utilities
Nuts & Bolts
Every screw size, tap drill, and clearance hole in your pocket. Works offline.
A complete fastener reference for machinists, engineers, hobbyists, and DIY enthusiasts. Look up screw dimensions, tap drill sizes, and clearance holes for both metric (M1-M36) and imperial (#0-2") fasteners, plus head type dimensions, drive sizes, and unit conversions. Everything is stored on your device, so it works in workshops, garages, and job sites with no connection. No flipping through reference books, no searching online for specs you need right now at the bench.
The Problem
You're at the bench and need a tap drill size, thread spec, or clearance hole right now, but the workshop has no signal and the reference charts are buried somewhere across the room.
The Solution
Nuts & Bolts keeps the full fastener reference on your device. Look up metric and imperial thread dimensions, tap drills, clearance holes, and head type specs in seconds, with no internet required and no flipping through charts.
Features
Key Capabilities
Works completely offline
All fastener data lives on your device. No connection needed in the shop, garage, or job site.
Metric fasteners M1-M36
Thread major, minor, and pitch diameters with both coarse and fine pitch specifications.
Imperial fasteners #0-2"
UNC and UNF thread data across number sizes and fractional sizes from 1/4" to 2".
Tap drill sizes instantly
Pick the right tap drill for 75% or 50% thread engagement in decimal, fractional, and letter formats.
Clearance hole recommendations
Close, normal, and free fit clearance hole sizes so threaded holes get designed right the first time.
Head type dimensions
Reference diameter, height, and drive size for socket head, pan, flat, button, and hex heads with DIN and ANSI standards.
Gallery
Screenshots
Why Choose
Nuts & Bolts
Works offline, anywhere you need it
Complete range: metric M1-M36 and imperial #0-2"
Engineering-grade tap drill and clearance hole data