For bolts with an external thread diameter of 6 mm, an M8 nut is used, the dimensions of which we will consider in this article. It is made of galvanized steel, the internal thread pitch is large, but must correspond to the thread pitch of the bolt or stud itself. Also in production there are products with small threads. They are used less frequently, and are often used in mechanical engineering as a bearing connecting unit due to a greater pitch and better fastening of elements.
Typical M8 Nut Sizes
Nuts are metal parts with a hole in the center, inside which there is a thread that matches the thread of the bolt.
The defining dimensions of the M8 nut is the distance between the parallel faces.
- The internal diameter of the thread is 8 mm.
- Thread pitch - 1.25 mm (coarse thread).
- For fine cutting, the thread pitch is 0.3-0.7 mm, cutting is done on special machines on order for studs and anchor joints.
- The external circuit is a 13 mm turnkey hexagon.
- The total outer diameter is 14.38 mm.
- The thickness of the nut, depending on the manufacturer and the destination, is in the range of 4.8-6.0 mm.
- Product strength class 8.0 according to GOST 5915-70.
The dimensions of the M8 nut comply with the requirements of the International Organization for Standardization.
Scope of application
It is used as the main fastener for removable machine parts, it is used with a number of other fasteners, complete with anchors, studs, bolts, as well as in special fastening systems with welded structures. We examined the dimensions of the M8 nut, now we present their features.
Design features:
- Furniture fittings. With the internal diameter of the thread, they do not have an external hexagon. Instead, steel clamps are used that clog into the wood;
- Lock nuts and locknuts. Used for durable clamping design;
- Cap nuts. They are used for decorative purposes, on the external head there is a small furrow into which a plastic hat is inserted and clamped;
- Connecting. They have an elongated shape, the internal thread is solid, used to connect long parts, studs, rods.
Production material
They are made of galvanized steel cold -rolled or hot-rolled. They differ in strength class, this parameter shows the maximum load on the nut. If the balance between threaded joints and nuts is broken, then as the nut is tightened, the thread is destroyed, the strength of the elements is lost and the connection is no longer able to withstand maximum loads.
Some M8 nuts are made of carbon alloy steel. The strength class of such products is 12.0, they are used in heavy engineering and energy, where there are more stringent operating conditions for the connecting elements.