Flat-head screw ISO 10642 (DIN 7991) 10.9 M20 x 40 - zinc plated

Flat-head screw ISO 10642 (DIN 7991) 10.9 M20 x 40 - zinc plated

SKU: 7991 10.9 20 40 A2K
Category: Countersunk screws

Length

3,68 £

incl. 19% VAT , plus

From	Unit price / pcs
5	3,10 £*
10	2,43 £*
25	1,84 £*
100	1,47 £*

Delivery time:
3 pieces in express stock:
1 - 3 Workdays (Mo.-Fr.)
450 pieces in stock:
3 - 5 Workdays (Mo.-Fr.)

pcs

Description
Standard

Flat-head screw

Standard: ISO 10642

Dimension: M 20 x 40

Material: Steel zinc plated

Strength class: 10.9

Drive: Hexagon socket

Also known as:

countersunk screw, flat-head screw with hexagon, compare DIN 7991

(The article photos are examples and reflect the shape and color. Dimensions and material may different. The article description applies. Depending on the batch, the screws can have a shaft. If screws with shaft are required, please contact us and we will check our stock.)

Diameter:	M 20
Length:	40 mm
Material:	steel
Standard:	DIN 7991
Surface:	zink plated
Quality/Grade:	10.9
Item weight:	0,10 kg

Countersunk screws according to DIN 7991 / ISO 10642

For countersunk screws the entire length is measured including the head !

Dimensions (Drawing see above):

Measure	M 2	M 2,5	M 3	M 4	M 5	M 6	M 8	M 10	M 12	M 16	M 20
d_{k mt}	4,09	5,08	5,81	7,96	10,07	12,16	16,43	20,69	24,81	30,61	36,75
k_max.	0,75	0,8	1,86	2,48	3,1	3,72	3,72	4,96	6,2	8,4	8,8
s	1,3	1,5	2	2,5	3	4	5	6	8	10	12
b*			18	20	22	24	28	32	36	44	52

d_{k mt}	=	head diameter
k_max.	=	maximum height of head
s	=	wrench size of hexagon socket
b*	=	min. length of thread (usually countersunk screws are full threaded, but depending on size and production charge length of thread can differ. If you need a specific length of thread please contact us.)