Fasteners come in every imaginable shape, size, and finish, and each type serves a unique purpose across various applications. If you're new to the world of specialty fasteners, don't worry—here’s a collection of frequently asked questions by buyers to help guide you.
---
### 1. What’s the Difference Between a Bolt and a Screw?
This is a common query since the terms are often confused. Generally speaking, bolts are designed to work with a nut to join two parts together, whereas screws are meant to be screwed into a pre-tapped hole. While a screw can sometimes function as a bolt with a nut, a bolt isn’t always interchangeable with a screw. This distinction comes down to their intended use and manufacturing specifications.
---
### 2. What Are the Most Common Fastener Materials and Finishes?
Fasteners are typically made from materials like steel, stainless steel, or aluminum, each offering different strengths and resistance to corrosion. You’ll also find various finishes, such as zinc plating, hot-dip galvanizing, and PTFE coatings, which add extra layers of protection against environmental wear.
---
### 3. What’s the Difference Between Coarse and Fine Threads?
Understanding thread types is key, as it impacts the fastener’s performance, assembly ease, and resistance to loosening. Coarse threads (UNC) have fewer threads per inch compared to fine threads (UNF), making them ideal for quick assembly jobs in construction due to their durability and compatibility with thicker coatings. Fine threads, on the other hand, excel in applications requiring strength and vibration resistance, like automotive and machinery.
---
### 4. What Are the Different Types of Mechanical Anchors and When Should I Use Them?
Mechanical anchors are essential for securing materials to concrete or masonry. There are several types, including wedge anchors, sleeve anchors, masonry screws, screw bolts, drop-in anchors, and Sammy’s®. Each type serves specific purposes, so knowing their differences is critical for proper selection. For instance, drop-in anchors require a special tool for installation.
---
### 5. Why Do Grade Markings Matter on Fasteners?
Grade markings indicate the tensile strength of the fastener. For example, SAE Grade 5 fasteners feature three radial lines on the head, while Grade 8 fasteners have six. Metric fasteners use property classes like 8.8, 10.9, and 12.9, directly representing tensile strength in megapascals (MPa).
---
### 6. Which Nut Should I Pair With a Particular Bolt?
Selecting the right nut for your bolt is vital for a secure connection. Compatibility is key—certain nut grades are specifically designed for corresponding bolt grades. For instance, ASTM A193 Grade B7 studs should always be matched with A194 Grade 2H heavy hex nuts.
---
### 7. How Do I Measure the Correct Length of an All-Thread Stud?
There are two methods for measuring all-thread studs: overall length and first thread to first thread. Continuous thread studs are measured from end to end, including the chamfer, while flange-type studs are measured from the first fully formed thread to the next to last fully formed thread, excluding the chamfer.
---
### 8. What Are Rivnuts, and How Are They Used?
Rivnuts, also called rivet nuts, are threaded inserts used in thin materials to create a robust threaded connection. They’re perfect for situations where access is limited to one side of the material, such as in truck trailer paneling.
---
### 9. What Is a Structural Bolt?
Structural bolts are heavy hex bolts with a full body diameter and shorter thread lengths than standard hex bolts, making them ideal for load-bearing applications.
---
### 10. What Is an Anchor Bolt?
Anchor bolts are used to secure steel structures to concrete. One end is embedded in the concrete, while the threaded part remains exposed. Common anchor bolt grades include 35, 55, and 105.
---
### Big Bolt Has Big Inventory
Are you working on a project and unsure about the type or quality of fasteners needed? Big Bolt has got you covered! We can either manufacture custom fasteners or provide from our extensive stock. Need something rushed or customized? No problem—we’re here to help ensure your project succeeds. Reach out today for a quote!
---
As you dive deeper into the world of fasteners, remember that the right choice depends heavily on your application needs. Whether you’re working on a small repair or a large-scale project, having the right tools at your disposal makes all the difference. Contact Big Bolt today, and let us help you get started!
Emergency LED bulkhead lights with IP65 rating are durable and suitable for outdoor use. The monthly auto-self test function ensures that the lights are always in working order. These lights are designed for ceiling mounted installation, making them ideal for use in corridors, stairwells, and other areas where emergency lighting may be needed. The built-in 7.4V LiFePO4 battery provides reliable backup power in the event of a power outage. These lights are a practical and reliable solution for emergency lighting needs.
Emergency Bulkhead,Emergency Bulkhead Light,Led Emergency Bulkhead,Led Bulkhead Emergency Light
JIALINGHANG ELECTRONIC CO.,LTD. , https://www.jlhemergencylighting.com