Replacement Clamp Nut for all Erva Clamp Mount Products made before year 2020. 3/8-16 Threads.

Fits RB1CL, SRB1CL SRB3CL, SSRB3CL, RB2CL, RB2DCL, RT2CL, RT2D, SACL, SACLR, SACLS, SACLSL, SACLSX, FP6, RT2BRO, BA1G, BA1SL, BA1SLW.