How do you measure a head cap screw?

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads. Flat head screws are measured from the top of the head to the tip of the threads.

What grade are socket head cap screws?

Socket cap screws are often available in grade 12.9, meaning it has a UTS of 1200 MPa and will yield at 90% of this (1080 MPa).

What is the strongest socket head cap screw?

Metric Grade 12.9 Hex Cap Screws Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

Is standard for socket head cap screw?

Cheese-head screws with socket head cap type IS according to ISO 4762 (formerly DIN 912) or ANSI / ASME B18. 3. Designed with M6 thread in the lengths required for the fixing of pipe / tube clamps and hose clamps of the Standard Series according to DIN 3015, Part 1.

What is the height of the head of a #10 socket head cap screw?


Size Diameter Head Height
M8-1.25 8.00 8.00
M10-1.50 10.00 10.00
M12-1.75 12.00 12.00
M14-2.0 14.00 14.00

How hard are socket head cap screws?

The tensile strength is a minimum 180,000 psi for sizes 1⁄2′′ diameter and smaller and 170,000 psi for 5⁄8′′ diameter and above. Tensile strength may vary according to heat treatment and manufacturer.

What is an Allen head cap screw?

Socket Head Cap Screws, which are also known as Allen head screws are stock items at Lightning Bolt in many materials sizes. These screws come with a hexagonal cross-section socket in the head and require an Allen wrench or hex key to drive them into material and secure them into a structure.

How hard is a socket head cap screw?

Can standard lock washers be used with cap screws?

Use regular for Grade 2 hex cap screws and high strength alloy steel for Grade 5 and 8 hex cap screws. Tooth lock washers—internal, external, internal-external and countersunk external—create a ratchet action by biting into the nut or screw head and the surface it contacts.

Where are socket head cap screws used?

Socket cap screws are commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets.

What is a cap head screw?

A cap screw, by definition, is a machine bolt or screw that is threaded the to the cap and is normally fastened to a threaded hole rather than a nut. The picture of the “socket-head cap screw” accompanying this article would actually be a socket-head bolt, according to traditional definition.

What is a button head socket cap screw?

A button socket cap screw, also known as a button socket head cap screw, socket screw or Allen button socket bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole.

What are hex socket screws?

The hex socket screw, also known as the socket head cap screw, is a headed and externally threaded part designed for insertion through a close tolerance internally tapped hole and mated with a nut. Tension on the hex socket screw is induced by rotation of the screw head.

What is an allen head bolt?

Definition of Allen bolt . hardware. : a bolt with a hexagonal socket in its head that is designed to be used with an Allen wrench The Allen bolt is integral to the crank and remains in it when the crank is removed from the spindle.— Eugene A. Sloane, Sloane’s New Bicycle Maintenance Manual, 1981.