Stainless Steel Plate Lock for Accordions. The set comes with Thumbscrew 5/16" diameter x 1" length.
The lock plate and thumbscrew are sold as a set, but you can also purchase them individually. Options are given above under the title "Buy More Pay Less".
HV Plate Lock with HV Thumb Screw
$18.00Price
REMEMBER to choose the correct option and put the correct quantity in your cart when you place your order.