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

M3x0.5 Nylock Nut, Steel, Zinc Plate 

Specifications:

• Quantity: 100
• Material: Steel
• Coating: Zinc plated
• Thread: M3x0.5
• Width across hex: 5mm
• Weight: 0.096 pounds

M5x0.8 Nylock Nut 

Specifications:

• Quantity: 100
• Material: Steel
• Coating: Zinc plated
• Thread: M5x0.8
• Width across hex: 8mm
• Weight: 0.232 Pounds

Specifications:

• Material: Steel
• Thread: 10-32
• Nut Diameter: 0.344"
• Nut Height: 0.090"
• Shank Diameter: 0.311"
• Shank Height: 0.311"

M5 x 0.8 Nylock Nut 

Specifications:

• Quantity: 50
• Material: Steel
• Coating: Zinc plated
• Thread: M5 x 0.8
• Width across hex: 8mm
• Weight: 0.116 pounds

2.5 inch long thread rolling (thread forming) screw 

The Hex Washer Head has a flat washer that extends beyond the sides, providing it with a greater bearing surface than a normal hex head fastener. The washer and the Hex Head are bonded together as one piece; this offers greater protection to the mating surface than a standard 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, retards the corrosion rate in a normal atmosphere. 

Specifications:

• Material: steel
• Length: 2.5 inch
• Thread size: 1/4-20
• Type: Thread rolling screw, Trilobe
• Weight: 0.03 pound
• Finish: Zinc
• Drive: Hex - unslotted, 3/8" wide across flats
• Optimal hole size for thread forming: 0.23 inch diameter
• Weight: 0.034 pounds

This item can only be purchased in multiples of 10

This 1/4-20 screw is 1 in. long. This screw is thread forming which means it creates a secure connection with the parts it attaches to without the use of a nut.

Specifications

• Drive: 3/8 in. Unslotted External Hex
• Finish: Zinc
• Head: Hex Washer
• Length: 1 in.
• Material: Steel
• Thread: 1/4 -20
• weight: 0.016 lbs

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

• Grade: Class 8
• Thread Size: 0.5
• Thickness: 2.4 mm
• Diameter-Thread Size: M3-0.5
• Material: Steel

This Nylock jam nut can be paired with 6-32 screws to mount S3 Tubing (am-3594) to brackets within the S3 Ecosystem.

Specifications:

• Material: Steel
• Coating: Zinc plated
• Thickness: 0.140 in.
• Thread: Coarse
• Thread Size: 32
• Type: Nylon Insert Lock Nut
• Wrench Size: 5/16"

Specifications:

• Material: Alloy Steel
• Finish: Zinc
• Thread: 1/4"-20
• Length: 2.25 in.
• Head: Flat Socket Cap Screw
• Weight: 0.031 Pounds

Here is a versatile extruded aluminum, hex profile. The outside of this part is a 1/2" hex with small concave dimples which act as weight savings. There is an inside hole tapped to 1/4-20 thread profile.

The outside hex size fits a 1/2" wrench or socket. 

Specifications:

• Material: 6063 Aluminum
• Inside thread: 1/4-20
• Outside width: 0.495 inch hex, across flats
• Length: 0.99 (+/- 0.02) inch
• Weight: 0.014 pound