F4978-S 4BA Stand-Off Insulator, Made by Jackson Brothers NEW H84

Stand-Off Ceramic Insulator made by Jackson Bros, part number F4978-S 4BA.Studded both ends  Our Stand-Off Insulators are used in large quantities in every branch of the electronics industry.  They do not just insulate, they Isolate. 

Stoved-on silicone treatment repels moisture so that insulation is unaffected by humidity and "tracking" is prevented.  No solder, plastic or adhesive is used in construction.