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Carmex Internal External Whitworth Threadmill Insert 21mm 16 TPI 21 16 W MT7 Insize American Standard Thread Ring Gage No. 1 2–20UNF NOGO – Series 4121 1A2N BT50 shank for BT50 CNC 11102 BT50 shank for BT50 CNC spindles Thickness of Leaves Included: 0 Ordering Code: 21 16 W MT7 Mill Thread Insert – Whitworth 55°
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