$1.44 Each, Pin, size 12, fits series: mil-c-24308, mil-c-38999 ser i-iv, mil-c-55302/69, mil-c-83733, use insertion / removal tool m81969/14-04
Guide To Electrical Contact Cleaners - Grainger KnowHow
Electrical Spring Contacts from Atlantic Precision Spring
MXA00010] Detachable magnetic electrical connector - CFE Corp.
Taidacent Hollow Slip Ring Rotary Electrical Contact 2/4/6/12 Wires Collector Ring Conductive Electric Motor Slip Ring Rotating Connector (6 Wires 10A Inner Hole 12.7mm OD 54mm)
Omniball spring-loaded contacts for sliding and rotating connections
How to choose the right contacts for your connector?
Electrical Contact Resistance: Causes and Alleviations, Advanced PCB Design Blog
Don't Leave Electrical Contact Selection to Chance - Norstan
Properties Of Electrical Contact
Electrical Contact Resistance - Battery Design
Electrical contact - Wikipedia
About Electrical Contacts : Repco Inc