Lug nuts are between standard metric sizes (16mm too small, 17mm too loose), making brake service impossible without damaging hardware or buying replacements.

No commonly available socket size (16.5mm or SAE equivalent) fits aftermarket or swollen lug nuts, forcing purchase of entire set of new lug nuts.

Severity

3Medium

Willingness to Pay

implied

Added

Apr 30, 2026

Implied Software Gaps

App that uses measurement input to identify non-standard fasteners and recommend exact socket sizes

App Concept

LugNutPro Socket Finder

A mobile app and socket set combining a digital caliper tool with a database of aftermarket lug nut sizes. Simply measure the nut with the app-integrated digital caliper, get the exact socket size needed, and purchase individual sockets rather than whole sets. Eliminates guesswork and unnecessary replacement of hardware.

Key Features

Digital caliper with Bluetooth to auto-detect lug nut size
Database of aftermarket and OEM lug nut specs by vehicle model
One-click purchase of the exact socket size (individual)
Swollen lug nut detection and alternative removal tips

Target Users: DIY mechanics and professional auto technicians working on modern vehicles with non-standard lug nuts

Revenue Model: Freemium app with $4.99/month subscription for unlimited socket size lookups; affiliate revenue from socket sales and in-app purchases of individual sockets

Existing Solutions Mentioned

standard impact sockets (16mm, 17mm)

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