RIDGID 00-RB UNC-5/8 (37640) 5/8 in. Ratchet Bolt Threader Die Head, Alloy RH, UNC. Our Model No: 37640. The RIDGID 00-RB UNC-5/8 (37640) 5/8 in. Ratchet Bolt Threader Die Head, Alloy RH, UNC is designed for use with the 00-RB (38540) ratchet and handle assembly.
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