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#3 Head Plow Bolts
The largest line-up of #3 Head Plow Bolts in the industry.

Slotted to allow
for easy cotter pin
installation

Slotted Hex Nuts

Earnest Machine stocks #3 Head Plow Bolts in sizes ranging from 3/8” to 1 3/8” in diameter and from 1″ to 8″ in length, in Grade 5, 8, and 170M strength levels, in either a Flat, Domed, or Oversized head style. 

Download the product specification sheet here >>

What's a #3 Head Plow Bolt?

Watch the video to learn more about the features and benefits of slotted hex nuts. 

Features

#3 Domed Head Plow Bolts 

The #3 Domed Head Plow Bolt is designed with an added layer of steel on top of the fastener’s head. This thicker, domed head provides a greater amount of wear resistance and reduces the likelihood of bolt and blade breakage within your fastened assembly.

Deeper Depth of Square

The #3 Domed Head Plow Bolt also features a deeper depth of square, which provides fuller engagement in square holes and helps to lock the Plow Bolt in place while the nut is tightened during installation. 

#3 Flat Head Plow Bolts

The #3 Flat Head Plow Bolt, also known as a standard Plow Bolt, features a flat head design that provides a flush mount and zero clearance within countersunk holes. This style of fastener is a great choice for applications where a low-profile head is needed. 

#3 Oversized Head Plow Bolts

This style of Plow Bolt features a larger head size than what is standard for its thread size. #3 Oversized Head Plow Bolts provide a greater amount of wear resistance and are used in applications where the blade is manufactured to accept a larger head size than the hole drilled into the moldboard of the blade.

#3 Head Plow Bolt Applications

Snow Plow Assemblies
Earthmoving Equipment
Mining & Quarry Applications
Agriculture Equipment
Department of Transportation

Email us at ukenquiry@earnestmachine.com or call +44 (0) 1902 711041

M6 - M12 Hex Flange Bolts to DIN 6921
Available with PPAP 3 certification
in a Zinc Clear Trivalent finish.

Earnest Machine’s line of 10.9 and 8.8 Metric Hex Flange Bolts are manufactured to DIN 6921 and are available with a level 3 PPAP certification. Both 10.9 and 8.8 grades are available in a Zinc Clear Trivalent finish, with diameters ranging from M6 to M12, and our line of 10.9 product has been baked to help prevent hydrogen embrittlement. 

Download the Spec Sheet

Our Spec Sheet has sizes, dimensions, product attributes, applicable sales markets, and everything else you need to know about our line of DIN 6921 Metric Hex Flange Bolts.

Find the spec sheet here >> 

Features

Level 3 PPAP Certification Held to DIN 6921

Earnest Machine’s full line of Metric Hex Flange Bolts are manufactured to a Level 3 PPAP certification per DIN 6921 to ensure high-quality parts are supplied. 

Level 3 PPAP certifications are available at a subsidized cost if required. 

To learn more about PPAP certifications and how they are used within the industry follow the link below.

Learn more here >>

Baked to Prevent Hydrogen Embrittlement

Our line of plated high-strength 10.9 DIN 6921 Metric Hex Flange Bolts are baked to prevent hydrogen embrittlement.

Baking, also known as de-embrittlement, is a process that helps remove any atomic hydrogen that may have been introduced during the initial electroplating process. This helps the fasteners retain their ductility and prevents any hydrogen embrittlement failures from occurring within your fastened assembly.

Baking also ensures that our line of product meets industry standards for plated 10.9 fasteners.

Why Use a Hex Flange Bolt?

Hex Flange Bolts feature a built-in flange that eliminates the need for a separate washer. Pair this style of fastener with a Hex Flange Nut, Nylon Insert Hex Flange Lock Nut, or an All Metal Hex Flange Lock Nut, and experience superior locking action that is vibration resistant and reduces the likelihood of a failed assembly.

How a Hex Flange Bolt Works

Thanks to the built-in flange, Hex Flange Bolts work to spread the clamping load over a wider area, creating a tighter, more secure bond between the fastened components in your assembly. Hex Flange Bolts are also the preferred choice when fastening together metal to metal components. 

Email us at ukenquiry@earnestmachine.com or call +44 (0) 1902 711041

Slotted Hex Nuts
Slotted to allow for easy cotter pin installation.

Slotted to allow
for easy cotter pin
installation

Slotted Hex Nuts

Earnest Machine stocks Slotted Hex Nuts in sizes ranging from 1/4 to 3 inches in diameter and offers Slotted Hex Nuts in a wide variety of grades and finishes to choose from. 

Download the product specification sheet here >>

What is a Slotted Hex Nut?

Watch the video to learn more about the features and benefits of slotted hex nuts. 

Features

Slotted Body

Slotted Hex Nuts feature six slotted sides to allow a cotter pin to freely pass through its body.

This style of fastener is also designed to be used with a bolt, screw, or stud that has received a hole drilled through its threads. 

Locking Action Capabilities

Once the Slotted Hex Nut has been tightened, a cotter pin is then inserted through one of the open slots on the Hex Nut, and through the drilled hole on the bolt, screw, or stud. 

This is done to lock the assembly in place and prevent the nut from spinning free or loosening within its application. 

Slotted Hex Nuts Vs. Castle Nuts

Slotted Hex Nuts are commonly confused with Castle Nuts, which feature a slotted collar that offers a smaller surface area around its six open sides. 

This smaller surface area allows for a cotter pin to be wrapped around the Castle Nut to achieve a tighter more compact assembly. 

Alternative names for this product

Slotted Hex Nuts can sometimes be referred to as:

Castle Nut
Spindle Nut
Slotted Nut

Slotted Hex Nut Applications

Heavy Truck Assemblies
Diesel Engine Assemblies 
Construction Equipment

Slotted Hex Nut Sizes & Finishes

Earnest Machine stocks Slotted Hex Nuts Bolts in sizes ranging from 1/4 to 3 inches in diameter in a wide range of grades and finishes to choose from. 

Grade 8 Slotted Hex Nuts
Grade 5 Slotted Hex Nuts
Grade 2/Carbon Steel Slotted Hex Nuts

Additional Slotted Product We Supply

Slotted Hex Jam Nuts
Thick Slotted Hex Nuts
Castle Nuts
Heavy Hex Slotted Nuts 
Heavy Hex Slotted Jam Nuts

 

Email us at ukenquiry@earnestmachine.com or call +44 (0) 1902 711041

What is a 12-Point Flange Screw?

Designed as a replacement to Hex Socket Head Cap Screws,12-Point Flange Screws offer increased durability, easy installation, reusability, and provide higher amounts of torque during installation to create a tighter, more secure assembly. 

To learn more about Earnest Machine’s line of 12-Point Flange Screws, download the spec sheet or give us a call at +44 (0) 1902 711041.

What is a Hex Jam Nut?

Hex Jam Nuts are half the thickness of standard Hex Nuts and are commonly used in applications where a nut with a low-profile thickness is needed. This nut can also be used with a standard Hex Nut to create a locking action in your assembly. Earnest Machine stocks the largest selection of Hex Jam Nuts in the industry, offering both inch and metric sizes with a variety of strength levels, thread directions, and finishes to choose from. 

To learn more about Earnest Machine’s line of Hex Jam Nuts, download the spec sheet or give us a call at +44 (0) 1902 711041.

What is a Carriage Bolt?

Carriage Bolts offer easy installation and versatility when assembling a variety of building materials such as wood, plastic, or hardened steel. Earnest Machine stocks Carriage Bolts in a wide range of grades, sizes, and finishes, which can be used in high-stress plow or low-stress wood applications.

To learn more about Earnest Machine’s line of Carriage Bolts, download the spec sheet or give us a call at +44 (0) 1902 711041.

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