ckf2 and ckfs2 broaching-type fasteners are designe d for use on printed circuit boards and on most brittle or ha rd materials: glass laminates, epoxy or resin with paper, nylon, or canvas bases. they are also used on materials too thin or unsuitable for threading, such as acrylic and polycarbonate pa nels. series material finish ckf2 carbon steel electro tin plating (zinc* optional) ckfs2 300 series passivated astm a380 stainless steel *spec. astm b633-85 thread: class 2b, mil-s-7742; (6h iso metric). use in: materials with rockwell hardness of b-60 or less. dimensions & specifications thread part number a b c + .003 size carbon steel stainless steel .003 .005 .005 C .000 min. min. #2-56 ckf2256 ckfs2256 .165 .219 .065 .147 .16 .060 #4-40 ckf2440 ckfs2440 .184 .219 .065 .166 .17 .060 #6-32 ckf2632 CKFS2632 .231 .281 .065 .213 .22 .060 #8-32 ckf2832 ckfs2832 .268 .344 .096 .250 .25 .060 #10-24 ckf21024 ckfs21024 .290 .375 .127 .272 .28 .060 #10-32 ckf21032 ckfs21032 .290 .375 .127 .272 .28 .060 thread part number a b c + .08 size carbon steel stainless steel .08 .13 .13 C .000 min. min. m2 x 0.4 ckf2m2 ckfs2m2 4.19 5.56 1.5 3.7 4.2 1.5 m2.5 x 0.45 ckf2m2.5 ckfs2m2.5 4.68 5.56 1.5 4.2 4.5 1.5 m3 x 0.5 ckf2m3 ckfs2m3 4.68 5.56 1.5 4.2 4.5 1.5 m4 x 0.7 ckf2m4 ckfs2m4 6.81 8.74 2.0 6.4 6.4 1.5 m5 x 0.8 ckf2m5 ckfs2m5 7.37 9.53 3.0 6.9 7.1 1.5 a c b .060 in. 1.5 mm max. inch (in.) metric (mm) since the aforementioned materials do not flow unde r pressure, these fasteners are designed with a knurled shank t hat can be pressed into a drilled hole. the shank grips the bo ard with an interference fit by broaching its way into the pane l as it is squeezed into the holes. all fasteners from captive fastener are identical t o industry standards so that they can be fed through standard automatic insertion equipment. continued on next page. note: ckf2 & ckfs2 broaching fasteners are designed for unplated through-holes. when installed in pla ted through-holes, a hole tolerance of +.005 - .001 in. (+.13 - .03 mm) should be used. when used in plated through-holes, performance will be reduced and plating may be damaged by knurl. captive fastener corporation 201-337-6800 fax: 201-337-1012 ? www.captive-fastener.com 46 broaching-type fasteners series ckf2 & ckfs2 free datasheet http://www..net/
inch (in.) metric (mm) fiberglass 0.060 in. (1.5 mm) thread size installation force (lbs.) pushout (lbs.) t orque-out (in.-lbs.) #2-56 400 60 6 #4-40 400 65 15 #6-32 500 80 30 #8-32 700 95 35 #10-24 700 100 40 #10-32 700 100 40 thread size installation force (kn) pushout (n) torque -out (n ? m) m2.5 2.22 200 1.35 m3 2.22 200 1.35 m4 2.90 330 3.73 m5 2.90 350 4.52 installation & performance data continued from previous page. www.captive-fastener.com ? 201-337-6800 fax: 201-337-1012 captive fastener corporation 47 broaching-type fasteners series ckf2 & ckfs2 free datasheet http://www..net/
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