Standardized Inch Dimensions
Manufactured according to ASME B18.2.1 dimensional requirements, ensuring consistent head size, thread geometry, and interchangeability with standard inch fastening systems.
ASME/ANSI B 18.2.1-2 Hex Bolts
- Standard: ASME/ANSI B 18.2.1-2
- Material: Stainless Steel
- Thread Size: 1/4 – 4
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
ASME B18.2.1-2 Hex Bolts are inch-series hexagon head bolts manufactured according to the dimensional requirements of the ASME B18.2.1 standard. They feature a six-sided head design for wrench tightening and are widely used in machinery, construction, automotive, industrial equipment, and general fastening applications.
ASME B18.2.1 covers dimensional specifications for hex bolts, including thread diameter, head dimensions, across-flat dimensions, corner dimensions, and bolt length requirements. Common materials include carbon steel, alloy steel, and stainless steel with various strength grades and surface treatments available.
Draw
Specification
ASME B18.2.1-2 Hex Bolts vs ASME B18.2.1-3 Heavy Hex Bolts
Head Design
ASME B18.2.1-2 Hex Bolts have a standard hex head design, while ASME B18.2.1-3 Heavy Hex Bolts feature a larger and thicker head for higher strength and increased bearing area.
Strength Capacity
Heavy Hex Bolts provide better load distribution and higher resistance to shear and tension forces, making them suitable for heavy-duty applications compared with standard Hex Bolts.
Application
Standard Hex Bolts are commonly used in general machinery and equipment assembly, while Heavy Hex Bolts are preferred for structural steel, bridges, and high-load connections.
Wrench Size
Heavy Hex Bolts require larger wrench sizes due to their oversized head dimensions, while standard Hex Bolts use conventional tooling for easier installation.
Product Advantages
Durable Hex Head Design
The six-point hexagonal head provides reliable wrench engagement, allowing efficient installation and high tightening torque for industrial applications.
Multiple Material Options
Available in carbon steel, alloy steel, and stainless steel grades with options such as zinc plating, hot-dip galvanizing, and other protective finishes for different environments.
Common Questions
What is ASME B18.2.1-2 Hex Bolt?
ASME B18.2.1-2 Hex Bolt is an inch-series hex head bolt standard that defines the dimensional requirements of hex bolts and related fasteners, including head size, thread length, and bolt geometry.
What is the difference between ASME B18.2.1 and ASME B18.2.6?
ASME B18.2.1 mainly covers general hex bolts and screws in inch dimensions, while heavy hex structural bolts previously included in B18.2.1 have been moved to ASME B18.2.6.
What thread types are available?
ASME B18.2.1-2 Hex Bolts commonly use inch thread systems such as UNC (Unified Coarse Thread) and UNF (Unified Fine Thread) depending on application requirements.
Can ASME B18.2.1-2 Hex Bolts be customized?
Yes. Customized materials, finishes, packaging, and OEM specifications can be provided according to customer requirements.
