DIN 980M Locking Nuts

Leader-Fastener® DIN 980 Locking Nuts, all metal lock nut is also known as all metal self-locking nut. There are two main locking forms:

a. This kind of nut is called 980-v type, and the common forms are as follows: end face three-point type, elliptical type, side extrusion type.

b. The nut is embedded with a metal locking plate, which can prevent loosing by the locking ring. This kind of nut is called 980-m

The locking principle of 980-m nut is as follows: the nut is embedded with a metal sheet after heat treatment, the inner diameter of the metal sheet is slightly smaller than the outer diameter of the bolt thread. After the nut is tightened, the metal sheet will block the bolt thread, which can effectively play the role of anti loose and anti-seismic.

The locking nut can be used repeatedly, but it is not recommended to disassemble and install repeatedly. After many times of disassembly and installation, the locking torque of the nut will decrease significantly (the fifth disassembly is significantly lower than the first disassembly).

The mechanical performance requirements of all metal lock nuts are the same as those of ordinary nuts. The common grades of carbon steel are generally grade 8, grade 10 and grade 12, while those of stainless steel are generally grade 70 and Grade 80.

Among them, the carbon steel nut’s load retention and hardness requirements shall refer to the standard of ordinary carbon steel nut, which can refer to the standard ISO 898-1 (mechanical property requirements of carbon steel nut) for acceptance. Stainless steel nuts only refer to carbon steel nuts for load holding performance, and hardness is not required.

To ensure the locking performance, the locking nut shall refer to the torque requirements for five times of screwing in and out specified in ISO 2320 (mechanical performance requirements for pre torque locking nuts). Ordinary nuts do not have this special requirement.

Product Specification of Leader-Fastener® DIN 980M Locking Nuts

Material : Carbon steel, Stainless steel, Alloy Steel, Brass.

Finishment: Black, Zinc Plated, Zinc Yellow, HDG, Phosphate, DACROMET, Geomet, Magin, Ruspert, Teflon, etc.

DIN 980 (M) - 1987 Prevailing Torque Type Hexagon Nuts with Two-piece Metal (Type M)

①,Type V:

Single-piece metal nuts are nuts without an insert, in which increased friction is created by the appropriate deformation of the prevailing torque element of the nut.

Type M:

Two-piece metal nuts are nuts, in which increased friction is created by an additional metal element inserted in the prevailing torque element of the nut. This type dose not have full loadability.

②,Material:

Steel, Strength class (material): 5,8,10,12(≤M16)。Standard DIN 267-4