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M20 Socket Head Countersunk Screws ISO 10642 (DIN 7991) in A2 Stainless Steel

A countersunk headed screw conforming with ISO 10642 or DIN 7991, 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. The head diameter is slightly larger than that of the equivalent DIN 965 Phillips or Pozi driven screw.
Socket Head Countersunk Screws ISO 10642 (DIN 7991) in A2 image
technical drawing of Socket Head Countersunk Screws ISO 10642 (DIN 7991)
Technical Summary
d nominal diameter M20
thread pitch thread pitch 2.50
dk max. maximum head diameter 36.75
dk min. minimum head diameter 35.40
k max. maximum head height 10.160
k min. minimum head height 9.037
s max. maximum drive size 12.212
s min. drive min. 12.032
b minimum thread length 60
t max. maximum recess depth 6.40
t min. minimum recess depth 5.60
e width across corners 13.716
Standard ISO 10642
Material A2 Stainless Steel
all dimensions in millimetres (mm)
html graphic ISO 10642 Standard HTML
pdf graphic ISO 10642 Standard PDF
Description Sale Qtys Qty Price Breakdown Despatch Estimate
M20 x 30mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76425
£0.00
M20 x 35mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76426
£0.00
M20 x 40mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76427
£0.00
M20 x 45mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76428
£0.00
M20 x 55mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76430
£0.00
M20 x 60mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76431
£0.00
M20 x 65mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76432
£0.00
M20 x 70mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76433
£0.00
M20 x 75mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76569
£0.00
M20 x 80mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76570
£0.00
M20 x 90mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76571
£0.00
M20 x 100mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76563
£0.00
M20 x 110mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76564
£0.00
M20 x 130mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76566
£0.00
M20 x 140mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76567
£0.00
M20 x 150mm Socket Head Csk (Allen) Screw in A2 Stainless
WF76568
£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 Socket Head Countersunk Screws ISO 10642 (DIN 7991)
Technical Summary
d nominal diameter M20
thread pitch thread pitch 2.50
dk max. maximum head diameter 36.75
dk min. minimum head diameter 35.40
k max. maximum head height 10.160
k min. minimum head height 9.037
s max. maximum drive size 12.212
s min. drive min. 12.032
b minimum thread length 60
t max. maximum recess depth 6.40
t min. minimum recess depth 5.60
e width across corners 13.716
Standard ISO 10642
Material A2 Stainless Steel
all dimensions in millimetres (mm)
html graphic ISO 10642 Standard HTML
pdf graphic ISO 10642 Standard PDF