Round Low-Profile Head
The smooth domed head provides a clean appearance and reduces external protrusion, making it suitable for applications where exposed fasteners require a neat finish.
ASME/ANSI B 18.5-2 Round Head Square Neck Bolts (Inch Series)
- Standard: ASME/ANSI B 18.5-2
- Material: Stainless Steel
- Thread Size: 1/4 – (1-3/8)
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
ASME B18.5-2 Round Head Square Neck Bolts (Inch Series) are inch-series carriage-style bolts featuring a round head and square neck under the head. The square neck prevents the bolt from rotating during tightening, allowing installation from one side without holding the bolt head. This standard defines dimensional requirements for round head square neck bolts used in general industrial applications.
These bolts are commonly manufactured in materials such as carbon steel, alloy steel, and stainless steel, with mechanical properties and finishes specified according to applicable ASTM, SAE, IFI, and ASME standards.
Draw
Specification
ASME B18.5-2 vs Standard Carriage Bolts
Standard Compatibility
ASME B18.5-2 defines the dimensional requirements for inch-series round head square neck bolts, ensuring consistency in head size, neck design, and thread compatibility. Standard carriage bolts may follow other specifications depending on region and application.
Application Focus
ASME B18.5-2 bolts are typically selected for engineered applications requiring controlled dimensions, while general carriage bolts are often used for common commercial fastening purposes.
Manufacturing Control
ASME B18.5-2 products provide standardized dimensions suitable for industrial sourcing, OEM production, and replacement applications.
Product Advantages
Square Neck Locking Design
The square neck grips the mating hole and prevents bolt rotation during installation, improving tightening efficiency and reducing the need for additional tools.
Inch Series Standard Dimensions
Manufactured according to ASME B18.5 dimensional requirements, covering head diameter, neck dimensions, thread specifications, and bolt lengths for inch-size applications.
Common Questions
What is ASME B18.5-2 Round Head Square Neck Bolt?
It is an inch-series bolt with a rounded head and square neck designed to prevent rotation during tightening. It is part of the ASME B18.5 round head bolt family.
What is the purpose of the square neck?
The square neck locks into a square hole or formed material surface, preventing the bolt from spinning while the nut is tightened.
Where are these bolts commonly used?
They are frequently used in industrial equipment, agricultural machinery, construction applications, and assemblies requiring a tamper-resistant smooth head design.
Can ASME B18.5-2 Lobed Head Screw be customized?
Yes. Manufacturers can provide customized materials, coatings, lengths, thread specifications, and packaging according to project requirements.
