Practical guides for importers, traders, and procurement engineers. No filler — just the spec knowledge that prevents costly mistakes.
Drawing Interpretation · 8 min
TPI vs metric pitch, Point Blank angle, Head Length vs Grip Length, double-lead threads, and self-tapping vs machine screws. The five fields that turn a right drawing into a wrong order.
Supplier Evaluation · 7 min
Five checkpoints — thread spec, strength grade, surface finish, length basis, certifications — and two comparison tables that tell you immediately if a quote is apples-to-apples.
Quality & Compliance · 7 min
Each document proves something different. Substituting one for another is how disputes happen. Six fields to check on every MTR, and when a CoC alone is not enough.
Thread Standards · 8 min
M6 ≠ 1/4-20. M8 ≠ 5/16-18. The thread angles are the same (60°), which is why it starts to engage — but the pitch mismatch is why it strips. Full comparison table for 7 size pairs.
Procurement · 9 min
Five fields left blank cause 90% of quote inaccuracies. Exact language for thread spec, material grade, surface finish, length basis, and certifications — with a ready-to-use template.
Written by Wilson Hsieh, founder of ScrewGenius and a fastener specification engineer with 10+ years of experience in thread die development and AI-assisted drawing interpretation. These guides are based on real procurement mistakes — patterns we see repeated across thousands of customer drawings every year.
Every article in this series describes a problem that can be caught in seconds when a drawing is parsed by AI instead of read by hand. ScrewGenius extracts thread specs, material grades, surface finish callouts, and length dimensions directly from uploaded drawings — and flags the ambiguities that cause expensive misquotes.
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