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FORD WD953 2011 Edition, April 29, 2011 MATERIAL AND PERFORMANCE OF SCREWS FOR USE IN PLASTICS
Description / Abstract:
FORD WD953, 2011 Edition, April 29, 2011 - MATERIAL AND PERFORMANCE OF SCREWS FOR USE IN PLASTICS
This specification covers the evaluation of performance of
thread forming screws, in the nominal diameter range 1.8mm to 6.0mm
inclusive, designed to be assembled into thermo-plastics. The
assessment criteria by which products are accepted is a ratio of
stripping torque against drive torque which must not be less than
2.5.
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