Fasteners
Thread callouts, tap drill sizes, clearance/countersink/counterbore dimensions, and Heli-Coil inserts for SAE and metric fasteners.
Open Fasteners →— Mechanical Reference Material
GD&T
Tolerance-zone diagrams and drawing callouts for the most common geometric dimensioning and tolerancing controls.
Open GD&T →Alloys
A filterable reference of common ferrous and non-ferrous alloys, with mechanical, thermal, and electrical properties.
Open Alloys →Bearings/Fits
Bearing type comparison, ISO fit selection, metric bore codes, and L10 life/lubrication basics.
Open Bearings/Fits →Springs
Spring types, common wire materials, spring index guidelines, and Belleville washer stacking.
Open Springs →Belts/Chains/Gears
V-belt and timing belt pitch standards, ANSI roller chain sizes, and gear tooth (module/diametral pitch) standards.
Open Belts/Chains/Gears →Pipe/Tube/Thread
NPS/schedule sizing, tube OD/wall gauges, and NPT/BSPP/BSPT thread standard comparison.
Open Pipe/Tube/Thread →Welding
AWS weld symbols, joint types, filler metal selection, and a welding process comparison.
Open Welding →O-Rings/Seals
AS568 O-ring sizing, material compatibility, and seal type comparison beyond O-rings.
Open O-Rings/Seals →