Bolts and Machine Screws – Metric
Hex Head Bolts ISO 4014 (DIN 931)
The hex head bolt is the most common type of fastener, and is designed to be tightened with a standard spanner. A standard hex bolt is a very common bolt in most assemblies.
Socket Head Button Screws ISO 7380 part 1
A popular choice of screw when aesthetics are important or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ISO 7380, and almost always fully threaded.
Pozi Pan Machine Screws ISO 7045 (DIN 7985Z)
A Machine screw with a pozi drive, designed to be tightened with a screwdriver. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary. Conforms with ISO 7045 or DIN 7985.
Socket Head Countersunk Screws ISO 10642 (DIN 7991)
A countersunk headed screw conforming with ISO 10642 or DIN 7991, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank. The head diameter is slightly larger than that of the equivalent DIN 965 Phillips or Pozi driven screw.
Socket Head Cap Screws
Also known as an Allen screw or Allen bolt, or simply a cap screw. Socket Head Cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to ISO 4762 or DIN 912, the contact surfaces of this screw or bolt are protected from external damage.
Dog Point Grub Screws ISO 4028 (DIN 915)
Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a square profiled end called a dog point on the opposite end, as to ISO 4028 or DIN 915.
Cup Point Grub Screws ISO 4029 (DIN 916)
Unit 5, The Cobalt Centre, Kineton Rd, Southam CV47 0FD