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captive fastener corporation 201-337-6800 FAX: 201-337-1012 • www.captive-fastener.com
2014
CKFB3 flare mounted threaded standoffs provide a flared
shank for stronger holding power and are used for spacing
or stacking PC boards.
Thread: Internal 2B ANSI B1.1 (6H, ANSI/ASME B1.13M).
Use in: Materials with Rockwell Hardness of B-65 or less.
Series Material Finish
CKFB3 Brass
CDA-360
Dimensions & Specifications
L
Thread Part Length ±.005 in. A C B H +.005
Size Number .0625 .125 .187 .250 .312 .375 .500 .625 .750 ±.003 Max. ±.003 ±.005 –.001 Min. Min.
#4-40 CKFB3440 -2 -4 -6 -8 -10 -12 -16 -20 .179 .165 .122 .219 .166 .17 .050
#6-32 CKFB3632 -2 -4 -6 -8 -10 -12 -16 -20* -24* .226 .212 .171 .281 .213 .22 .065
“T” Minimum Full .375 ±.015
thread length
INCH (in.)
Dimensions & Specifications
L
Thread Part Length ±.13 mm A C B H +.13
Size Number 2 3 4 6 8 10 12 14 16 ±.08 Max. ±.08 ±.13 –.03 Min. Min.
M3x0.5 CKFB3M3 -2 -3 -4 -6 -8 -10 -12 -14 -16 4.55 4.20 3.23 5.56 4.22 4.33 1.27
M4x0.7 CKFB3M4 -2 -3 -4 -6 -8 -10 -12 -14 -16 6.68 6.33 5.23 8.74 6.40 6.36 1.65
“T” Minimum Full 9.5 ±.4
thread length
METRIC (mm)
T
L
.04 in. (1.0 mm)
.09 in. (2.29 mm) MAX.
B C A
H
Installation & Performance Data
INCH (in.)
METRIC
(mm)
Fiberglass .060 in. (1.5 mm)
Thread Size Installation Force (lbs.) Pushout (lbs.) Torque-out (in.-lbs.)
#4-40 1000 140 18
#6-32 1500 170 28
Thread Installation Force Pushout Torque-out
Size (kN) (N) (N•m)
M3 4.4 560 2.02
M4 6.0 680 3.20
*See Finish Spec. on Page 6.
Electro Tin Plating
ASTM B545 Class B
(Zinc* Optional)
Part Number Structure:
CKFB3 440-2 Length Code
Thread Code
Series
Flare Mounted
Threaded Standoffs
Series CKFB3
