Stainless Steel Hex Socket CSK Head Cap Screw

Stainless Steel Hex Socket CSK Head Cap Screw - Grade 202, 304, 316, A2, A2-70

A Hex Socket CSK Head Cap Screw Grade 202, 304, 316 is a fastener with a countersunk (conical) head and an internal hexagonal drive (Allen key). The head is designed to sit flush with or below the surface of the material it is fastened into.

ANSI B 18.3
Size	Length
Size	F/T	H/T
1/4"	3/4" - 2 3/8"	1 3/4" - 2 3/8"
5/16"	3/4" - 2 3/4"	2" - 3"
3/8"	3/4" - 2 3/4"	2 1/4" - 3"
7/16"	1" - 3"	2 1/2" - 3 3/4"
1/2"	1" - 3"	2 1/2" - 3 3/4"
5/8	1 5 /8" - 6"	3 1/4" - 6"

Hex Socket Flange Button Head Screw – Metric Specification Table

Thread Size (M)	Thread Pitch (mm)	Head Diameter (D)	Head Height (K)	Socket Size (S)	Standard	Material Options
M3	0.5	6.0 mm	1.65 mm	2 mm	DIN 7991 / ISO 10642	Steel 8.8, SS A2/A4
M4	0.7	8.0 mm	2.2 mm	2.5 mm	DIN 7991 / ISO 10642	Steel 8.8, SS A2/A4
M5	0.8	10.0 mm	2.5 mm	3 mm	DIN 7991 / ISO 10642	Steel 8.8, SS A2/A4
M6	1.0	12.0 mm	3.0 mm	4 mm	DIN 7991 / ISO 10642	Steel 10.9, SS A2/A4
M8	1.25	16.0 mm	4.0 mm	5 mm	DIN 7991 / ISO 10642	Steel 10.9, SS A2/A4
M10	1.5	20.0 mm	5.0 mm	6 mm	DIN 7991 / ISO 10642	Steel 10.9, SS A2/A4
M12	1.75	24.0 mm	6.0 mm	8 mm	DIN 7991 / ISO 10642	Steel 10.9, SS A2/A4

Head Height (K) is thinner than standard hex bolts to allow for flush mounting.
Socket Size (S) refers to the Allen key size needed.
Strength Class: Typically 8.8, 10.9 for carbon steel, or A2-70/A4-80 for stainless steel.
These are commonly used in precision equipment, machine panels, electronics, and aerospace assemblies.

Introducing the Hex Socket CSK Head Cap Screw – engineered for precision and durability. This versatile fastener features a countersunk design that ensures a seamless finish while providing optimal torque performance through its hex socket drive. Ideal for applications requiring strength and reliability, our cap screw stands out in both technical specifications and aesthetics. Elevate your projects with the unparalleled quality of our Hex Socket CSK Head Cap Screws!

Tensile Strength

≥700 MPa

Yield Strength

≥1100 MPa

Elongation

≥12%

Hardness Max

250 HB

Materials

Stainless Steel

Steel Grade

Finishing

Polished
Geomet
Dacromet
Teflon
Hot-Dip Galvanzing
Zinc (Yellow, White, Blue)
Black Qxide

Thread

Standards

Hexagonal Socket

The hexagonal recess on the screw head allows for use of a hex wrench, also referred to as an Allen wrench, to tighten or loosen.

Countersunk Head

The countersunk head is designed to fit snugly into a pre-drilled, tapered cavity, creating a smooth and level appearance on the surface.

Flush Mounting

With its countersunk design, the screw head remains concealed, resulting in a polished and sophisticated look.

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