H & S Socket Head Cap Screw Product Page

Socket Head Cap Screw
Alloy Steel Socket Head Cap Screw
Description	An externally threaded fastener with unified threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides and hexagonal recess, made from alloy steel.
Applications / Advantages	Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance. Supplies greater tensile strength than equivalent sizes of Grade-5 or Grade-8 hex head cap screws while requiring less surface area or counter bore since the fastener is internally wrenched
Material	Cap screws shall be made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)—Carbon: 0.31% minimum; Phosphorus: 0.045% maximum; Sulfur: 0.045% maximum.
Stainless Steel Socket Head Cap Screw
Description	An externally threaded fastener with unified threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides and hexagonal recess, made from austenitic Stainless steel.
Applications / Advantages	Although stainless socket cap screws have significantly less tensile and yield strength than alloy sockets, they have superior resistance to corrosion. They retain their mechanical and performance capabilities at higher than ambient temperatures.
Material	Cap screws shall be made from one of the following stainless alloys: 302, 303, 304, 305, 384, XM1 or XM7.

Button Head Cap Screw
Description	Has similar thread design as a socket cap screw. The dome-shaped head is wider and has lower profile than a socket cap screw.
Applications / Advantages	Used when a wider bearing surface or a smoother, more finished appearance is desired. Button head cap screws do not afford the strength of socket head cap screws and are designed for light fastening applications. Not recommended for critical, high strength applications.
Material	Alloy: shall be made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)—Carbon: 0.28 to 0.50%; Phosphorus: 0.035% maximum; Sulfur: 0.040% maximum. Stainless Steel: is made from one of the following stainless alloys: 302, 303, 304, 305, 384, XM1 or XM7

Socket Flat Head Cap Screw
Description	Similar in design to a socket button head cap screw but with an 82° countersunk flat head
Applications / Advantages	Used when a flush mounting, high strength screw is required. Commonly used in tools and dies where moving parts pass over the fastened area.
Material	Alloy: is made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)—Carbon: 0.28 to 0.50%; Phosphorus: 0.035% maximum; Sulfur: 0.040% maximum. Stainless steel: is made from one of the following stainless alloys: 302, 303, 304, 305, 384, XM1 or XM7.

Low Head Socket Cap Screw
Description	Similar to a standard alloy socket cap screw except the head height is 50% of the standard’s and the socket size is smaller. The low-head style is supplied only in plain steel.
Applications / Advantages	Used in applications where the limited clearance would not accommodate the head height of a standard socket cap screw. Also used in counter bored holes of material too thin for a regular socket cap screw. However, because of their design, they cannot withstand the same preloads as a standard socket head.
Material	Cap screws shall be made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)—Carbon: 0.31% minimum; Phosphorus: 0.045% maximum; Sulfur: 0.045% maximum.

Socket Head Shoulder Screw
Description	A hex socket head screw with an enlarged, unthreaded, cylindrical shoulder under the head , the diameter of which serves as the basis for the derivation of the nominal size.
Applications / Advantages	For rotation or sliding applications, such as pulley shafts, in punch and die work, or for use as a bearing pin. Shoulder screws are also referred to as “stripper bolts”.
Material	Shoulder screws shall be made fabricated from an alloy steel having one or more of the following elements: Chromium, nickel, molybdenum or vanadium, in sufficient quantity to assure the hardness specified below.