Fastener Guides | Fastener SuperStore | Bulk Industrial Fasteners

Measuring Screws / Bolts

Knowing how to find the diameter and length of the fasteners you need is an important first step in acquiring the correct parts.

A wide variety of screw styles have been developed over the years. The defining element of most of these styles can be found in the shaft, or body, of the screw. Different thread layouts and unique tip shapes are required for different applications.

Screws - Head Styles

Every screw and bolt has a head that is unique to its intended function. This is your basic guide to head styles and their uses.

Screws - Drive Styles

Every screw and bolt requires a tool to turn, drive and install it. This is your basic guide to drive styles and their uses.

Screws - Tapping vs. Drilling

The term "self-tapping screws" generally refers to a type of screw that is self starting when driven into material, whether it be wood, metal or plastic. It taps its own hole.

Bolts - Bolt Grades & Head Markings

Many of our bolt styles are available in various grade and class options with each grade containing distinctive head markings. The following markings are the primary indicators used on our parts.

Bolts - Bolt Types

Bolts come in a large variety of head and thread styles. Use our bolt guide below to help identify the parts you need.

Stainless Steel

Fastener SuperStore carries a wide range of 300 Series & 400 Series Stainless Steel products. The primary differences between the two involve corrosion resistance vs. hardness.

Pilot Hole & Drill Bit Sizing by Screw Type

Self-drilling screws can drill their own pilot hole, but other types need help getting started.

Nuts Guide

Nuts are among the most expansive categories of hardware. Use our nut guide below to help identify the parts you need.

Washer Types

Fastener SuperStore's comprehensive washer guide will help you find the right type for your application.

All About Thread Cutting Screws

Sharp Cutting Tip Creates Mating Threads in Unthreaded Material. Available in Type F, Type 1, Type 23, Type 25.

All About Thread Forming Screws

Generic Alternatives to PLASTITE® & TAPTITE® Brand Thread Forming Screws, also High Low Style.

All About Wood Screws

Wood screws are the right choice when your application involves building or constructing projects where wood is mated or attached to other wood surfaces.