S-91525A326 0.344" ID x 0.75" OD Oversized Washers

Oversized Washers

1248FA00383 Oversized Washers
1248FA00383 Oversized Washers

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

Part No.
Part No. 1248FA00383
Equivalent to mcmaster :
91525A326

Basic Information

System of Measurement Inch
Washer Type Flat

Dimension Parameters

ID 0.344"
OD 0.75"
Thickness 0.110-0.140"

Material & Strength Parameters

Material 316 Stainless Steel
Hardness Rockwell B68

Installation & Application Parameters

For Screw Size 5/16"

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 due to 316 stainless steel composition, ideal for marine, chemical, and outdoor applications.
  • Enhanced load distribution with precise 0.344" ID and 0.75" OD, reducing surface pressure and preventing fastener loosening.
  • Consistent mechanical strength from Rockwell B68 hardness, ensuring reliable performance under stress without deformation.
  • Broad compatibility with 5/16" screws in inch-based systems, facilitating easy integration into existing assemblies.
  • Durable service life with a thickness range of 0.110-0.140", providing robust support for heavy-duty industrial use.
  • Regulatory compliance assurance with RoHS 3 and REACH standards, meeting strict environmental and safety requirements.
  • Accurate dimensional fit for seamless installation, minimizing assembly time and improving operational efficiency.

Professional Applications & Engineering Value

These 316 stainless steel flat washers are engineered to address common industrial challenges such as galvanic corrosion, mechanical wear, and regulatory non-compliance. The high molybdenum content in 316 grade stainless steel offers exceptional resistance to chlorides and acidic conditions, making them suitable for marine equipment, chemical processing plants, and food machinery. With a Rockwell B68 hardness, they maintain structural integrity under vibration and load, preventing premature failure. The precise inch system dimensions (0.344" ID and 0.75" OD) ensure optimal alignment with 5/16" screws, reducing installation errors and enhancing the longevity of fastened joints in heavy-duty applications.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.344", outer diameter of 0.75", and thickness ranging from 0.110" to 0.140". It is designed for compatibility with 5/16" screw sizes and manufactured to meet consistent mechanical properties, including a Rockwell B68 hardness. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and international applications.

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