Precision Hex Head Design
Manufactured according to ASME B18.2.1 Table 6 dimensional requirements, ensuring accurate head width, height, and wrenching performance.
ASME/ANSI B 18.2.1-6 Hex Cap Screws
- Standard: ASME/ANSI B 18.2.1-6
- Material: Stainless Steel
- Thread Size: 1/4 – 3
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
ASME B18.2.1-6 Hex Cap Screws (Table 6) specifies the dimensional requirements for inch series hex cap screws with hexagonal heads. These fasteners feature tighter dimensional tolerances than standard hex bolts, providing better bearing surface accuracy and reliable wrench engagement for precision fastening applications.
Hex Cap Screws are commonly manufactured in carbon steel, alloy steel, and stainless steel, with sizes ranging from 1/4″ to 3″ nominal diameters and available in UNC, UNF, and other inch thread series.
Draw
Specification
ASME B18.2.1-6 Hex Cap Screws vs ASME B18.2.1-2 Hex Bolts
Head Accuracy
Hex Cap Screws feature tighter head dimensional tolerances, ensuring better fit with wrenches and sockets. Hex bolts generally allow wider dimensional variations.
Bearing Surface
Hex Cap Screws have a more precisely machined bearing surface under the head, providing improved load distribution and stable clamping performance.
Application
Hex Cap Screws are preferred for machinery, equipment assembly, and precision applications, while standard hex bolts are commonly used for general structural fastening.
Product Advantages
Tight Dimensional Tolerances
Compared with standard hex bolts, hex cap screws provide closer control of head dimensions and body diameter, making them suitable for applications requiring higher assembly accuracy.
Wide Material Options
Available in carbon steel, alloy steel, and stainless steel (such as 304/316) with various finishes for different strength and corrosion resistance requirements.
Common Questions
What is ASME B18.2.1-6?
ASME B18.2.1-6 refers to Table 6 of the ASME B18.2.1 standard, covering dimensional specifications for inch-series hex cap screws.
Are Hex Cap Screws the same as Hex Bolts?
No. Hex cap screws have stricter dimensional control and are designed for applications requiring higher precision.
What is the difference between UNC and UNF threads?
UNC provides coarse threads for general fastening, while UNF uses finer threads for applications requiring higher clamping accuracy.
Can ASME B18.2.1-6 Hex Cap Screws be customized?
Yes. Customized materials, finishes, packaging, and OEM specifications can be provided according to customer requirements.
