - 50 7 5.5 8 3 2 △

PORW06PL15 150

7/16W14 P3 PORW07QL15 5P 150 26 - 50 8.5 6.5 9 3 2 △

PORW08SL15 150

1/2W12 P3 5P 26 - 60 10.5 8 11 3 2 △

PORW08SL20 200 PORW10UL15 150

5/8W11 P3 5P 26 - 60 12.5 10 13 3 2 △

PORW10UL20 200 POSW12VL15 150

3/4W10 P4 5P 33 - 70 15 12 15 3 3 △

POSW12VL20 200 POSW14WL15 150

7/8W9 P4 5P 33 - 70 17 13 16 3 3 △

POSW14WL20 200 POSW16XL15 150

1 W8 P4 5P 39 - 80 19 15 18 3 3 △

POSW16XL20 200