DIN 127 spring washers are still requested in many metric fastener RFQs. Buyers often call them split lock washers, spring lock washers, or helical spring washers. The part looks simple, but the order details matter.

A wrong material, finish, size, or form can create assembly trouble, especially when the washer is used with bolts, nuts, or coated hardware in machinery and steel fabrication.

What DIN 127 Defines

DIN 127 covers single-coil spring lock washers for metric fastener assemblies. Common forms include Type A with tang ends and Type B with square ends. Type B is widely requested in general industrial purchasing.

Buyers sourcing washers should confirm the exact DIN 127 form, size, material, and finish before comparing prices.

Where DIN 127 Spring Washers Are Used

Common Applications

DIN 127 spring washers are often used in:

• General machinery
• Equipment repair
• Light steel structures
• Electrical cabinets
• Agricultural equipment
• Maintenance hardware kits
• Distributor stock programs

They are usually paired with metric bolts, screws, and nuts from standard fasteners.

Where Buyers Should Be Careful

Do not treat DIN 127 as a universal anti-loosening solution. In heavy vibration, dynamic load, rotating equipment, or safety-critical joints, engineers may prefer prevailing torque nuts, wedge-lock washers, thread locking patches, or controlled preload design.

The washer can help in many practical assemblies, but it should not replace proper joint engineering.

Material and Finish Selection

Spring Steel

Spring steel is common for carbon steel bolt assemblies. It offers the spring behavior expected from this washer type. Zinc plating, black oxide, and phosphate are common finishes.

Stainless Steel

Stainless steel DIN 127 washers are used where corrosion resistance matters. A2 and A4 materials are common in outdoor, light chemical, marine-adjacent, or clean equipment environments.

For finish choices, buyers can review coated fasteners and confirm whether the washer finish must match the bolt and nut.

Buying Tips for RFQs

Before placing an order, confirm:

1. DIN 127 Type A or Type B.
2. Metric size and quantity by each size.
3. Material, such as spring steel, A2, or A4 stainless.
4. Surface finish and color.
5. Packing method and label requirements.
6. Certificate or inspection report needs.
7. Whether an alternative standard is acceptable.

For metric standard comparison, this DIN and ISO fastener standards guide can help buyers avoid unclear substitutions.

Final Advice

DIN 127 spring washers are useful when specified correctly. The safest RFQ is short but complete: standard, type, size, material, finish, quantity, packing, and documents.

Buyers can contact XZ Fastener with a washer list, bolt and nut match, finish requirement, and inspection needs for a clearer quotation.