S-91844A420 0.33" ID x 1" OD Curved Washers

Curved Washers

1301FA00008 Curved Washers
1301FA00008 Curved Washers

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

Part No.
Part No. 1301FA00008
Equivalent to mcmaster :
91844A420

Basic Information

System of Measurement Inch
Washer Type Curved

Dimension Parameters

ID 0.33"
OD 1"
Thickness 0.050-0.070"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell B40

Installation & Application Parameters

For Screw Size 5/16"
For Tube OD 1"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion protection through zinc-plated steel construction, extending service life in harsh industrial environments
  • Optimal spring tension and load distribution thanks to the curved design, preventing loosening under vibration and thermal cycling
  • Precise compatibility with 5/16" screw sizes and 1" tube ODs, ensuring perfect fit and reliable assembly
  • Enhanced durability with Rockwell B40 hardness, maintaining structural integrity under repeated loading
  • Consistent performance guaranteed by controlled thickness (0.050-0.070"), providing uniform compression and sealing
  • Global compliance assurance meeting RoHS 3 and REACH standards, suitable for international supply chains
  • Reduced maintenance requirements through robust material and finish, lowering total cost of ownership

Professional Applications & Engineering Value

These zinc-plated steel curved washers deliver critical engineering solutions where standard flat washers fail. The distinctive curved design acts as a spring washer, maintaining constant tension to combat vibration-induced loosening in machinery, automotive assemblies, and structural frameworks. Made from zinc-plated steel, they provide excellent corrosion resistance in humid or chemically aggressive environments, significantly extending equipment lifespan. Perfectly sized for 5/16" screw applications and 1" tube OD installations, they ensure precise fitment while the Rockwell B40 hardness guarantees consistent performance under mechanical stress. This combination of material strength and geometric design solves common fastening challenges in heavy-duty industrial applications.

Specification Summary & Compliance

This curved washer features precise inch-dimension specifications: 0.33" ID, 1" OD, and thickness range of 0.050-0.070". Manufactured from zinc-plated steel with Rockwell B40 hardness, it meets industry standards for mechanical fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use across global markets.

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