(208) Has a similar thread design as a socket head cap screw. However, the dome-shaped head is wider and has a lower profile than a socket head cap screw.
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. They are not recommended for critical, high-strength applications.
(48) Similar to a socket head cap screw except the head height is 50% of the standard size and the socket size is smaller.
Used in applications where the limited clearance would not accommodate the head of a socket head cap screw. Also used in counter-bored holes of material too thin for a socket head cap screw. However, because of their design, they cannot withstand the same preloads as a standard socket head cap screw.
(203) Has a similar thread design as a metric socket head cap screw. However, the dome-shaped head is wider and has a lower profile than a metric socket head cap screw. Generally manufactured in accordance with ISO Standard 7380.
(73) An externally threaded fastener with metric threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides, and a hexagonal recess. Generally manufactured in accordance with DIN Standard 912 or ISO Standard 4762.
(337) Has a similar design as a metric button head socket cap screw, but has an 90° countersunk flat head. Generally manufactured in accordance with DIN Standard 7991.
(1,317) An externally threaded fastener with metric threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides, and a hexagonal recess. Generally manufactured in accordance with DIN Standard 912 or ISO Standard 4762.
(937) An externally threaded fastener with unified threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides, and hexagonal recess.
Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance. Supplies greater tensile strength than equivalent sizes of hex cap screws while requiring less surface area or counter-bore since the fastener is internally wrenched.
(30) A dry seal plug is one having a tapered (3/4" diametral per 12") thread extending its entire length and designed to have its threads mesh tightly with those of a taper-threaded hole. A flush type plug is one having a tapered (7/8" diametral per 12") thread extending its entire length and designed to provide a flush condition with a standard tapped hole
(1,112) A headless screw threaded the entire length, with a hexagonal drive at one end and a point at the other end (e.g., cup, half dog, oval, flat, and cone).
Used for internal wrenching and where frequent disassembly or adjustment occurs.
