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Van London Twist Lock Adapter, Threaded, 316SS, 1" MPT
https://www.branom.com/shop/1500143-van-london-twist-lock-adapter-threaded-316ss-1-mpt-558598
https://www.branom.com/web/image/product.template/558598/image_1920?unique=c1b9893
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Adapter, T/L 316SS 1 in MPT for twist-lock electrodes, Type: Assembly