Metric Nuts

Hexagon full nut to DIN standard 934 with standard metric coarse pitch. Typically fitted with a spanner or ratchet with socket. The most popular nut type, and used for decades on all types of assemblies throughout the world. Can be used in conjunction with Hexagon Thin nuts in a "locking" formation for a more secure fitment. Fine pitch and left hand thread variants are also available immediately below this item. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Fine Pitch Threaded hexagon full nut to DIN standard 934. Typically fitted with a spanner or ratchet with socket. The significantly more unusual Fine Pitch variant of the standard Coarse Pitch hex nut for use where more thread engagement is desired. Only for use in conjunction with a matching Fine Thread Pitch bolts or screws.

Hexagon full nut with standard metric coarse pitch, but with a Left Handed Thread. To DIN 934. Can only be used in conjunction with Left Hand Thread screws and bolts.

Nut conforming to DIN 439. Also known as a half nut, thin nut, or jam/lock nut. Typically fitted with a spanner or ratchet with socket, often used in pairs or in conjunction with a hexagon full nut in a locking arrangement. A popular nut type, and used for decades on all types of assembly throughout the world. Fine Pitch and Left Hand Thread variants are also available immediately below this item.

Nut conforming to DIN 439 but with Fine Thread Pitch. Also known as a half nut, thin nut, or jam/lock nut. Typically fitted with a spanner or ratchet with socket, often used in pairs in a nut locking arrangement. A popular nut type, with a more unusual Fine Thread Pitch for when more thread engagement is required. Must be used in conjunction with the appropriate Fine Thread Pitch bolts or screws.

Hexagon thin, jam, locking or half nut with standard metric coarse pitch, but with a Left Handed Thread. To DIN 439. Only for use in conjunction with Left Handed Thread bolts or screws.

Prevailing torque type nut manufactured to DIN 982. Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. This is the higher profile (Type P) variant with more available thread engagement and is typically fitted with a spanner or ratchet with socket. A lower profile, where perhaps space is at a premium is also available under DIN 985 (Type T).

Prevailing torque type nut manufactured to DIN 985. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. This is the standard profile variant (Type T), a higher profile option is available under DIN 982 (Type P). Typically fitted with a spanner or ratchet with socket.

These fine pitch metric nyloc nuts are manufactured to DIN 985 and are the low Type T. Nylocs are also known as prevailing torque or locking nuts. As they are tightened onto a bolt, the bolt will cut a thread into the nylon part, making it less likely to loosen. The fine pitch means that there are more threads per centimetre, giving more engagement and adjustability to the fixing. They need to be used in conjunction with the same pitch bolt. Typically fitted with a spanner or ratchet with socket. We recommend that anti-galling measures are taken on installation of stainless steel variants of these items.

Slotted or split beam type hexagon all metal locking nut . Manufactured in the UK with the Aerotight trademark. Undersize threaded sections on top portion of nut mean that when tightened into position the undersize section is forced outward creating high friction and a more secure 'locked' fitment. A locking nut for use in higher temperatures where a locking nylon ring nut would be unsuitable.

An elliptical offset type hexagon locking nut. Of all metal construction, and can be reused indefinitely. A locking nut for use in higher temperatures where a locking nylon ring nut would be unsuitable.

Prevailing Torque Nuts are a type of all metal locking nut. Designed to lock and resist vibration or shock. Part of the top threads on the nut deform to create a locking action by increased friction, meaning they will not spin freely and torque via a spanner would be needed to fit and remove - hence the name Prevailing Torque. Ideal for applications that require protection against vibratory and other equally dynamic forces. Being All Metal, they do not suffer adversely from high temperatures or chemical contact like other materials such as plastic (used in Nyloc Nuts). Used frequently in Farming Machinery, Automotive and Production Processes.

A popular nut used in applications where aesthetics are important, giving an attractive look. Domed end also ensures a smooth snag-free finish protecting both the fixing and any foreign body that may come into contact . Also known as an Acorn Nut, these nuts are manufactured to DIN 1587. Also available with a Nyloc insert to DIN 986. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

A prevailing torque type locking version sharing the characteristics of the DIN 1587 dome nut. Incorporating a nylon insert to help prevent loosening when fitted. Conforms to DIN 986.

A closed end nut often used when a professional attractive finish is called for. Also the cap helps protect the fixture from foreign object ingress/damage and gives a nice smooth snag-free surface. Conforms to DIN 917.

An hexagon nut with incorporated flange, to DIN 6923. The flange offers protection for the bolted component where the driving tool may otherwise scratch it's surface. The flange also lessens the need to use a washer. This particular version has serrations on the base. A non-serrated variant is also available.

An hexagon nut with incorporated flange, to DIN 6923. The flange offers protection for the bolted component where the driving tool may otherwise scratch its surface. The flange also lessens the need to use a washer. This particular version is non-serrated on the base. A serrated variant is also available. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Unbrako Durlok® self locking, anti vibration hex flange nuts. These serrated flanged hex nuts are designed to pair with the Unbrako Durlok® self locking serrated flanged bolts. They both have a high tensile strength of 12.9 and a black oxide/self coloured finish. These heavy duty fasteners are suitable for situations where vibration and jarring occurs and where the joint is subject to high loads. They can be reused, as they are unlikely to be damaged by the adjoining surfaces. Durlok® nuts and bolts are manufactured from alloy steel and are through hardened to give the same hardness from the tooth surface to the core. Durlok® Fasteners can be used at high temperatures up to 300°C.

A prevailing torque type hexagon nut incorporating a flange and nylon insert to help prevent loosening when fitted. This particular version is non-serrated on the base of the flange. A serrated version is also available. Manufactured to DIN 6926.

A prevailing torque type hexagon nut incorporating a flange and nylon insert to help prevent loosening when fitted. This particular version has serrations on the base of the flange. A non-serrated version is also available. Manufactured to DIN 6926.

A hexagon nut 1.5 x its nominal diameter in height. Used in clamping applications that require frequent removal and re-fitting. Flat at one end and spherical at the other, so can be used in conjunction with conical seat washers. Manufactured to DIN 6330

A hexagon nut 1.5 x its nominal diameter in height with a collar, therefore negating the need for a washer. Used in clamping applications that require frequent removal and re-fitting. Manufactured to DIN 6331

Hex nuts manufactured to DIN 936 are a low type hex nut. Their height is between a full nut (DIN 934) and a thin/half nut (DIN 439). They can also be known as thin nuts or jam nuts and are often used in conjunction with other nuts as a lock nut. The slim flat profile of these hex nuts makes them useful where space is limited or where there is only a few threads of a bolt to engage with.

Popularly employed where frequent hand tightening and untightening of joints is required. To the American form, with less rounded, squared off wings. Similar to DIN 314/315. Please note that the wing span may vary between batches.

Popularly employed where frequent hand tightening and untightening of joints is required. To the German Form with slightly larger, rounded wings. To DIN 315. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Knurled Thumb Nuts manufactured to DIN 466. These examples are the high profile thumb nuts and feature knurling for a more assured grip. Made from machineable A1 grade stainless steel, so benefitting from good anti-corrosion properties. Designed to be located and fitted by hand, even in more challenging applications and giving an attractive finish when used.

Compared to standard hex nuts, square nuts have a greater surface contact with the part being fastened, and therefore provide greater resistance to loosening. They are also much less likely to become rounded-off after repeated loosening/tightening cycles. Manufactured to DIN 557.

A thin or half nut variation of the standard DIN 557 square nut. To DIN 562.

Slotted Sleeve Nuts also known as Slotted Barrel or Case nuts. These examples have a slotted raised/oval countersunk head. Internally threaded and giving a smooth flush attractive finish they require a standard flat head screwdriver for fitting. Available in A2 stainless steel, giving great corrosion resistance.

Hexagon Coupling Nuts also known as a long nut, these DIN 6334 connector nuts are typically employed in joining sections of threaded bar/studding together where required.

A slotted, castellated or castle nut gets its name from the slot's resemblance to the crenellations of a typical castle. These nuts are usually paired with a split pin or R-clip to form a positive locking device.

Hexagon Coupling Nut also known as an Extension Nut, used for joining two male threads, usually threaded bar/studding but also used on piping. The hexagon shape to the outer of the nut allows for tightening with a spanner /wrench. Sold in various lengths dependent on the application requirements.

Round Coupling Nuts similar to DIN 6334 but with a smooth rounded finish as opposed to hexagonal. Used when connecting two pieces of threaded bar/studding. Please note that these items are not produced to a recognised standard and therefore some dimensions may vary.

Shear nuts are a permanent high security fastener that do not require specialist tooling to fit. They consist of a threaded cone section with a hexagonal head at the top. The hexagonal unthreaded part of the nut is designed to shear off as it is tightened at a pre-determined torque setting. This leaves behind the tamper proof cone which is very difficult to remove as there is no drive or grip. Great for uses where a permanent anti-vandal fixing is needed and used in schools and hospitals as well as the fencing industry and car industry.

Counter Nut also known as a Pal Nut, are a stamped nuts made from sheet metal. They are designed to fit over a normal nut and lock it into place by using a series of protruding flanges that grip the host nut securely. Mainly used in conjunction with a standard hexagon nut. Manufactured to DIN 7967.

A hexagon nut designed for welding to a part to form a threaded insert. The design incorporates a locating boss and welding projections. Conforms to DIN929.

A square profile nut designed for welding to a part to form a threaded insert. The design incorporates a locating boss and welding projections. Conforms to DIN928.

Metric Cage Nuts, also known as Captive Nuts or Clip Nuts. The captive nut (usually square in shape), is enclosed in a surrounding cage ready for engaging with a screw later in the assembly process. Due to the 'floating' nature of the nut in the cage, they can be used for slightly adjusting any alignment issues during assembly Perfect for use in the mounting rails of equipment racks such as Data Cabinets.

Designed for use when woodworking, providing a threaded insert once fitted. For use on both soft and hard woods, simply drill out a pilot hole of the correct size, hammer into place to give a receiving threaded insert wherever needed. The design incorporates four teeth or prongs for biting into the workpiece. A2 Stainless Steel is suitable for outdoor use with such items as garden furnishings or childrens play equipment. Bright Zinc Plated (BZP) are generally for indoor use or where corrosion is not a concern. Please note that these items are not defined by a standard, and so design features and dimensions can vary between batches.

The main function of slotted round nuts is to hold parts that do not require any specific preload force. Designed to be tightened with a flat head screwdriver and used in low stress situations. The round shape is aesthetically pleasing, but they can also be easily recessed into a surface to give a clean, flush finish. Slotted Round Nuts are used in a wide range of applications for electrical engineering and machine construction. DIN 546 applies to slotted round nuts, with sizes from M1 to M20.

Slotted Round Nuts manufactured to DIN 1804. A nut requiring the use of a C Spanner (DIN 1810) or Hook Spanner. One surface of the nut protrudes and should be used as a mating surface.

These plastic caps are designed to cover metric hexagon nut or bolt heads. Made from Polyethylene, these caps provide an attractive finish and offer some additional protection against weathering and accidental damage. Available in black or white.