Ingeneral, tap tool life can be increased significantly by using a lower percent of thread and we suggest using values between 60% and 70% for most applications. Thread strength is not directly proportional to percent of thread. For example a 100% thread specification is only 5% stronger than a 75% thread specification but requires 3 times the TapDrill Charts | National Pipe Threads NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1/8 27 0.332 (Q) 27 0.348 (S) 1/4 18 7/16 18 29/64 3/8 18 9/16 18 19/32 1/2 14 45/64 14 47/64 3/4 14 29/32 14 15/16 1 11-1/2 1-9/64 11-1/2 1-3/16 1-1/4 11-1/2 1-31/64 11-1/2 1-33/64 916"-18 UNF Carbon Steel Bottoming Tap SKU: DWTB9/16-18 Ships Today! (Order By 3pm EST M-F) List Price: $7.77 Price: $4.12 (You Save $3.65) 9/16"-18 UNF Carbon Steel Bottoming Tap Special Tap and Drill Bit Size Calculator; Metric Tap Drill Bit Size Calculator; Tap Wrench Chart; 4,951. Certified reviews. Thedrill diameter to use in preparation for a tapping operation. Unless otherwise specified, it refers to 75% thread depth for a Tap Cutting tool. For more accurate data, it is recommended to use a Tap Drill Size Calculator that considers the tapping tool type and the required thread depth. 916 - 12 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more Tap Drill Sizes for 9/16 - 12 UNC. If not specified, assume a thread depth of 75%. Inch (UNC/UNF/UNEF) National Pipe (NPT) Dryseal Pipe (BPTF) British Pipe (BSP) ACME; Threading Glossary. 916-18 Unf-2b Drill Size In Mm, Unfied Threads (UNC/UNF/UNEF): Dimensions Formulas, 9/16-18UNF 9/16-18 UNF HSS Straight Handle American standard Machine Die Tap High Speed Steel Wire Tapping Drill Round Die Metal AliExpress. Home; 2023-12-18; Tap Drill Sizes Jarvis Cutting Tools. UNC, UNF, UNEF Thread ANSI B1,1 PDF PDF LoadingCapacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 10.9 ; Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 12.9 ; Excel Spreadheet Design Calculator per. BS: 449: Part 2 requires an active Premium Membership with Engineers Edge ; Class 5 Interference-Fit Threads Torques, Interferences, and Engagement Lengths 716 - 20 UNF : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. Tap Drill Sizes for 7/16 - 20 UNF. If not specified, assume a thread depth of 75%. You can learn more about thread depth in tapping here. TapDrill Sizes for #8 - 36 UNF. If not specified, assume a thread depth of 75%. You can learn more about thread depth in tapping here. To get the tap drill size in other depths, use our Tap Drill Size Calculator . Thread Depth. SAEthread ORB fitting size chart Apr 02, 2020. SAE Straight Thread O-ring (O-Ring Boss) SAE J1926-1 and ISO 11296-1. It is port connection from stud end, also is male to female SAE thread connection fittings. c0HKI.