The metric low profile thin hex nuts defined in the DIN 936 standard published by the German Institute for Standardization (DIN) have similar but slightly different heights to the hex compression nut defined in the DIN 439 standard. They are thin hex nuts that are half as thick as a regular hex nut. They are often used as locknuts where they are screwed against a standard nut, or in any situation where a standard nut is too thick for an application, a hex jam nut is a very useful alternative. It is generally manufactured from marine grade stainless steel M8 to M42, as well as a brass and steel zinc alloy with right and left threads.
Another standard in this regard is the following standard published by the British Standards Institute (BSI): BS 3692 ISO Metric precision hex bolts, screws and nuts, specification.
Low profile hex jam nuts are used as counter nuts to prevent vibration from loosening a bolted joint. Before nuts were developed with self-locking capabilities, two locknuts were tightened together so that the nuts would not loosen over time. The first nut is held with a wrench, while the second nut is either tightened or tucked against the first to lock both nuts in place. The low profile design makes this nut ideal for low backlash applications. Overall height is similar to standard hex nut with jam nuts doubled.
Briefly, the jam nut is a low profile hex nut and is used when putting two nuts together or in tight spaces. The low profile hex nut is used by squeezing them into a standard nut that locks them together and is available in any size and any material. These nuts are also used to secure an object to a fastener without applying force to that object.
Our organization, among the numerous tests, measurements, analyses, and evaluations it provides for businesses in various sectors, also offers testing services for low-profile thin hexagonal nuts under the DIN 936 standard and for ISO metric precision hexagonal bolts, screws, and nuts under the BS 3692 standard, thanks to its trained and expert staff and advanced technological equipment.
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