1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS B ISO 7721 KS B ISO 7721 :2010 2010 12 29 http:/www.kats.go.krKS B ISO 7721:2010 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：1995 12 26 ：2010 12 29 2010-0671 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS B ISO 7721:2010 Countersunk head screws
2、Head configuration and gauging 1983 1 ISO 7721, Countersunk head screwsHead configuration and gauging , . 1 , . 2 d k d k k () d k k F d d k F 90 2 0 KS B ISO 7721:2010 2 1 ：mm M1.6 M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 d ST 2.2 ST 2.9 ST 3.5 ST 4.2 ST 4.8 ST 5.5 ST 6.3 ST 8 ST 9.5 3.6
3、 4.4 5.5 6.3 8.2 9.4 10.411.512.617.3 20 24 28 32 36 40 3.3 4.1 5.1 5.9 7.7 8.9 9.8 10.9 11.9 16.5 19.2 23.1 27 30.8 34.7 38.5 3 3.8 4.7 5.5 7.3 8.4 9.3 10.3 11.3 15.8 18.3 22 25.5 29 32.5 36 d k 2.7 3.5 4.4 5.2 6.9 8 8.9 9.9 10.9 15.4 17.8 21.5 251 28.5 31.9 35.4 F 0.15 0.15 0.2 0.2 0.25 0.25 0.3 0
4、3 0.35 0.45 0.4 0.46 0.5 0.6 0.65 0.75 1 1.2 1.5 1.65 2.35 2.7 2.7 3.34.65 5 6 7 8 9 101 k () 1.1 1.7 2.35 2.6 2.8 3 3.15 4.65 5.25 3 2 ：mm M1.6 M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10 d ST 2.2 ST 2.9 ST 3.5 ST 4.2 ST 4.8 ST 5.5 ST 6.3 ST 8 ST 9.5 3.6 4.4 5.5 6.3 8.2 9.4 10.4 11.5 12.6 17.3 20 D 3.55 4.35
5、5.45 6.25 8.15 9.35 110.35 11.45 12.55 17.25 19.95 1.84 2.36 2.74 3.3 3.9 4.4 5.5 5.68 6.6 8.54 10.62 d a 1.74 2.26 2.64 3.2 3.8 4.3 5.4 5.58 6.5 8.44 10.52 0.15 0.15 0.2 0.2 0.25 0.25 0.3 0.3 0.35 0.4 0.4 F 0.14 0.14 0.19 0.19 0.24 0.24 0.29 0.29 0.34 0.39 0.39 2.68 3.48 4.38 5.18 6.88 7.98 8.88 9.
6、88 10.88 15.38 17.78 d h 2.7 3.5 4.4 5.2 6.9 8 18.98 9.9 10.9 15.4 17.8 d a (r) . r0.25 d r0.4 d d k A B . d aF A D B d h90 0 30 KS B ISO 7721:2010 3 A A.1 , C . M1.6 M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10 ST 2.2 ST 2.9 ST 3.5 ST 4.2 ST 4.8 ST 5.5 ST 6.3 ST 8 C 0.2 0.22 0.28 0.3 0.32 0.35 0.38 0.4 0.42 0.5
7、 0.63A.2 , . spr pLM=(FC) sec 45 rLM tan 22 30(FC) sec 45 tan 22 30 s(FC) sec 45 (FC) sec 45 tan 22 30 (FC) (sec 45 ) (1tan 22 30) 0.83(FC) d k d k 2sd k 1.66(FC) , d k d k (d k d k ) d k d k 2F d k F FC d k S L P r M 22 30 22 30 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ KS B ISO 7721 :2010 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Countersunk head screws Head configuration and gauging ICS 21.060.10 Korean Agency for Technology and Standards http:/www.kats.go.kr
