CompareOpen in Google PlayApp info
- Installs
- 10+
- Category
- Tools
- Content rating
- Everyone
- Version
- 1.6.0
- Released
- Sep 11, 2026
- Last updated
- 6 Oct 2026
- In-app purchases
- Yes
- Contains ads
- No
- In-app price range
- $2.99 per item
- Promo video
- No
- Requires Android
- 7.0
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What's newin version 1.6.0
Big reference update: • Metric threads: full GOST 24705 range, M0.25 to M600 (488 sizes), coarse pitch marked • Pipe threads G, R, Rc: all sizes from 1/16 to 6 • Trapezoidal: 222 single-start and 533 multi-start threads with lead and number of starts • Buttress: 218 sizes • Equivalent standards (ISO, DIN, BS, JIS) in details and filters • Root diameter d3 added • Clearer drawings for fine pitch on large diameters • "Back to top" button in the catalog
About this app
Thread reference: metric & imperial, identify by size, tightening torque.
Read full description
ThreadSpec is a fast, offline reference for screw threads — for engineers, machinists, toolmakers, and DIY. Identify and match metric and imperial threads: ISO, DIN, UNC/UNF, BSP/G. • Thread identifier by measurements (diameter, pitch, profile angle) — ranked matches. • Catalog of metric and imperial threads with filters by system and standard. • Key dimensions: diameters, pitch, tap drill, tolerances. • Clear axial-section drawing of each thread. • Engineering tools (Pro): tightening torque, bolt preload and minimum thread engagement for the chosen property class and nut material. • Favorites, millimeters/inches, light/dark themes, English/Russian. Works offline. No ads, no tracking, no accounts.