A22B Thread Rolling Machine Parts Catalog Serial # 984 and Higher A22B Thread Rolling Machine Parts Catalog Serial # 984 and Higher Click on a Product to view details. Request Information A22B Pivot Block Assembly Parts A22B Adjustable Work Stop Assembly Parts A22B Double Support Die Holder Assembly Parts A22B Overhung Die Holder Assembly Parts A22B Change Gear/Cam Drive Parts A22B Main Drive Parts A22B Change Gear Compartment Parts A22B Cam Lever Assembly Parts A22B Die Drive Parts A22B Cluster Gear Assembly Parts A22B Oscillating Head Parts