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Fastener FAQ’s

Fastener FAQ’s

Knapp Fasteners Inc.

3 min read

1. What is a fastener?
A fastener is a hardware device used to mechanically join or affix two or more objects together securely. Common types of fasteners include bolts, screws, nuts, washers, rivets, anchors, etc.

2. What is the difference between a bolt and a screw?
Bolts are typically used with nuts to join two or more unthreaded components, whereas screws are designed to be inserted directly into a threaded hole. Bolts usually have a blunt end, while screws have a pointed end for easier insertion.

3. What is the purpose of a nut?
A nut is a type of fastener that is used to secure a bolt in place. It is threaded internally to mate with the threads on the bolt, providing a strong and secure connection. Different types of nuts will be used for different applications such as a standard hex nut compared to a nylon insert lock nut.

4. How do I determine the right size of a fastener?
Fasteners are typically sized according to their diameter, thread pitch (for threaded fasteners), and length. Diameter is measured across the widest part of the fastener, thread pitch refers to the distance between threads, and length is measured from the tip to the end of the fastener.

5. What are washers used for?
Washers are flat, disk-shaped fasteners that are placed between the nut or bolt head and the surface of the material being fastened. They distribute the load evenly, prevent damage to the material surface, and help to prevent loosening over time.

6. How do I choose the right fastener material for my project?
The choice of fastener material depends on factors such as the application, environmental conditions, and desired properties such as strength, corrosion resistance, and conductivity. Common materials include steel, stainless steel, brass, aluminum, and titanium.

7. What is the difference between coarse thread and fine thread fasteners?
Coarse thread fasteners have fewer threads per inch and are used for general-purpose applications where rapid assembly is required. Fine thread fasteners have more threads per inch and provide a tighter and more secure grip, making them suitable for applications where strength and vibration resistance are important.

8. How do I prevent fasteners from loosening over time?
To prevent fasteners from loosening due to vibration or other factors, you can use locking mechanisms such as lock washers, lock nuts, thread-locking adhesives, or spring washers. Additionally, ensuring that fasteners are tightened to the appropriate torque specification can help maintain their integrity.

9. Can I reuse fasteners after they have been removed?
Reusing fasteners is generally not recommended, especially for critical applications or high-stress environments. Fasteners can become weakened or damaged during removal, which may compromise their reliability. It is usually safer to use new fasteners for optimal performance.

10. How do I properly install and tighten fasteners?
Proper installation of fasteners involves aligning components correctly, ensuring that threads are clean and undamaged, and tightening fasteners to the recommended torque specification using appropriate tools such as wrenches or torque wrenches. Over-tightening can cause damage, while under-tightening may result in inadequate clamping force.