AI Bolt Identifier — Identify Any Bolt from a Photo

Take or upload a photo of any bolt, screw, or fastener and get the wrench size, thread pitch, head type, and OEM-referenced torque spec in seconds. Works on automotive, small-engine, and heavy-equipment bolts — no calipers, no manuals, no guessing. Set your machine once (year / make / model) and the AI cross-references our 100,000+ fastener database for accurate, vehicle-specific specs.

How does the AI bolt identifier work?

Upload a clear photo of the bolt head and shank (ideally next to a coin or ruler for scale). Our vision model measures the head across-flats, estimates thread diameter and pitch, classifies the head type (hex, Torx, Allen, 12-point) and grade markings, then cross-references that against the OEM fastener database for the machine you specified. You get a result card with wrench size, thread spec (e.g. M10x1.25), torque value in ft-lbs and Nm, and a direct replacement link.

How accurate is it from a photo?

Accuracy is highest when you (1) include a scale reference like a coin in the frame, (2) shoot perpendicular to the bolt head, and (3) pick a machine in the dropdown so the AI can constrain its guess to fasteners that machine actually uses. With those three conditions met, wrench-size identification is reliable for standard hex and 12-point bolts. Grade markings and thread pitch are tougher from a photo alone — for safety-critical fasteners (suspension, brakes, head bolts) always verify with a thread pitch gauge.

Does it work on metric and SAE bolts?

Yes — both. The identifier returns metric size (M6, M8, M10, M12 …) and the closest SAE equivalent (1/4", 5/16", 3/8", 7/16" …) along with the correct wrench / socket size in both standards. For mixed-fleet shops working on imports and domestics, the result card flags which standard the OEM specifies so you do not strip threads cross-threading metric into SAE.

Can I scan a whole machine at once?

Yes. Multi-bolt sessions let you scan every fastener on a machine in one sitting — each scan stacks into a running list with a wrench summary at the top so you know exactly which sockets to pull out of the box before you start the job. Useful for deck-blade swaps on riding mowers, brake jobs on cars, and any disassembly where you do not want to walk back to the toolbox three times.

What if the bolt is rusted or the head is rounded?

The AI still identifies wrench size from the across-flats measurement even on heavily rusted bolts, as long as the flats are intact. For rounded or stripped heads, photograph the unmounted bolt or a clean adjacent identical bolt for comparison. You can also drop into the manual Bolt Identifier tool for visual matching against a head-marking and grade chart.

Is the AI bolt identifier free?

Yes — the AI identifier is free to use, with no sign-up required. We monetize through optional affiliate links to recommended sockets, wrenches, and replacement fasteners on Amazon (clearly disclosed). Saving your machine profile for repeat use requires a free account.

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