DIN 127-a

DIN 127-A is a standard specification for spring lock washers that was developed by the German Institute for Standardization (DIN) in Germany. The specification defines the dimensions and tolerances of spring lock washers that are used to prevent the loosening or slipping of a nut or bolt due to vibration or other forces.

The "A" in DIN 127-A indicates that this standard applies to washers with a normal thickness, as opposed to thicker "B" or thinner "C" versions. The standard specifies the material, finish, dimensions, and other properties of the washer, such as its inner and outer diameter, thickness, and the angle and depth of the teeth that grip the surface of the bolt or nut.

DIN 127-A washers are commonly used in automotive, aerospace, and industrial applications where secure fastening is critical. The standard has been widely adopted in many countries and is often referenced by manufacturers and suppliers of fasteners and related products.

Uses of DIN 127-A

• DIN 127-A is a standard specification for spring lock washers developed by the German Institute for Standardization (DIN).
• Spring lock washers are used to prevent bolts and nuts from loosening due to vibration or other external forces.
• The "A" in DIN 127-A indicates that this standard applies to washers with a normal thickness.
• The standard specifies the material, finish, dimensions, and other properties of the washer, such as its inner and outer diameter, thickness, and the angle and depth of the teeth that grip the surface of the bolt or nut.
• DIN 127-A washers are widely used in automotive, aerospace, machinery, construction, and many other industries.
• These washers are often used in conjunction with other fasteners, such as bolts or screws, to provide a secure and reliable connection.
• The spring action of the washer provides a constant tension that keeps the fastener securely in place, even when subjected to strong vibrations or shocks.
• Overall, DIN 127-A spring lock washers are an important component of many mechanical systems, providing an extra layer of security and reliability.

Materials for DIN 127-A

Materials specified by ANSI and ASME standards:

• Carbon steel: This is the most commonly used material for DIN 127-A washers made to ANSI and ASME standards. Carbon steel washers are typically made from grades 1010 through 1050, with 1050 being the most common.
• Alloy steel: Alloy steel washers are also specified by ANSI and ASME standards, and are typically made from grades such as 4130, 4140, and 4340.

Materials specified by ASTM standards:

• Stainless steel: Several grades of stainless steel are specified by ASTM standards for use in DIN 127-A washers. These include 18-8 stainless steel (grade 304), 316 stainless steel (grade 316), and 410 stainless steel (grade 410).
• Carbon steel: ASTM standards specify several grades of carbon steel that can be used to make DIN 127-A washers, including A36, A572, and A588.
• Alloy steel: ASTM standards also specify several grades of alloy steel that are suitable for use in DIN 127-A washers, including A193 grade B7 and A194 grade 2H.Materials specified by DIN standards:
• Spring steel: DIN standards specify several grades of spring steel that can be used to make DIN 127-A washers, including CK67 and 51CrV4.
• Stainless steel: Several grades of stainless steel are also specified by DIN standards for use in DIN 127-A washers, including X5CrNi18-10 (material number 1.4301) and X2CrNiMo17-12-2 (material number 1.4404).
• Brass: DIN standards specify several grades of brass that can be used to make DIN 127-A washers, including CuZn39Pb2 (material number CW614N) and CuZn36 (material number CW509L).