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Amazon.com: 6-Piece 1/4-20NC Combination Drill Tap Bit Set SAE, Made of High-Speed Steel with Anti-Rust Blackened Coating, Ideal for Soft Metal, Wood & Plastic, 1/4” UNC-20 Thread Size, 1/4” Hex Shank :
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Amazon.com: 6-Piece 1/4-20NC Combination Drill Tap Bit Set SAE, Made of High-Speed Steel with Anti-Rust Blackened Coating, Ideal for Soft Metal, Wood & Plastic, 1/4” UNC-20 Thread Size, 1/4” Hex Shank :
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Greenlee LDTAPKIT Drill/Tap/Countersink Set, Hss, 7 Pcs., 8-32 to 1/4-20 - Jobber Drill Bits - Amazon.com
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1/4-20 Complete Helical Thread Repair Kit - Includes 3 Lengths of Inserts, HSS Drill Bit, STI Plug Tap & Installation Tool
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