S-98690A121 25 mm ID x 39 mm OD DIN 433 General Purpose Washers

General Purpose Washers

1247FA00388 General Purpose Washers
1247FA00388 General Purpose Washers

Image may differ from product. See technical specification for details.

Part No.
Part No. 1247FA00388
Equivalent to mcmaster :
98690A121

Basic Information

System of Measurement Metric
Washer Type Flat
Specifications Met DIN 433

Dimension Parameters

ID 25 mm
OD 39 mm
Thickness 3.7-4.3 mm

Material & Strength Parameters

Material 316 Stainless Steel
Hardness Rockwell B75

Installation & Application Parameters

For Screw Size M24

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/14/2023, 235 SVHC) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction
  • Enhanced load distribution and surface protection with a precise 25mm ID and 39mm OD
  • Exceptional mechanical strength and durability provided by Rockwell B75 hardness
  • Guaranteed dimensional accuracy and interchangeability ensured by DIN 433 standard compliance
  • Reliable performance for M24 screws, ensuring secure and stable fastening in demanding applications
  • Long-term operational safety with full compliance to RoHS 3 and REACH environmental regulations
  • Consistent thickness (3.7-4.3 mm) for uniform pressure distribution and reduced risk of fastener loosening

Professional Applications & Engineering Value

This M24 flat washer is engineered from 316 stainless steel, offering exceptional resistance to chlorides and acidic conditions, making it ideal for chemical processing, marine, and offshore applications. The metric sizing and DIN 433 compliance ensure precise fit and reliable performance in heavy-duty machinery and structural assemblies. Its robust Rockwell B75 hardness prevents deformation under high loads, while the flat design effectively distributes pressure, preventing surface damage and bolt loosening. This washer solves critical issues like corrosion-induced failure and uneven load distribution, providing long-term reliability in industrial washers applications where safety and durability are paramount.

Specification Summary & Compliance

This flat washer meets DIN 433 specifications for dimensional accuracy, with an Inner Diameter of 25 mm, Outer Diameter of 39 mm, and Thickness ranging from 3.7 to 4.3 mm. It is designed for M24 screw size and manufactured from 316 Stainless Steel with a hardness of Rockwell B75. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.

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