Self-locking fasteners are standard screws and bolts that have a special coating applied to them which allows them to stay fastened over long durations of time. Self-locking fasteners are resistant to loosening from vibration and motion, making them ideal for a variety of situations that would otherwise require permanent fasteners.

Self-locking fasteners come in standard and metric measurements. Some manufacturers will custom create fasteners to exact specifications when your business has a specific need that can't be met by standard fasteners. One downfall to purchasing fasteners in bulk online is the shipping cost. When purchasing fasteners from a local manufacturer or supplier is not an option, consider the following:

1. Locate self-locking fastener manufacturers

2. Purchase fasteners from a distributor

3. Purchase specialty pieces and metric self-locking fasteners

Action Steps
The best contacts and resources to help you get it done

Purchase directly from self-locking fastener manufacturers

When you are purchasing self-locking fasteners in large quantities, you will want to purchase directly from the manufacturer in order to get the best deal. Whether you are intending to resell the product or are using them for your business, working directly with the manufacturer is the way to go.

I recommend: Nylok is a manufacturer that produces self-locking fasteners with the NYLOK BLUE PATCH™ self-locking element. The NYLOK BLUE PATCH is permanently bonded onto the fastener threads, allowing the metal to metal contact to resist vibrations and loosening. Longlok is another producer of self-locking fasteners, as well as self-sealing fasteners.

Locate self-locking fastener distributors

When your business requires self-locking fasteners in low volume, work with a fastener distributor. Working with a distributor allows you to purchase all of your hardware needs in one place, saving you both time and money.

I recommend: American Fastener distributes self-locking fasteners world wide. Their line of fasteners includes self-locking screws and nuts. MSC is a self-locking fastener distributor that carries a full line of self-locking fasteners. They also sell Vibra-Tite which is a powder that allows you to turn any fastener into self-locking. MSC offers an express check out option for frequent customers.

Purchase specialty screws from self-locking fastener suppliers

Metric fasteners are not sold by all retailers. Purchase metric fasteners from a retailer that deals with specialty parts. When standard fasteners will not be sufficient for your fastener needs, work with a manufacturer that can custom make the type of fastener you need.

I recommend: Global Fastener & Supply is a distributor that carries a line of self-locking metric fasteners. National Nut & Bolt is a nut and bolt manufacturer and distributor. NN&B has been in business for many years. They will custom make self-locking fasteners in metric or standard measurements.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Use both self-locking screws and nuts for increased protection against loosening if your joint is mission critical.