Home / UNC Bolts, Nuts and Washers / UNC Socket Head Countersunk Screws ASME B18. 3-2003 4-40 inch in Bright Zinc Plated (BZP) Steel

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UNC Socket Head Countersunk Screws ASME B18. 3-2003 4-40 inch in Bright Zinc Plated (BZP) Steel

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. 3-2003 in BZP image

technical drawing of UNC Socket Head Countersunk Screws ASME B18. 3-2003

Technical Summary

nominal diameter

4-40

head diameter

0.212

head height

0.067

drive size

Standard

ASME B18.3-2003,ASTM F879-02a(CW)

Material

Bright Zinc Plated (BZP) Steel

all dimensions in millimetres (mm)

datasheet

Description	Sale Qtys	Qty	Price	Breakdown	Despatch Estimate
Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel (WF29391)			£0.00
Socket Head Countersunk Screw UNC 4-40 x 3/8 inch in Zinc Plated Steel (WF29392)			£0.00
Socket Head Countersunk Screw UNC 4-40 x 1/2 inch in Zinc Plated Steel (WF29393)			£0.00
Socket Head Countersunk Screw UNC 4-40 x 5/8 inch in Zinc Plated Steel (WF29394)			£0.00
Socket Head Countersunk Screw UNC 4-40 x 3/4 inch in Zinc Plated Steel (WF29395)			£0.00

Socket Head Countersunk Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel
(WF29391)

Socket Head Countersunk Screw UNC 4-40 x 3/8 inch in Zinc Plated Steel
(WF29392)

Socket Head Countersunk Screw UNC 4-40 x 1/2 inch in Zinc Plated Steel
(WF29393)

Socket Head Countersunk Screw UNC 4-40 x 5/8 inch in Zinc Plated Steel
(WF29394)

Socket Head Countersunk Screw UNC 4-40 x 3/4 inch in Zinc Plated Steel
(WF29395)

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