GBP 57 Counterbore sets in a case HSS DIN h9 373 15 6420 – Set of the most commonly used counterbores for screws M3 − M4 − M5 − M6 − M8 − M10. Size DF – Counterbore 156020 DF = through hole fine quality Size DM – Counterbore 156020 DM = through hole medium quality Size K – Counterbore 156220 K = tapping hole Type DF DM K 15 6420 11M Counterbore set, 6 pieces, in a case eShop eShop eShop 1× each size 6.5×3.2; 8×4.3; 1× each size 6.5×3.4; 8×4.5; 1× each size 6.5×2.5; 8×3.3; Content: 10×5.3; 11×6.4; 15×8.4; 10×5.5; 11×6.6; 15×9; 10×4.2; 11×5; 15×6.8; Counterbore ⌀×pilot ⌀ 18×10.5 18×11 18×8.5 15 6450 11M Empty case for 6 counterbores eShop 15 6420​ ​ DIN counterbore for interchangeable pilots HSS DIN 375 Multi-edged, spiral fluted counterbore with recess in face for fitting various pilots. Pilot is clamped with a screw in the counterbore. Application: One counterbore can be used for several pilot holes of different diameters due to 15 6520​ the interchangeable pilots. Note: The dimensions relate to screws DIN 912, 6912, 7984 and ISO 1207. However, L with an appropriate pilot, a counterbore can be used for other screw sizes or counterbore / pilot diameter combinations. ⌀a ⌀ DC MK 15 Suitable for/ vc [m/min] ISO code N N N P P P P P H H H H H M M S N ​ ​ ​ ​ ​ ​ 15 6520 33 28 27 27 ● Countersink ⌀ DC 15 6520 for screw size Hole ⌀ a L MT 11M < 500 N Counterbore without pilot f mm ​ mm mm ​ mm/rev. 15 eShop M8 4 132 2 0.12 18 eShop M10 5 140 2 0.14 20 eShop M12 5 140 2 0.16 24 eShop M14 6 150 2 0.16 26 eShop M16 8 180 3 0.2 30 eShop M18 8 180 3 0.2 33 eShop M20 10 190 3 0.2 36 eShop M22 10 190 3 0.2 40 eShop M24 10 190 3 0.25 Pilot pin ​ d a DIN 1868 15 6620​ ⌀ a×⌀ d 15 6620 for screw size for hole suitable for coun- ⌀ a×⌀ d 15 6620 for screw size for hole suitable for coun- 11M 11M terbore ⌀ terbore ⌀ Pilot for counterbore Pilot for counterbore mm ​ mm mm ​ mm 4×6,8 eShop M8 Core hole 15 8×17 eShop M16 Through hole fine 26; 30 5×6,8 eShop – – 18; 20 5×8,4 (eShop) – – 18; 20 8×17,5 eShop M16 Through hole medium 26; 30 5×8,5 eShop M10 Core hole 18; 20 5×9 eShop – – 18; 20 8×19 eShop M18 Through hole fine 26; 30 5×10,2 eShop M12 Core hole 18; 20 10×14 eShop – – 33; 36; 40 5×11 eShop M10 Through hole medium 18; 20 10×17,5 eShop M20 Core hole 33; 36; 40 5×13 eShop M12 Through hole fine 18; 20 10×21 eShop M20 Through hole fine 33; 36; 40 6×8,5 eShop – – 24 10×22 eShop M20 Through hole medium 33; 36; 40 6×12 eShop M14 Core hole 24 8×10,2 (eShop) – – 26; 30 10×26 eShop M24 Through hole medium 33; 36; 40 8×12 eShop – – 26; 30 8×14 eShop M16 core hole 26; 30 ​ ​ ​ ​ ​ 214