1/2 (13) UNC 1 3/4 Inch Socket Countersunk Machine Screw, A2 Stainless Steel - ANSI B18.3

Corrosion Resistant Machine Screw

A2 stainless steel socket machine screw offering high corrosion resistance, ideal for both internal and external use. Manufactured with a countersunk head for a flush finish every time and a socket drive recess for easy application of the correct torque.

Ideal for many uses including precision engineering, metal framing, panel assembly, electronics, brackets, and any situation where high-strength, low-profile fasteners are needed.

A versatile socket countersunk machine screw used by DIY enthusiasts and professionals alike.

Socket Machine Screw Specifications

• Thread diameter (TD): 1/2 (13) UNC
• Length (L): 1 3/4 Inch
• Head diameter (HD): 0.93 max
• Thread pitch: 13 threads per inch
• Socket (Allen) Size: 5/16 inch
• Countersunk depth: 0.25 inch
• Material: A2 stainless steel
• Conformity: ANSI B18.3
  

Socket Machine Screw USPs

• Flush finish: The countersunk head ensures the screw sits flush with or just below the surface of the material, giving a sleek and secure finish.
• Allen / hex socket drive: Allows for high torque tightening and better control using a 2 mm hex key.
• Corrosion resistant: Manufactured in A2 stainless steel that offers high corrosion resistance making them ideal for both internal and external applications.
• Standards Compliant: Designed to ISO 10642 / DIN 7991, ensuring consistency, reliability, and compatibility with precision engineering.
  

Frequently Asked Questions (FAQs)

Why use a socket (Allen) drive instead of a slotted or Phillips head?

A hex socket drive allows higher torque to be applied safely, which helps generate a stronger clamping force. It also provides better control during installation and reduces the risk of "cam-out."

How corrosion resistant are these machine screws?

These machine screws offer a high corrosion resistance making them ideal for both internal and external applications.

Will this screw sit flush on the materials surface?

Yes, the countersunk head allows the screw to sit flush or nearly flush when installed in a countersunk hole.

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