Bolt Dimensions Explained: A Complete Guide to Measuring Diameter, Threads, and Length
How Do You Measure Bolt Diameter Accurately?
The Three Critical Diameter Measurements
The Technician’s Measurement Checklist
Which Tools Are Best for Measuring Bolt Diameter?
1. Digital Calipers
2. Micrometers
3. Optical Comparators & CMMs
4. Bolt Gauges / Thread Detective
What Is Bolt Thread Pitch and How Is It Measured?
Metric vs. Imperial: Two Different Languages
How to Use a Thread Pitch Gauge
Reference Table: Common Thread Standards
How Is Bolt Length Measured? (It’s Not Always End-to-End)
1. Hex Bolts, Flange Bolts, and Socket Head Cap Screws
2. Flat Head / Countersunk Bolts
3. Stud Bolts (for Flanges)
Metric vs. Imperial: The Conversion Headache
When to Convert and When to Replace
Why Bolt Dimensions Are Critical for Flange Assemblies
The Aluminum Flange Factor
ASME B16.5 Standards
Summary: How to Ensure You Order the Right Fasteners
Need Help with Flange Fasteners?
Key Takeaways for the Technician