Star Washer Supplier in Ahmedabad

About Star Washers

A star washer has teeth that bite into the nut and the surface. This stops the joint from loosening and makes good electrical contact. External tooth washers give the most grip, while internal tooth washers suit small heads. The common standards are DIN 6797 and DIN 6798.

Applications

• Electrical earthing and panel connections
• Electronics and appliances
• Automobile wiring and lighting
• Light machinery and covers

Star Washer Size Chart

Key dimensions of external tooth star washers to DIN 6797 (form A) and DIN 6798 (form A) in common sizes, in mm. Both standards use the same inner diameter, outer diameter and thickness for these sizes.

Typical dimensions as per DIN 6797 and DIN 6798; refer to the standard for tolerances.

Star Washer FAQs

Why are star washers used for earthing?

The sharp teeth cut through paint and oxide layers and give a reliable metal-to-metal contact for the earth connection.

What is the difference between DIN 6797 and DIN 6798 star washers?

DIN 6797 washers have fewer, broader teeth, while DIN 6798 washers have more, finer serrations. Both come with external or internal teeth and share the same main sizes, so either fits the same bolt.

Which stainless steel grade should I choose for star washers?

SS 304 suits most panels and outdoor work. Choose SS 316 near the sea or in chemical plants, and SS 202 for dry, indoor panels. Use the same grade as the bolt and nut. Our SS 304 vs SS 316 vs SS 202 guide compares the grades.