Ensure optimal fit and performance with our expertly verified 4 butterfly valve bolt size specifications, designed to meet rigorous industry standards for purchasing managers, technical directors, and operations leaders in the USA and English-speaking markets.
Selecting the correct bolt size for butterfly valves is critical yet often overlooked, leading to issues such as:
For example, a recent survey of industrial operations in North America showed that 37% of valve failures were linked to improper bolt sizing, emphasizing the need for precise specifications and quality control.
Your next step: Discover how Thriveon Valve ensures your bolt size accuracy and quality.
At Ningjin Thriveon Valve Co., Ltd., we understand your need for precise bolt sizing in butterfly valves and offer:
| Valve Size (inch) | Bolt Diameter (mm) | Bolt Length (mm) | Bolt Quantity | Bolt Grade |
|---|---|---|---|---|
| 4" | 16 | 50 | 8 | Grade 8.8 |
| 4" | 18 | 55 | 8 | Grade 10.9 |
Next action: See why global clients trust Thriveon Valve.
Typically, the 4 butterfly valve bolt size is M16 with a length of 50-55 mm, quantity 8 bolts, following ANSI and ISO standards.
Yes, Ningjin Thriveon offers OEM/ODM services to tailor bolt sizes according to your specific project and regulatory requirements.
Standard orders are shipped within 15-25 business days, with expedited options available depending on quantity and customization.
We accept T/T, L/C, PayPal, and Western Union for international clients, ensuring secure and flexible transactions.

Yes, our experienced engineers offer comprehensive after-sales support including installation guidance and maintenance advice.
Ready to clarify more? Contact us now for expert assistance.
Benefit from risk-free purchasing with free samples and a 30-day money-back guarantee. Don’t miss out on high-quality bolt sizes that enhance valve reliability.
James L., Operations Manager, Texas
"Thriveon Valve’s precise bolt sizing eliminated installation errors and improved our plant’s efficiency by 25%. Their fast delivery and responsive support impressed our team."
Maria S., Technical Director, California
"We rely on Thriveon’s OEM services to customize bolt sizes that perfectly fit our specialized butterfly valves — unmatched quality at competitive prices."
Ahmed K., Supply Chain Manager, Saudi Arabia
"Their international certifications and strict quality controls give us confidence in every shipment. Thriveon Valve is our trusted supplier for all valve components."
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Call us on:
+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China
Trusted by Leading Companies Worldwide
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Your next step: Find answers to common questions about 4 butterfly valve bolt size.