PRAD system PSolRutiAonDtoosl ystem Specification of corresponding standard blanks (for European market) DIN371 TYPE Main size designation and specification ① ② L ℓ ℓn ℓs Ds K ℓk metric unified (reference) M2×0.4 45 8 - 32 2.8 2.1 5 M2.2×0.45 45 9 - 32 2.8 2.1 5 M2.3×0.4 45 9 - 32 2.8 2.1 5 M2.5×0.45 50 8 15 33 2.8 2.1 5 M2.6×0.45 50 8 15 33 2.8 2.1 5 M3×0.5 №4-40UNC 56 9 18 34 3.5 2.7 6 №4-48UNF M3.5×0.6 №6-32UNC 56 11 20 32 4 3 6 №6-40UNF PRAD SYSTEM M4×0.7 №8-32UNC 63 13 21 38 4.5 3.4 6 №8-36UNF M4.5×0.75 №10-24UNC 70 14 24 39 6 4.9 8 №10-32UNF M5×0.8 70 14 25 39 6 4.9 8 M6×1 80 15 30 45 6 4.9 8 1/4-20UNC 80 15 30 42 7 5.5 8 1/4-28UNF M8×1.25 5/16-18UNC 90 19 35 47 8 6.2 9 3/8-16UNC 100 23 39 54 9 7 10 M10×1.5 100 23 39 52 10 8 11 TYPE:a TYPE:b PPRRAADD-3- 760