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Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel - ASME B18.3

A countersunk headed screw conforming with ASME/ANSI B18.3, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank.
Image of UNC Socket Head Countersunk Screws ASME B18.3-2012 in BZP image
technical drawing of UNC Socket Head Countersunk Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.212
k head height 0.083
s drive size 1/16
Standard ASME B18.3
all dimensions in inches
Datasheet
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Description Sale Qtys Qty Price Breakdown Despatch Estimate
Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel
WF29391
£1.75
Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel   WF29391
£1.75
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technical drawing of UNC Socket Head Countersunk Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.212
k head height 0.083
s drive size 1/16
Standard ASME B18.3
all dimensions in inches
Datasheet
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