Home / UNF Bolts, Nuts and Washers / 3/8 inch Unbrako UNF Socket Head Cap Screws ASME B18.3 / ASTM A574 in Black Oxide (Self Colour) Finished Steel

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3/8 inch Unbrako UNF Socket Head Cap Screws ASME B18.3 / ASTM A574 in Black Oxide (Self Colour) Finished Steel

Also known as an allen screw or allen bolt, or simply a cap screw. Socket head cap screws are a modern machine threaded fastener, an alternative to the standard hexagon headed bolt. The geometry of the hex drive mechanism means that these internal contact surfaces are protected from external damage. A hex or allen key is therefore required to fit these fasteners. Conforming to ASME B18.3 and material to ASTM A574, UNBRAKO® socket head caps are manufactured to be stronger than other size for size high tensile versions. Please note that due to the nature of the surface finish on Unbrako products, some surface corrosion may be evident. This does not affect the performance of the product. Minimum tensile strength of UNBRAKO® socket head caps is minimum 180,000psi which is similar to metric property class 12.9.

Unbrako UNF Socket Head Cap Screws ASME B18.3 / ASTM A574 in BO image

technical drawing of Unbrako UNF Socket Head Cap Screws ASME B18.3 / ASTM A574

Technical Summary

nominal diameter

3/8

tpi

threads per inch

minimum thread length

1.25

head diameter

0.562

k max.

maximum head height

0.375

t min.

minimum recess depth

0.182

drive size

5/16

Standard

ASME B18.3/BS 2470

all dimensions in inches

Unbrako Engineering Guide

< View All Sizes

Description	Sale Qtys	Qty	Price	Breakdown	Despatch Estimate
3/8 x 3/4 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide WF48797			£0.00
3/8 x 1-1/4 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide WF48799			£0.00
3/8 x 1-1/2 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide WF48800			£0.00
3/8 x 1-3/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide WF48801			£0.00
3/8 x 2 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide WF48802			£0.00
3/8 x 2-1/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide WF48803			£0.00
3/8 x 2-1/2 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide WF48804			£0.00
3/8 x 3-1/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide WF48806			£0.00

3/8 x 3/4 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide
WF48797

3/8 x 1-1/4 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide
WF48799

3/8 x 1-1/2 inch UNF Unbrako Socket Cap Allen Screw Full Thread in Black Oxide
WF48800

3/8 x 1-3/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide
WF48801

3/8 x 2 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide
WF48802

3/8 x 2-1/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide
WF48803

3/8 x 2-1/2 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide
WF48804

3/8 x 3-1/4 inch UNF Unbrako Socket Cap Allen Screw Part Thread in Black Oxide
WF48806

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