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 Cap Screws ISO 4762 (DIN 912)
Commonly known as an Allen screw or Allen bolt. 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, also known as a Allen keys is required to fasten this type of bolt. The contact surfaces of this screw or bolt are protected from external damage. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination. A fully threaded variant is also available.
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.
Hex Head Flange Bolts ISO 1665 (DIN 6921)The DIN 6721 flange bolt is a hexagon headed bolt or screw incorporating a flange, negating the need for a washer. Flange bolts are a more attractive alternative to their DIN 931 and DIN 933 hex driven counterparts. Typically used where The flange offers protection for the bolted component where the driving tool may otherwise scratch it’s surface. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank.
Socket Head Cap Screws With Fine Thread ISO 4762 (DIN 912)Fine Pitch Socket Head Cap Screws made in the UK and with a material grade of A4-80, suitable for use in salt water conditions. Fine pitch screws are used in conjunction with fine pitch nuts which are also available on this website. The extra thread engagement gained from the finer pitch gives a more secure and stronger fitment. Used where high levels of strength are required – a fine pitch bolt has a larger stress area creating better tension than its coarse pitch counterpart, also they are less inclined to loosening through vibration due to the thread incline being smaller.
Socket Head Cap Screws With Full Thread ISO 4762 (DIN 912)
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. This variant is supplied fully threaded regardless of length of screw.
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