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5/16 inch UNF Socket Head Countersunk Screws ASME B18. 3-2003 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 UNF Socket Head Countersunk Screws ASME B18. 3-2003 in BZP image
technical drawing of UNF Socket Head Countersunk Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 5/16
tpi threads per inch 24
dk head diameter 0.656
k head height 0.198
t recess depth 0.135
s drive size 3/16
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 UNF 5/16 x 5/8 inch in Zinc Plated Steel
WF29452 - 5 in stock
single screw for £2.55
or box of 20 for £14.76
or bulk of 100 for £59.51
£0.00  
Socket Head Countersunk Screw UNF 5/16 x 3/4 inch in Zinc Plated Steel
WF29453 - 120 in stock
single screw for £2.74
or box of 15 for £13.67
or bulk of 75 for £56.00
£0.00  
Socket Head Countersunk Screw UNF 5/16 x 1 inch in Zinc Plated Steel
WF29454 - 172 in stock
single screw for £3.38
or box of 15 for £22.63
or bulk of 75 for £87.98
£0.00  
Socket Head Csk Screw UNF 5/16 x 1-1/4 inch in Zinc Plated Steel
WF29455 - 64 in stock
single screw for £3.09
or box of 10 for £12.39
or bulk of 50 for £51.42
£0.00  
Socket Head Csk Screw UNF 5/16 x 1-1/2 inch in Zinc Plated Steel
WF29456 - 50 in stock
single screw for £3.64
or box of 10 for £17.49
or bulk of 50 for £69.62
£0.00  
single screw for £2.55
or box of 20 for £14.76
or bulk of 100 for £59.51
£0.00
 
single screw for £2.74
or box of 15 for £13.67
or bulk of 75 for £56.00
£0.00
 
single screw for £3.38
or box of 15 for £22.63
or bulk of 75 for £87.98
£0.00
 
single screw for £3.09
or box of 10 for £12.39
or bulk of 50 for £51.42
£0.00
 
single screw for £3.64
or box of 10 for £17.49
or bulk of 50 for £69.62
£0.00
 
Prices are subject to quantity discounts based on a sliding scale. Enter the desired quantity in the relevant box in the table above. This will automatically calculate a line price indicating the applicable rate for the quantities selected. All prices shown exclude VAT.
technical drawing of UNF Socket Head Countersunk Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 5/16
tpi threads per inch 24
dk head diameter 0.656
k head height 0.198
t recess depth 0.135
s drive size 3/16
Standard ASME B18.3
all dimensions in inches
Datasheet
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