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Air-Cooled VW Product Catalogues VW Split Screen Van VW Bay Window Van VW Beetle VW Type 3 VW Thing / Trekker VW Karmann-Ghia VW Engines T1+T4 VW Electrical IGNITION SYSTEMS TOOLS Other (Non VW) Product Catalogues Air Cooled Porsche Rover V8 Parts Ford Kits BMC Era Car Parts Land Rover Kits	Table Of Common (& Uncommon) Bolt/Nut Threads Majority (COURSE) Series In Bold (No Callout Required For Pitch On Drawings) FINE Series Require Full Callout O/D Pitch Tap Drill NOTES M1.6 0.35 1.25mm   M2 0.4 1.6mm   M2.5 0.45 2.05mm   M3 0.5 2.5mm   M3.5 0.6 2.9mm   M4 0.7 3.3mm   M5 0.75 4.2mm   Used By SOLEX For Carb Top Screws Because They Are SpEsHuL M5 0.8 4.2mm   M6 1.0 5.0mm   M7 1.0 6.1mm Intermediate Continental European Size M8 1.0 7.0mm Fine Pitch (Special Use) M8 1.25 6.8mm   M9 1.25 8.3mm Intermediate Continental European Size M10 1.25 8.8mm Fine Pitch (Special Use) M10 1.5 8.5mm   M12 1.25 10.8mm Fine Pitch (Special Use) M12 1.5 10.7mm Automotive Special Pitch (High Tensile) M12 1.75 10.2mm   M14 1.5 12.5mm Fine Pitch (Special Use) M14 2.0 12.0mm   M16 1.5 14.5mm Fine Pitch (Special Use) M16 2.0 14.0mm   M18 1.5 16.5mm Fine Pitch (Special Use) M18 2.5 15.5mm   M20 1.5 18.5mm Fine Pitch (Special Use) M20 2.5 17.5mm   M22 1.5 20.5mm Fine Pitch (Special Use) M22 2.5 19.5mm   M24 2.0 22.0mm Fine Pitch (Special Use) M24 3.0 21.0mm   M27 2.0 25.0mm Fine Pitch (Special Use) M27 3.0 24.00mm   Unified Imperial - Majority (COURSE) Series In Bold Full Callout Required On Drawings For All Threads O/D Pitch Tap Drill NOTES #0 80 TPI 3/64 UNF - D = 0.06" (1.524mm) #1 64 TPI #53 UNC - D = 0.073" (1.8542mm) #1 72 TPI #53 UNF #2 56 TPI #50 UNC - D = 0.086" (2.1844mm) #2 64 TPI #50 UNF #3 48 TPI #47 UNC - D = 0.099" (2.5146mm) #3 56 TPI #45 UNF #4 40 TPI #43 UNC - D = 0.112" (2.8448mm) #4 48 TPI #42 UNF #5 40 TPI #38 1/8 UNC D = 0.125" (3.175mm) #5 44 TPI #37 1/8 UNF #6 32 TPI #36 UNC - D = 0.138" (3.5052mm) #6 40 TPI #33 UNF #8 32 TPI #29 UNC - D = 0.164" (4.1656mm) #8 36 TPI #29 UNF #10 24 TPI #25 UNC - D = 0.19" (4.826mm) #10 32 TPI #21 UNF #12 24 TPI #16 UNC - D = 0.216" (5.4864mm) #12 28 TPI #14 UNF 1/4 20 TPI #7 UNC 1/4 28 TPI #3 UNF 5/16 18 TPI F UNC 5/16 24 TPI I UNF 3/8 16 TPI 5/16 UNC 3/8 24 TPI Q UNF 7/16 14 TPI U UNC 7/16 20 TPI 25/64 UNF - US DOT SeatBelt Spec. 1/2 13 TPI 27/64 UNC 1/2 20 TPI 29/64 UNF 9/16 12 TPI 31/64 UNC 9/16 18 TPI 33/64 UNF 5/8 11 TPI 17/32 UNC 5/8 18 TPI 37/64 UNF 3/4 10 TPI 21/32 UNC 3/4 16 TPI 11/16 UNF 7/8 9 TPI 49/64 UNC 7/8 14 TPI 13/16 UNF 1 8 TPI 7/8 UNC 1 14 TPI 15/16 UNF