# WhatSizeBolt

> Free, OEM-accurate bolt sizes, torque specs, and fastener data for vehicles, small engines, and heavy equipment. Identify any bolt by photo or by hand; look up wrench/socket sizes, torque values, thread pitch, grade markings, and lug-nut specs.

## Key tools & references
- [AI Bolt Identifier](/ai-bolt-identifier): Identify a bolt from a photo — wrench size, thread pitch, head type, and torque.
- [Vehicle Fastener Search](/): OEM bolt sizes and torque specs by year, make, and model — search on the homepage.
- [Bolt Size Chart](/bolt-size-chart): Metric (M3-M24) and SAE bolt sizes, head/wrench sizes, and thread pitch.
- [Standard Torque Specs](/standard-torque-specs): Torque by grade and size, dry vs lubricated.
- [Bolt Head Markings Guide](/head-markings): SAE grade lines and metric property classes (8.8/10.9/12.9).
- [Metric / SAE Converter](/tools/metric-sae-converter): Convert wrench, socket, and bolt sizes.
- [Resources & embeddable charts](/resources): Free reference charts, a bolt-finder widget, printable PDFs, and a fastener FAQ.

## Vehicle fastener specs
Per-vehicle bolt sizes, torque values, thread pitch, and lug-nut specs are organized under /vehicles:
- [Vehicle directory — all supported makes & models](/vehicles): Browse every supported vehicle.
- URL patterns: make index /vehicles/{make}, model specs /vehicles/{make}/{model}, year-specific specs /vehicles/{make}/{model}/{year}.

## All pages
- [Axle Nut Torque Specs Chart — by Year, Make & Model | WhatSizeBolt](/axle-nut-torque): Axle nut torque specs chart for Toyota, Honda, Ford, Chevy, Subaru, Hyundai & Kia — plus per-vehicle CV axle / hub nut torque and socket size lookup. Free.
- [Best Gifts for Toyota Owners and DIY Mechanics (2025) | WhatSizeBolt](/knowledge-hub/best-gifts-for-toyota-owners): Shopping for a Toyota owner or home mechanic? Here are our top picks — from quality keychains to essential tools every Toyota tech needs in their kit.
- [Bolt Identifier: Find Any Bolt Size, Grade & Thread Pitch Instantly | WhatSizeBolt](/bolt-identifier): Upload a photo or enter a bolt's head marking and instantly identify the size, grade, thread pitch, and type. Works on metric, SAE, JIS, and specialty fasteners. Free tool.
- [Bolt Thread Pitch Chart — Metric M1.6–M36 & SAE UNC/UNF Reference | WhatSizeBolt](/thread-pitch): Complete thread pitch chart for metric bolts M1.6–M36 (ISO 261) and SAE #4–1-1/4 inch (ASME B1.1). Includes an interactive thread pitch calculator, coarse and fine pitch values, wrench sizes, and FAQ.
- [Briggs & Stratton Blade Bolt Torque Specs | WhatSizeBolt](/small-engines/briggs-stratton-blade-bolt-torque): OEM blade bolt torque specs for Briggs & Stratton engines: 450 Series, 575EX, 625EX, Intek V-Twin. Includes thread size, bolt size, and important left-hand thread warning. Free reference.
- [Case Skid Steer Torque Specs — 1825, 1835C, 1840, 1845C, 170B | WhatSizeBolt](/heavy-machinery/case-skid-steer-torque-specs): OEM torque specifications for Case skid steers and excavators. Hydraulic fittings, track drive bolts, loader arm fasteners, and engine specs for 1825, 1835C, 1840, 1845C, and 170B models.
- [Contact WhatSizeBolt - Get Support](/contact): Contact WhatSizeBolt. Have questions? Get in touch with our team for support and inquiries.
- [Engine & Transmission Mount Torque Specs by Vehicle | WhatSizeBolt](/engine-mount-torque): Free OEM-referenced engine and transmission mount torque specs — motor mount and trans mount bolt torque, socket, and thread — by year, make and model.
- [Fastener Guides — Torque Specs, Bolt ID & How-Tos | WhatSizeBolt](/knowledge-hub): Free mechanic-written guides on torque specs, bolt identification, thread pitch, and fastener tools. Practical how-tos for vehicles, small engines, and DIY repairs.
- [Free Printable Mower Blade Bolt Torque PDF Cards — 20 Brands | WhatSizeBolt](/shop/mower-cards): Download free printable mower blade bolt torque PDF cards for Toro, Husqvarna, John Deere, Cub Cadet, Kubota, and 15 more brands. Print at 4x6, laminate, keep in the shop.
- [Generator Bolt Torque Specs — Honda, Generac & Briggs](/small-engines/generator-bolt-torque): Generator engine torque specs: spark plug, head bolt, flywheel nut & drain plug. Covers Honda EU/GX, Generac, Briggs, Kohler, Champion & Predator.
- [Grade 8.8 Bolt Torque Chart — M5 to M36 in ft-lbs & Nm (8.8, 10.9, 12.9)](/resources/metric-bolt-torque-chart): Grade 8.8, 10.9, and 12.9 metric bolt torque chart — M5 through M36, dry values in ft-lbs and Nm. Free printable PDF. Covers M8, M10, M12, M14, M16, M20, M24, M30.
- [Heavy Equipment Torque Specs & Fastener Data | WhatSizeBolt](/heavy-machinery): OEM torque specifications and fastener data for heavy equipment — Case skid steers, Kubota mini excavators, and more. Hydraulic fittings, track drive bolts, loader arm fasteners.
- [Honda EU2000i Torque Specs — Spark Plug, Head Bolt, Flywheel Nut | WhatSizeBolt](/small-engines/honda-eu2000i-torque-specs): Complete Honda EU2000i torque specifications including spark plug (13 ft-lb), head bolt (155–175 in-lb), flywheel nut (72–80 ft-lb), valve clearances, and oil drain bolt. Covers EU2000i, EU2200i, and EU3000iS.
- [Honda Small Engine Spark Plug Torque & Gap Specs | WhatSizeBolt](/small-engines/honda-spark-plug-torque): Honda GCV160, GCV190, GX160, GX200 spark plug torque specs, gap settings, and OEM plug recommendations. Free reference for Honda mower, generator, and pressure washer engines.
- [How to Measure a Bolt: Length, Diameter & Thread Pitch | WhatSizeBolt](/blog/how-to-measure-bolts-complete-guide): Step-by-step guide to measuring bolt length, diameter, and thread pitch for metric and SAE fasteners. Includes interactive bolt size identifier, real photos, common pitch tables, and the most common measuring mistakes to avoid.
- [How to Tell If a Bolt Is Metric or Standard (Without Any Tools) | WhatSizeBolt](/knowledge-hub/metric-vs-standard-bolt): 5 reliable ways to identify metric vs standard (SAE) bolts without tools. Learn to read head markings, count threads, check hex size, and use a nut test. Works on any bolt, screw, or fastener.
- [HTML Sitemap — WhatSizeBolt](/html-sitemap): Complete index of all vehicle makes, models, and content pages on WhatSizeBolt. Fastener torque specs, bolt size charts, and lug nut torque for every vehicle.
- [Husqvarna Chainsaw Torque Specs — 440, 450, 455, 460 | WhatSizeBolt](/small-engines/husqvarna-chainsaw-torque): OEM bar nut torque, spark plug torque, and fastener specs for Husqvarna chainsaws — 440, 445, 450, 455 Rancher, 460 Rancher. Includes clutch cover and carburetor bolt specs.
- [International Scout Fastener Specs | WhatSizeBolt](/scout-fasteners): Specialized fastener database for International Harvester Scout II, 80, and 800. Authentic torque specs and bolt sizes for restoration.
- [Kawasaki Engine Torque Specs — FR, FX, FH Series | WhatSizeBolt](/small-engines/kawasaki-engine-torque-specs): OEM torque specifications for Kawasaki FR651V, FR691V, FR730V, FX691V, and FH series V-Twin engines. Blade bolts, head bolts, spark plugs, flywheel nuts. Free reference.
- [Kohler Engine Torque Specs — XT, Courage, Command | WhatSizeBolt](/small-engines/kohler-engine-torque-specs): OEM torque specifications for Kohler small engines: XT650, XT675, Courage SV, and Command CV V-Twin. Blade bolts, head bolts, spark plugs, flywheel nuts, and oil drain plugs.
- [Laminated Bolt Reference Card — Printed & Mailed | WhatSizeBolt](/shop): Get OEM torque specs and bolt sizes for your vehicle on a laminated 4x6 card, shipped to your door for $9.99. Waterproof, garage-ready. Pick your vehicle and order in 60 seconds.
- [Lawn Mower Blade Bolt Torque Specs (Walk-Behind, by Brand)](/small-engines/lawn-mower-bolt-torque): Walk-behind lawn mower blade bolt torque for Briggs & Stratton, Honda GCV, Kohler & more — plus head bolt, spark plug & flywheel nut specs. Free.
- [Lug Nut Torque Specs Lookup — Every Car by Year, Make & Model](/lug-nut-torque): Look up OEM lug nut torque specs, lug pattern, thread size & socket size for any car, truck or SUV. Free, instant, no sign-up. VIN lookup supported.
- [OEM Bolt Part Number Cross-Reference — Find Replacement Fasteners | WhatSizeBolt](/tools/parts-cross-reference): Look up OEM fastener part numbers from Honda, Briggs & Stratton, John Deere, Kohler, Toyota, Ford, and GM. Find the exact generic equivalent, cross-reference part numbers, and where to buy.
- [Oil Drain Plug Sizes by Make - Complete Guide | WhatSizeBolt](/knowledge-hub/oil-drain-plug-sizes-by-make): Complete oil drain plug size guide for Honda, Toyota, Ford, GM, Nissan. Torque specs, socket sizes & emergency solutions. Bookmark this →
- [Partners | WhatSizeBolt](/partners): The sites and tools WhatSizeBolt partners with. We work with ServiceSageAuto to help DIY vehicle owners track maintenance schedules and service intervals.
- [Predator Engine Torque Specs — 212cc, 420cc, 670cc | Harbor Freight | WhatSizeBolt](/small-engines/predator-engine-torque-specs): Predator engine torque specs for 212cc, 301cc, 420cc, and 670cc V-Twin. Spark plug, head bolt, flywheel nut, oil drain, valve clearances, and bolt sizes for Harbor Freight Predator and DuroMax engines.
- [Pressure Washer Bolt Torque Specs — Honda, Briggs, Generac](/small-engines/pressure-washer-bolt-torque): Pressure washer engine torque specs: spark plug, head bolt, flywheel nut & pump bolt. Covers Honda GC160/GC190, Briggs 850–950 & Generac OHV.
- [Privacy Policy - WhatSizeBolt](/privacy-policy): WhatSizeBolt privacy policy. Learn how we collect, use, and protect your personal information when you use our fastener lookup and torque spec tools.
- [Riding Mower Bolt Torque Specs: Blade, Deck & Engine [All Brands]](/small-engines/riding-mower-bolt-torque): Riding mower torque specs: blade bolt, spindle nut, head bolt & spark plug. Covers Husqvarna, John Deere, Cub Cadet, Toro, Kohler & Kawasaki. Free.
- [Small Engine Torque Specs & Bolt Sizes — All Brands & Equipment](/small-engines): OEM torque specs and bolt sizes for small engines: blade bolt, spark plug, head bolt & oil drain plug. Covers Briggs & Stratton, Honda, Kohler, Kawasaki, Generac & more.
- [Spark Plug Socket Sizes by Vehicle - Complete Guide | WhatSizeBolt](/knowledge-hub/spark-plug-socket-sizes-by-vehicle): Complete spark plug socket size guide. Avoid stripped threads and engine damage. Torque specs and socket charts for all makes. Save now →
- [Suspension & Steering Bolt Torque Specs by Vehicle | WhatSizeBolt](/suspension-torque): Free OEM-referenced suspension and steering torque specs — control arm bolts, ball joint nuts, tie rod ends, sway bar links, strut mounts, and shock bolts — by year, make and model.
- [Tecumseh Engine Torque Specs — HM80, HM100, LH195, OHV Series | WhatSizeBolt](/small-engines/tecumseh-engine-torque-specs): Tecumseh engine torque specs and valve clearances for HM80, HM100, LH195, TVXL, OH195, and Snow King series. Head bolt torque, spark plug specs, flywheel nut, and ignition coil air gap.
- [Terms of Service - WhatSizeBolt](/terms-of-service): WhatSizeBolt terms of service. Read our terms and conditions for using our website and tools.
- [TTY Bolts Explained — Torque-to-Yield Guide for Mechanics (2026)](/knowledge-hub/tty-bolts): TTY bolts (torque-to-yield) stretch permanently when tightened and must never be reused. Learn how to identify TTY fasteners, why they fail, and which engine bolts are always torque-to-yield.
- [Vehicle Coverage: Every Supported Car, Truck & SUV | WhatSizeBolt](/vehicle-coverage): Check our massive database of supported vehicles. We provide detailed fastener specs for thousands of makes and models from 1990 to 2025. See if your car is listed.
- [VIN Lookup for Lug Nut Torque | WhatSizeBolt](/vin): Paste a 17-character VIN to instantly find the lug nut torque, lug pattern, thread and socket size for your vehicle. Uses NHTSA public data.
- [What Oil Does My Engine Need? — Small Engine Oil Finder | WhatSizeBolt](/tools/oil-finder): Find the correct oil type, capacity, filter, and change interval for your small engine. Covers Briggs & Stratton, Honda, Kohler, Kawasaki, Generac, Predator, Echo, Stihl, Husqvarna, and more.
- [What Size Socket for My Bolt? — Wrench & Socket Size Chart | WhatSizeBolt](/tools/wrench-socket-finder): Find the right wrench or socket size for any bolt — metric M3 to M24 and SAE 1/4 to 1 inch. Or find what bolts your wrench fits. Includes brand exceptions (Toyota, Honda, GM, Ford), drive sizes, and vehicle guides.
- [Wheel Bolt Pattern (PCD) Guide — Measure & Common Sizes | WhatSizeBolt](/wheel-bolt-pattern): What a wheel bolt pattern (PCD) is, how to measure 4-, 5-, and 6-lug patterns, and a reference of common patterns like 5x114.3. Free guide.
- [Wheel Lug Nut Sizes & Torque Specs — Complete Guide](/knowledge-hub/wheel-lug-nut-sizes-torque-specs): Find the correct lug nut torque spec, socket size, and thread pitch for your vehicle. Covers all major makes.