Westfield Fasteners Ltd Logo
Westfield Fasteners Ltd Telephone: 01844201133, Email: enquiries@westfieldfasteners.co.uk
Home   /   UNF Bolts, Nuts and Washers   /   3/8 inch UNF Socket Head Cap Screws ASME B18. 3-2003 in A2 Stainless Steel

3/8 inch UNF Socket Head Cap Screws ASME B18. 3-2003 in A2 Stainless Steel

Also known as an Allen screw or Allen bolt, or simply a cap screw, socket head cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to ASME/ANSI B18.3, the contact surfaces of this screw or bolt are protected from external damage. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.
Image of UNF Socket Head Cap Screws ASME B18. 3-2003 in A2 image
technical drawing of UNF Socket Head Cap Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 3/8
tpi threads per inch 24
b minimum thread length 1.25
dk head diameter 0.562
k max. maximum head height 0.375
t min. minimum recess depth 0.182
s drive size 5/16
Standard ASME B18.3/ASTM F837(CW)
all dimensions in inches
Datasheet
< View All Sizes
Description Sale Qtys Qty Price Breakdown Despatch Estimate
3/8 x 1/2 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17453 - 574 in stock
single screw for £3.28
or box of 10 for £12.58
or bulk of 50 for £48.10
£0.00  
3/8 x 5/8 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF36137 - 636 in stock
single screw for £3.08
or box of 15 for £15.91
or bulk of 75 for £58.25
£0.00  
3/8 x 3/4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17454 - 767 in stock
single screw for £2.80
or box of 40 for £29.55
or bulk of 200 for £105.73
£0.00  
3/8 x 7/8 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF36138 - 654 in stock
single screw for £3.29
or box of 20 for £25.21
or bulk of 100 for £86.61
£0.00  
3/8 x 1 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF10243 - 529 in stock
single screw for £3.29
or box of 30 for £32.98
or bulk of 150 for £123.48
£0.00  
3/8 x 1-1/4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF10244 - 344 in stock
single screw for £3.35
or box of 30 for £34.28
or bulk of 150 for £129.31
£0.00  
3/8 x 1-1/2 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF10245 - 421 in stock
single screw for £3.13
or box of 20 for £22.25
or bulk of 100 for £76.38
£0.00  
3/8 x 1-3/4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17455 - 70 in stock
single screw for £4.94
or box of 10 for £26.91
or bulk of 50 for £95.68
£0.00  
3/8 x 2 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17456 - 154 in stock
single screw for £4.29
or box of 8 for £17.82
or bulk of 40 for £63.94
£0.00  
3/8 x 2-1/4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17457 - 94 in stock
single screw for £4.06
or box of 10 for £20.05
or bulk of 50 for £70.31
£0.00  
3/8 x 2-1/2 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17458 - 69 in stock
single screw for £6.86
or box of 8 for £32.37
or bulk of 40 for £122.84
£0.00  
3/8 x 2-3/4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF36140 - 1 in stock
single screw for £6.62
or box of 4 for £17.76
or bulk of 20 for £63.90
£0.00  
3/8 x 3 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17459 - 38 in stock
single screw for £6.69
or box of 8 for £31.66
or bulk of 40 for £118.88
£0.00  
3/8 x 3-1/2 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17460 - 319 in stock
single screw for £6.48
or box of 4 for £17.25
or bulk of 20 for £62.42
£0.00  
3/8 x 4 UNF Socket Head Cap (Allen) Screw in A2 Stainless
WF17461 - expected in 11 to 17 days
single screw for £17.91
or box of 2 for £27.98
or bulk of 10 for £101.86
£0.00  
single screw for £3.28
or box of 10 for £12.58
or bulk of 50 for £48.10
£0.00
 
single screw for £3.08
or box of 15 for £15.91
or bulk of 75 for £58.25
£0.00
 
single screw for £2.80
or box of 40 for £29.55
or bulk of 200 for £105.73
£0.00
 
single screw for £3.29
or box of 20 for £25.21
or bulk of 100 for £86.61
£0.00
 
single screw for £3.29
or box of 30 for £32.98
or bulk of 150 for £123.48
£0.00
 
single screw for £3.35
or box of 30 for £34.28
or bulk of 150 for £129.31
£0.00
 
single screw for £3.13
or box of 20 for £22.25
or bulk of 100 for £76.38
£0.00
 
single screw for £4.94
or box of 10 for £26.91
or bulk of 50 for £95.68
£0.00
 
single screw for £4.29
or box of 8 for £17.82
or bulk of 40 for £63.94
£0.00
 
single screw for £4.06
or box of 10 for £20.05
or bulk of 50 for £70.31
£0.00
 
single screw for £6.86
or box of 8 for £32.37
or bulk of 40 for £122.84
£0.00
 
single screw for £6.62
or box of 4 for £17.76
or bulk of 20 for £63.90
£0.00
 
single screw for £6.69
or box of 8 for £31.66
or bulk of 40 for £118.88
£0.00
 
single screw for £6.48
or box of 4 for £17.25
or bulk of 20 for £62.42
£0.00
 
single screw for £17.91
or box of 2 for £27.98
or bulk of 10 for £101.86
£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 Cap Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 3/8
tpi threads per inch 24
b minimum thread length 1.25
dk head diameter 0.562
k max. maximum head height 0.375
t min. minimum recess depth 0.182
s drive size 5/16
Standard ASME B18.3/ASTM F837(CW)
all dimensions in inches
Datasheet
FSB logo CBI logo