S-91080A105 Easy-Install Slotted Washers

Easy-Install Slotted Washers

1291FA00030 Easy-Install Slotted Washers
1291FA00030 Easy-Install Slotted Washers

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

Part No.
Part No. 1291FA00030
Equivalent to mcmaster :
91080A105

Basic Information

System of Measurement Inch
Washer Type Slotted

Dimension Parameters

OD 0.75"
Thickness 0.056-0.071"

Material & Strength Parameters

Material 18-8 Stainless Steel
Hardness Rockwell B68

Installation & Application Parameters

For Screw Size 1/4"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/14/2023, 235 SVHC) Compliant

Geometric Parameters

Slot Width 9/32"
Slot Depth 1/2"
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 with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
  • Enhanced load distribution from the 0.75" outer diameter, reducing surface pressure and preventing material damage.
  • Secure fastening compatibility designed for 1/4" screws with precise slot dimensions (9/32" width, 1/2" depth) for easy tool engagement.
  • Exceptional mechanical strength thanks to Rockwell B68 hardness, ensuring the washer maintains shape under high stress.
  • Reliable dimensional consistency in the inch measurement system, facilitating seamless integration with standard components.
  • Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for regulated industrial sectors.
  • Durable performance in demanding applications due to the balanced thickness range (0.056-0.071"), offering stability without adding excess weight.

Professional Applications & Engineering Value

This slotted washer in 18-8 stainless steel addresses common industrial challenges like corrosion-induced failure and assembly inefficiency. The inch system design, with precise slot width and depth, ensures quick installation using standard tools, reducing labor time in machinery, automotive, and construction settings. Its Rockwell B68 hardness provides consistent performance under vibrational loads, while the corrosion-resistant material eliminates the need for frequent replacements in humid or chemical-exposed environments. Engineers value this washer for maintaining fastening integrity in heavy-duty applications, supported by compliance with global standards for safe, sustainable use.

Specification Summary & Compliance

This washer adheres to standard inch measurements with an OD of 0.75", thickness range of 0.056-0.071", and slot dimensions of 9/32" width by 1/2" depth, compatible with 1/4" screws. It meets industry specifications for dimensional accuracy and is manufactured from 18-8 stainless steel with a hardness of Rockwell B68. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it aligns with environmental and health safety regulations for industrial components.

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