Standardized Inch-Series Dimensions
ASME B18.22.1-1A provides preferred washer dimensions matched with common inch fastener sizes, allowing easy selection and interchangeability in North American fastening systems.
ASME/ANSI B18.22.1-1A Preferred Sizes of Type A Plain Washers
- Standard: ASME/ANSI 18.22.1-1A(Table 1A)
- Material: Stainless Steel, Carbon Steel
- Thread Size: 1/4 – 3/4
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
ASME B18.22.1-1A Preferred Sizes of Type A Plain Washers specifies the preferred dimensional series for general-purpose flat washers used with inch-series bolts, screws, and nuts. The standard defines the washer dimensions based on inside diameter (ID), outside diameter (OD), and thickness, ensuring compatibility with common fastener sizes and providing reliable load distribution.
Type A plain washers are widely used in industrial fastening applications where a simple, durable washer is required to prevent surface damage, distribute clamping loads, and improve joint reliability
Draw
Specification
Type A Plain Washers vs Type B Plain Washers
- General Design
- Type A is a standard general-purpose plain washer designed for common inch-series fastening applications.
- Type B provides multiple washer series to accommodate different space and load-distribution requirements.
- Size Selection
- Type A follows preferred standard dimensions for common fastener sizes.
- Type B is available in Narrow, Regular, and Wide series, offering greater flexibility in outside diameter.
- Load Distribution
- Type A provides reliable load distribution for normal fastening applications.
- Type B can provide a larger bearing surface, particularly in the Wide series, for applications requiring greater load spreading.
- Best Application
- Type A is a practical choice for general machinery, equipment, and OEM assembly.
- Type B is better suited to applications where space limitations or specific bearing-area requirements need to be considered.
Product Advantages
Type A General-Purpose Design
Type A washers are designed for general mechanical applications, providing a balanced combination of outside diameter, thickness, and load distribution capability.
Wide Size Range Availability
Preferred sizes cover common screw and bolt sizes from small-diameter fasteners to large structural fastening applications, with additional selected sizes available when required.
Common Questions
What is ASME B18.22.1 Type A Plain Washer?
ASME B18.22.1 Type A Plain Washer is a standardized flat washer designed for general-purpose fastening applications with inch-series screws and bolts.
How are ASME B18.22.1 washers specified?
Washers are normally specified by inside diameter, outside diameter, and thickness, rather than only by nominal size.
Can ASME/ANSI B 18.22.1-1A washer be customized?
Yes. OEM customization is available for dimensions, materials, finishes, packaging, and special requirements.
What is the difference between ASME B18.22.1 and ASTM F436 washers?
ASME B18.22.1 covers general-purpose plain washers, while ASTM F436 covers hardened steel washers designed for high-strength bolted connections.
