Home / UNC Bolts, Nuts and Washers / Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel - ASME B18.3

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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

nominal diameter

4-40

tpi

threads per inch

head diameter

0.212

head height

0.083

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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