A socket cap screws are machine screws with a cylindrical barrel shaped head containing a hexagonal socket. The head has a smaller diameter than most other machine screw heads, typically just 1.5 times the nominal thread diameter.
Is a socket head cap screw a bolt?
A socket cap screw, also known as a socket head cap screw, socket screw, or Allen socket bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. They are typically driven with a socket wrench or Allen hex key and usually have knurled heads.
What material is a socket head cap screw made of?
Socket Head Cap Screws. Socket Head Cap Screws are externally threaded fasteners with unified threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides and hexagonal recess, made from alloy steel, stainless, or nylon.
What is Grade 8 cap screw?
Cap Screw Grade Markings. Grade 8 fasteners are manufactured of medium-carbon alloy steel for the most demanding applications. These fasteners are then quenched and tempered to superior strength and hardness qualities. The grade marking on a Grade 8 fastener is six equally spaced lines coming out from the center of the head.
What is the difference between a cap screw and a machine screw?
machine screws are a subgroup (of cap screws) and are typically up to 5/16 in diameter, fully threaded, but that distinction is rather blurry – a machine screw with hexagonal recess can be called a cap screw or a machine screw and both names will be correct.
What is a socket screw used for?
A socket screw, or Allen head screw or bolt, as it is otherwise known, is a type of fastener that uses a hexagonal wrench often referred to as an Allen wrench or Allen key to tighten and remove. This fastener is used in a myriad of applications where a strong bolt or screw is called for.
