Pololu - Aluminum Standoff: 3/4 Length, 4-40 Thread, M-F (4-Pack)

These hexagonal male-female aluminum standoffs keep parts spaced 0.75" (19 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16"-wide standoffs have 4-40 threads. The standoffs are sold in packs of 4.
These hexagonal male-female aluminum standoffs keep parts spaced 0.75 (19 mm) apart and are great for building a multi-level robot chassis. Both ends of these 3/16-wide standoffs have 4-40 threads. The standoffs are sold in packs of 4.

Female To Female Aluminum Hex Standoff (pack Of 4) at Rs 124.99, Hexagonal Standoff

Female To Female Aluminum Hex Standoff (pack Of 4) at Rs 124.99, Hexagonal Standoff

SO4-M4-20

Pololu - Aluminum Standoff for Raspberry Pi: 11mm Length, 4mm M2.5 Thread, M-F (4-Pack)

These hexagonal male-female aluminum standoffs keep parts spaced 0.75 (19 mm) apart and are great for building a multi-level robot chassis. Both ends

Aluminum Standoff: 3/4 Length, 4-40 Thread, M-F (4-Pack)

Aluminum Standoff: 1/2 Length, 2-56 Thread, M-F (4-Pack)

Pololu 1942 - Aluminum Standoff: 1/2 Length, 2-56 Thread, M-F (4-Pack)

Aluminum Standoff: 3/8 Length, 4-40 Thread, M-F (4-Pack) at MG Super Labs India

Aluminum Standoff: 3/4 Length, 4-40 Thread, M-F (4-Pack) at MG Super Labs India

F13: Line Following Robot - Embedded Systems Learning Academy

Pololu 2086 - Aluminum Standoff: 1/8 Length, 4-40 Thread, F-F (4-Pack) - Kamami on-line store

Aluminum Standoff: 1 Length, 4-40 Thread, M-F (4-Pack), POLOLU-1950

David and Fang's dead reckoning robot based on the mbed LPC1768 - Pololu

Aluminium Stand-off / Spacer Range - Proto-PIC