R2D2 Brass Back Binding Post - M4 Metric - Rear Standoff

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Weight 0.012600
Brand Precision
Material Brass

M4 Metric R2D2 Brass Back Binding Post - Tattoo Machine Supplies

The rear binding post is one of the locations where the clip cord connects to the machine. The R2D2 Brass Back Binding Post is M4 Metric with a length of 13mm for the brass section only. The brass end measures 8mm thick and 8.5mm at the base. There are two holes for attaching the clip cord, located on the sides. The diameter for the screw hole is 4mm. The thread length, or distance of each thread, is 0.75mm. For a quantity of one, you will receive the full R2D2 Back Binding Post Set, as pictured. We also offer two other styles of the Brass Back Binding Post.


  • Quantity: 1 back binding post set
  • Size of brass section: 13mm long, 8mm thick at the end, 8.5mm thick at base
  • Material: brass
  • M4 Metric
  • Connection area for clip cord on tattoo machine
  • Manufacturer: Precision

Related Products:

Brass Back Binding Post
Pawn Brass Back Binding Post

Size Table

Standard Body Jewelry Measurements

The following webchart is a quick reference guide for standard body jewelry measurements and how to measure basic body jewelry. Please print this webchart to help measure your body jewelry accurately.

Size Reference Chart

Visit our PainfulPleasures Infocenter for additional body jewelry information. There, you will find detailed articles on standard body jewelry sizes, how to measure body jewelry, basic body jewelry, and more.

Standard Body Jewelry Threading

Ensure compatibility between standard (non-custom) PainfulPleasures body jewelry parts using the tables below. More information on threading, including custom thread patterns, can be found in our Threading Infocenter article.

Internally threaded jewelry has a threaded post on the top and/or end, which is then inserted into a threaded hole in the barbell shaft.

Internal Thread Patterns by Gauge


18g, 16g

14g, 12g


Internal Thread Pattern

0.8mm or 0.9mm



Externally threaded jewelry has a threaded post on the barbell shaft, which is then inserted into a threaded hole in the top and/or end.

External Thread Patterns by Gauge


18g, 16g

14g, 12g, 10g

External Thread Pattern



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