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FORD WD953 2011 Edition, April 29, 2011 MATERIAL AND PERFORMANCE OF SCREWS FOR USE IN PLASTICS
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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.