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Stainless Steel DIN7991 Countersunk Head Hex Socket Cap Screw

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Features

Quick Details:

Material: Stainless Steel 304/316

Finish: Plain

Head Type: Flat countersunk head

Drive: Hex socket drive

Diameter: M2-M24

Thread system: UNC UNF thread available.

Specificiation

DIN7991 Coutersunk head socket screw
d1	M2	M2,5	M3	M4	M5	M6	M8
d2	4	5	6	8	10	12	16
k	1.2	1.5	1.7	2.3	2.8	3.3	4.4
s	1.3	1.5	2	2.5	3	4	5
t	0.75	0.8	1.2	1.8	2.3	2.5	3.5
a	90°	90°	90°	90°	90°	90°	90°
Full thread length up to L	-	-	20	25	30	35	40
nom. thread length	-	-	12	14	16	18	22
d1	M10	M12	M14	M16	M20	M24	grade4.8/8.8/10.9/12.9/A2 A4
d2	20	24	27	30	36	39
k	5.5	6.5	7	7.5	8.5	14
s	6	8	10	10	12	14
t	4.4	4.6	4.8	5.3	5.9	10.3
a	90°	90°	90°	90°	90°	60°
Full thread length up to L	40	50	50	60	70	90
nom. thread length	26	30	34	38	46	54

Description

Flat countersunk head socket cap screw features a tapered flat head, it is screwed into a countersunk recess to sit flush with base material surface.

Hex socket cap screw is a type of machine screw, it features an internal hex recess, this drive requires an allen key to tighten or loosen the screw, so this type of screw also called allen key screw or allen screw. Hex socket screws can be fully threaded or partially threaded.

Hex socket screw comes in a variey of head types.

Standard hex socket head cap screw like DIN912 or ASME B18.3;

Low profile socket head cap screw like DIN7984

Flat head socket cap screw like DIN7991 or its inch system standard

Button head socket cap screw like ISO7380 or its inch system standard

Flanged button head socket cap screw like ISO 7380-2 or its inch system standard.

Machine screw consists of a head and a threaded shank, it is intended for use with a pre-drilled interior hole or a nut.

There is variety of machine screws with different heads, materials.

We list some of the most popular machine screw types:

Head types outlined below refer to the overall shape of the machines screws head, it is important for users to choose the right head types. You can get our head type and drive types in our download list.

Thumb Screws features a large and knurled head which is easy to grip and turn by hand.

It Is a type of machine screw that are installed by screwing the fastener into a pre-drilled or tapped hole.

We have flat knurled head thumb screw, knurled head flared collar thumb screw with shoulder, spade thumb screw, wing screw.

Camera screw is designed to install the camera to the gimbal mounting side.

it features a reduced shank underneath the head and a D ring on head, which makes it easy and fast to work.