This is a Trilobe, thread forming, or thread rolling screw, ideal for applications where the screw is being threaded into plastic or metal. 

A flat washer is part of the 5/16 hex head, providing more surface area contact than a regular hex head. The increased bearing area decreases the likeliness of crushing mating surfaces. Trilobe, or Thread Rolling, screws have a blunt tapered point that requires a pre-drilled or punched hole; eliminates chips and permits replacement with standard screw. Zinc plating froms a zinc carbonate film that greatly retards the corrosion rate in a normal atmosphere, which is similar to the aluminum oxide film that forms on aluminum that accounts for its low corrosion rate. 

Product Overview:

• Quantity: 50
• Diameter: #10
• Finish: Zinc
• Head: 5/16 Hex with integral washer
• Thread Length: 3/4"
• Material: Steel
• Thread Size: 10-24
• Thread Type: Trilobe, Thread Rolling
• Weight per Screw: 0.007 lbs
• Package Weight: 0.34 lbs

Specifications:

• Material: Steel
• Coating: Zinc Plated
• Thread: 10-32
• Length: 3/8"
• Head: Pan Head Phillips

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 10-32
• Length: 5/8 inch
• Head: Socket Head Cap Screw
• Yellow Nylon Thread Lock Patch

Statistics:

• Material: Steel
• Coating: Zinc plated
• Thread: #10-32
• Length: 1-1/2 inch
• Head: Socket Head Cap Screw

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 10-32
• Length: 1-3/4"
• Head: Socket Head Cap Screw

#10-32 x 2" long Socket Head Cap Screw 

Specifications:

• Quantity: 25
• Material: Steel
• Coating: Zinc plated
• Thread: #10-32
• Length: 2 inch
• Head: Socket Head Cap Screw
• Weight: 0.422 pounds

#10-32 x 2-1/4" long Socket Head Cap Screw 

Specifications:

• Quantity: 25
• Material: Steel
• Coating: Zinc plated
• Thread: #10-32
• Length: 2-1/4 inch
• Weight: 0.478 pounds
• Head: Socket Head Cap Screw

This steel shoulder screw is used in the EVO Shifter Four Tooth Dog Gear (am-3568).

Specifications:

• Thread: #4-40
• Length: 0.75"
• Thread Length: 0.125"
• Weight: 0.006 Lbs
• Head: Socket Head Cap Screw

#4-40 x 7/8" Long with 1/2" shoulder Socket Head Cap Screw used in the Dog Gear

Specifications:

• Quantity: 1
• Thread: #4-40
• Length: 7/8 inches
• Shoulder Length: 1/2 inches
• Weight: 0.001 pounds
• Head: Socket Head Cap Screw

These 6-32 1.25" Hex Head Machine Screw can be used for fastening Nubs to other motion products.

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 6-32
• Length: 1.25"
• Head: Hex
• Weight: 0.0045 lbs

These screws are used within the FIRST STEAMWORKS? Gear. The FIRST STEAMWORKS? Gear uses 20 screws for assembly. This screw is available in quantities of 25, giving you a few extras when assembling.

Specifications:

• Diameter: #8
• Diameter - Thread Size: #8 - 15
• Drive: Phillips
• Drive Size: #2
• Finish: Zinc
• Head: Pan
• Length: 5/8"
• Material: Steel

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 1/4-20
• Length: 1/2"
• Head: Button Head Cap Screw

This is a thread rolling screw that is 0.75 in. long.

This item can only be purchased in multiples of 10

Specifications

• Drive: 3/8 in. Unslotted Hex
• Finish: Zinc
• Length: 0.75 in.
• Material: Steel
• Thread: 1/4-20
• Weight: 0.02 lbs

This is the 1/4-20 x 1in Thread Rolling Screw found in the 2011 C-Base FIRST kit. 

Specifications:

• Sold in a quantity of 10
• Weight:0.170 pounds

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 1/4-20
• Length: 1.25"
• Head: Button Head Cap Screw

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thread: 1/4-20
• Length: 1.5"
• Head: Socket Head Cap Screw