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American System 3pcs 1/8-40 1/8-44 1/4-40 3 Sizes Nitriding Spiral Pointed Tap Hss Hole Drilling Processing Thread Tap Drill Bit - Tap & Die - AliExpress
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8-40 Drill & Tap, 4 piece set for rifle scope mounting. CARBIDE Drill, HSS TAP. | OZZISTRAIGHTSHOOTER
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Amazon.co.jp: UNC UNF UNEFUN Right Screw Tap and Die Set 2pcs HSS Hand Tap Drill Bit 5/163/8 7/16 1/2 5/8 3/4-18 20 24 28 40-UNF 1l2-20 : DIY, Tools & Garden
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UNC UNF Ø Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size (inch) #0 - - 80 3/64 #1 64 0.059 (#53) 72 0.059 (#53) #2 56 0.0
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Amazon.com: Century Drill & Tool 95203 Carbon Steel Pipe Thread Tap, 3/8-18NPT : Industrial & Scientific
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UNJC Minor Ø Recommended Drill Size Ø Pitch (TPI) Min Max Drill Size Decimal (in) #4 40 .0877 .0942 2.30mm .0906 #5 40 .1007 .
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