Screw Size Drill Bit Chart vs Pump Mate

Which drill bit for a #8 screw in hardwood? ScrewGuide answers in two taps — the complete screw, bolt and drill-bit chart with the exact pilot hole for the material in front of you, fully offline. Printed charts give you one number and hope you guessed the material right. ScrewGuide is material-aware: pick a screw, pick softwood, hardwood, MDF/chipboard, drywall, sheet metal or plastic, and it works out the pilot, clearance and countersink diameter for that exact combination — then names the nearest real drill bit you actually own, in millimetres or inches. WHAT YOU GET - The right pilot hole every time, calculated per material, so boards stop splitting and screws stop stripping - 20 screw sizes cross-referenced: metric M2-M12, US gauge #4-#14 and tapered wood screws, with major and minor diameter, thread pitch, TPI, head diameter and typical lengths - A full 68-bit drill chart in one place: metric, fractional, number and letter bits with decimal and millimetre equivalents - Measured something and don't know what it is? Dial in a diameter and get the nearest screw and the nearest drill bit instantly - A metric tap-drill chart, so you can thread a hole without hunting a reference online - Head styles and drive types decoded — Phillips, Pozidriv, Square/Robertson, Torx and hex — plus why pilot holes work at all PERFECT FOR - Woodworkers and carpenters who refuse to split another board - DIYers assembling flat-pack, hanging shelves or mounting a TV - Makers and 3D-printing hobbyists living in M3 and M4 hardware - Trades and hobby mechanics switching between metric and imperial on the same job WHY NOT JUST GOOGLE IT? Because the garage has no signal, your hands are dirty and the search results argue with each other. ScrewGuide keeps every number on the device, opens instantly, and gives one clear answer per material instead of ten forum opinions. Save the sizes you use most and they are one tap away next time. PRIVACY No account, no sign-up, no ads, no tracking, no internet connection required. Your saved sizes and unit preference stay on your iPhone. FULL ACCESS Material-aware pilot, clearance and countersink sizing, the complete drill-bit chart, the tap-drill chart and the size finder unlock with full access. Choose a weekly or yearly subscription, or pay once for lifetime access — one payment, no renewal. Ten common screw sizes stay browsable for free so you can try the reference first. Open ScrewGuide before the drill comes out and get the hole right the first time. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com

Pump Mate is a professional hydraulic calculator for engineers, designers, and field technicians who size and analyze centrifugal pumps. Run a quick power estimate in seconds, or use Advanced Mode for a complete hydraulic analysis—all offline, with metric (SI) and imperial units. CALCULATE WITH CONFIDENCE • Quick Mode: hydraulic power and motor sizing from flow and head. • Advanced Mode: Total Dynamic Head (TDH), NPSH available, pipe and fitting losses, efficiencies, and system-curve inputs. • Fluid support: water and engineering fluid properties, plus Pro slurry-hydraulics tools. • Projects and history: save, organize, and revisit calculations by job. SELECT AND REVIEW PUMPS • Browse an offline pump-curve catalogue with visible data provenance. • Match curves to an Advanced Mode duty point. • Apply published impeller and stage variants where available. • Pump Mate Pro Selection Assistant screens POR position, efficiency, absorbed power, NPSH margin, and tip speed at the duty point. • Compare curves and inspect H-Q, efficiency, power, and NPSHr behavior. PROFESSIONAL REPORTING • Export Quick and Advanced calculations as structured PDF reports. • Advanced reports can include calculation context, hydraulic tables, selection results, and charts. • Add report identity and branding details for clearer project handoff. BUILT FOR FIELD WORK • Offline-first for plants, jobsites, and low-connectivity locations. • Metric and imperial units. • English, Spanish, French, and Portuguese interface. • Light and dark themes. • Built-in pumping fundamentals and rendered equations. • Clean, ad-free experience. PUMP MATE PRO Pump Mate Pro is an optional one-time purchase that unlocks the expanded curve library, Selection Assistant verdicts, pump comparison, professional PDF capabilities, slurry analysis, unlimited projects, and unlimited calculation history. The core hydraulic calculators remain free. Pump Mate supports engineering judgment; always verify results, source data, equipment limits, and manufacturer documentation before final selection or installation.