JM Hardware® Machine Screw

Speed nuts, also known as spring nuts or sheet metal nuts, are locknuts made from spring steel. The fastener is designed with two sheet metal prongs that act as one thread. It functions both as a lock washer and a nut and when it is tightened the base of the nut, which arched, applies a force to the fastener locking it from loosening under vibrationsThe U-nut is a fastener composed of two flaps in clip form with two external raised thread forms. The design of this nut means that a double elastic force is exerted when tightened. This nut can be held in place manually when tightening. No special tools are required to mount U-nuts, and they can be assembled much more quickly and easily than conventional nuts. The self-locking feature means that costly operations such as tapping, welding or riveting can be avoided. It can also be used with fragile materials such as glass, plastic or enameled surfaces. In these cases the resilience of the nut avoids cracks or damage to the application area.This nut locks with tightening torques much lower than for standard nuts due its great resilience.It is normally mounted on the edge of a panel but it can also be used in a rectangular mounting hole in the middle of a panel.

1. Material: Low carbon steel2. Diameter: 2.5-10mm or customized3. Surface: zinc plated or ruspert(Blue/Yellow/Red/Green)4. length: 6-105 mm or customized5. Quality control: RoHS tester , callipers , salt spary tester , 3D coordonate measuring instrument

Split lock washers, also known as spring lock washers,  are designed with a split at one point and bent into a helical shape. This causes the washer to exert a spring force between the fastener’s head and the substrate, creating more friction and resistance to rotation.Lock washers are specially designed to keep threaded fasteners from loosening. They prevent vibrations and some have external teeth to prevent rotation. These washers are often found in airplanes and in structural applications.

JM Hardware® carriage bolt has a square shoulder under a rounded head which resists turning when the nut is tightened or removed. They are good for wood-to-wood connections when the head may not be accessible for tightening. They may be used in the construction of docks, swing sets and decks as well as other surfaces where a smooth finish is needed.

Tapping Screws, Self-Tapping Screws or Sheet Metal Screws create their own mating thread in pre-drilled holes. Type A and AB are the more typical sheet metal screws with a fairly sharp point. The Type A tapping screws have wider spaced threads for self-starting in thin metal or resin filled plywood. Type AB self-tapping screws have more threads per inch that are used in brittle material. Type B tapping screws have a blunt end that are best suited for thru-holes in plastics, thin metal, and non-ferrous materials. JM Hardware® Tapping Screws have round heads and have multiple starting threads.Sheet metal screws are designed for connecting thinner metal objects to one another or connecting metal to wood, plastic, and other materials. Many can start their own pilot hole.

Drywall Screws are a specialized self-tapping fastener with a bugle head and cylindrical shaft designed to attach drywall to wood or metal studs. The sharp point allows these screws to penetrate undrilled plaster and tapered shape of an arc keeps drywall from cracking plaster.Drywall screws create threads as they are drilled into drywall without damaging the material. Among other tasks, these screws may be used to secure drywall to wood or metal studs.

Chipboard screw is a product that has undergone a heat treatment process and is suitable for installation of electric tools. To a large extent, it can replace the use of ordinary wood screws (wood screws are not heat-treated). At the same time, wood screws are produced by the first proposed method of shrinking rods by navigation marks, which not only saves materials, but also has sharper threads. Fiberboard nails are mostly based on German standards, and the model is mainly DIN7505.

Wood screws are also called wood screws, which are similar to machine screws, but the thread on the screw is a special wood screw thread, which can be screwed directly into the wooden component (or part) to use a metal (or non- The metal) part is firmly connected to a wooden component. This connection is also a detachable connection.Wood screws are specifically designed for connecting wood to wood. They usually require pre-drilled holes.