Blackjack ACC Adaptor for ⌀1.2 mm Whip

The A1 Adaptor Assembly is made for the BlackJack Base with a 5/16-24UNF screw-on-type female side and to carry a ⌀1.2 mm Antenna Whip on the other side. It is made up of:
1 x Chromed Adaptor, 20 mm long
1 x M4x4 Stainless Steel Grub Screw