Pololu - Machine Screw: #4-40, 3/8″ Length, Phillips (25-pack)

This #4-40, pan-head screw is 3/8″ (0.375″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

These 1/8-long hexagonal female-female aluminum standoffs keep parts spaced 0.125 inches (3.2 mm) apart. They are like elongated, 3/16″-wide hex

Aluminum Standoff: 1/8 Length, 4-40 Thread, F-F (4-Pack)

Aluminum Standoff: 3/8 Length, 4-40 Thread, F-F (4-Pack), POLOLU-2090

Chibikart: Rapid-Prototyping a Subminiature Electric Go-Kart Using Digital Fabrication and Hobby Components : 46 Steps (with Pictures) - Instructables

Pololu 2091 - Aluminum Standoff: 1/2 Length, 4-40 Thread, F-F (4-Pack) - Kamami on-line store

Machine Screw: 4-40, 1/4 Length, Phillips (25-pack) - Snail Shop

Pololu Aluminum Scooter Wheel Adapter for 1/4″ Shaft

Pololu - Mounting Bracket for Standard-Size Servos

Pololu Blog (Page 28)

These aluminum gearmotor brackets let you securely mount Pololu’s 25D mm metal gearmotors to your project. The brackets are sold in pairs, and each

Pololu 25D mm Metal Gearmotor Bracket Pair

Pololu Multi-Hub Wheel w/Inserts for 3mm and 4mm Shafts - 80×10mm

Made in USA - Phillips Drive #4-40 UNC 3/4″ Length Under Head

10pcs M6*8 10 12 15 20 25 30 35 40 Flat Head Phillips Screws Nylon Plastic Screw M6x8 M6x10 M6x15 M6x20 M6x30 M6x40 - Screws - AliExpress

4-40 x 1 Phillips Pan Head Machine Screws,Stainless Steel,Full Thread,Right Hand,Pack of 100: : Industrial & Scientific

10pcs M6*8 10 12 15 20 25 30 35 40 Flat Head Phillips Screws Nylon Plastic Screw M6x8 M6x10 M6x15 M6x20 M6x30 M6x40 - Screws - AliExpress

A0308132, Self-tapping screw 3 x 8 mm (T10) - OKW