Nelson Fastener Systems Aluminum Navy Annular Pin N3A

N3A Navy pins are welded for the attachment of insulation. The insulation is impaled over the welded studs and retained with caps that are driven onto the studs, and lock onto the annular rings. The 5/16” diameter welded end on Nelson N3A pins permits welding without the use of inert gas shielding, which is normally required when welding aluminum studs. The flat top caps for use with N3A studs are usually supplied in aluminum. They can also be supplied in plated mild steel or stainless steel, per the N3P Annular Ring stud. The standard N3A cap is shown below and is supplied in aluminum.