# Hague Screw Thread Calculator > Calculates dimensions for Unified, Whitworth, ISO Metric, and custom screw threads. (iPhone/iPad app by Hague Fasteners Ltd.) - Source: https://appshunter.io/ios/app/hague-screw-thread-calculator/id853369162 (this page in markdown: same URL + `.md`) - Developer: [Hague Fasteners Ltd](https://appshunter.io/developer/853369165) - Category: Utilities, Business - Price: Free - Rating: 4.00/5 from 5 App Store ratings · 29 written reviews indexed - Age rating: 4+ - Requires: iOS 14.4 · 6 MB - Languages: American English - Released: 2014-04-08 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hague-screw-thread-calculator/id853369162/reviews.md ## What is Hague Screw Thread Calculator? Throw away those Thread Data Tables and Screw Thread books as Hague Fasteners bring you the perfect Engineers Thread Companion. Now you can see all the data you need for Unified & Whitworth Imperial Screw Threads along with ISO Metric and Custom threads. This handy calculator shows all the data you need for Standard UNC, UNF, UNEF, BSW, BSF, Metric Coarse & Metric Fine along with the facility to create any non standard custom thread size / thread pitch combination to see all the critical nominal dimensions. Hague Fasteners are not responsible for any technical errors or typographical errors in this calculator. All critical data should be checked and verified against the relevant International Standard prior to use. ## Key features - Unified screw thread data - Whitworth screw thread data - ISO Metric screw thread data - Custom thread calculator - Critical nominal dimensions ## Recent user reviews (10 of 29) All indexed reviews: https://appshunter.io/ios/app/hague-screw-thread-calculator/id853369162/reviews.md ### 5/5 — Small Imperial sizes missing *2023-02-10, version 3.1* Needed dimensions of UNF 10-32 (3/16”) but app’s smallest SAE size is 1/4”. ### 5/5 — Excellent go-to app for thread data *2021-10-18, version 3.1* This is the app I reach for when designing and cutting screw threads. It cover a wide range of standard metric coarse, fine and non-standard combinations. On the odd occasion I make Unified threads this app has been good for these too. Has replaced Zeus etc. tables for me. ### 5/5 — Great App *2021-08-25, version 3.1* Amazing app to use. No better place to check the size of the bolts to fit my nuts. There’s nowhere else I’d go for a good quality screw ### 5/5 — Updated review after update *2021-08-25, version 3.1* Thanks Hague. Works a treat, good to have the app working on my phone again. ### 5/5 — Great Update *2021-08-24, version 3.1* Works so much better since update, great for thread calculations. ### 5/5 — Brilliant app *2021-08-22, version 3.1* Quicker and better than the old Zeus books any thread info found quickly at fingertips. If you work with threads in anyway you need this app ### 5/5 — Thanks for the Update! *2021-08-21, version 3.1* Ronseal off apps! Does exactly what it says on the tin! The latest update has removed all the bugs too. ### 5/5 — Easy Solutions *2021-08-21, version 3.1* I’ve found this app by accident it’s so quick and easy to use. Covering all the main thread forms with all details easy to read. Since I started using the calculator, I contacted Hague Fasteners UK and was pleasantly surprised by the professional levels of knowledge, service and delivery across the range. 5* performance all round. ### 1/5 — Does not work *2021-08-15, version 2.1* Was a great app. Has not been updated for 7 years so does not work on 2021 IOS ### 2/5 — Stopped working *2021-07-25, version 2.1* Well it was really good while it lasted. Unfortunately it’s not been updated, so it’s no longer working, mores the pity ## Frequently asked questions about Hague Screw Thread Calculator ### What does the Hague Screw Thread Calculator do? This application serves as a digital replacement for physical thread data tables and books. It provides engineers with all the necessary data for Unified & Whitworth Imperial Screw Threads, as well as ISO Metric and custom threads. ### What types of screw threads can this app calculate? The calculator supports standard UNC, UNF, UNEF, BSW, BSF, Metric Coarse, and Metric Fine threads. It also offers the flexibility to create and calculate data for any non-standard custom thread size and pitch combination. ### Is this app free to use? Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, indicating a completely free utility for users. ### Who would benefit from using this app? This app is ideal for engineers, machinists, and hobbyists who frequently work with screw threads. It simplifies the process of finding critical dimensions and eliminates the need to carry or consult bulky reference materials. ### What are the limitations of this calculator? The developers state that they are not responsible for any technical or typographical errors. It is recommended that all critical data be checked and verified against the relevant International Standard prior to use. ## Version history (last 5 releases) ### 3.1 — 2021-08-21 Resolved an issue with Tap Drill Calculations in some instances. Resolved the issue with BS calculations. ### 3.0 — 2021-08-15 Optimised for more devices. Sharp new look! ### 2.1 — 2014-08-13 Optimized for more iOS devices! Improved transparent look and design tweaks. Hague Fasteners brochure available to view in the About Page. ### 2.0 — 2014-06-05 This major v2.0 update brings full diameter / pitch combination selection across Metric, Unified and Whitworth thread forms. Now the custom dual scroll wheel gives total functionality for all preferred, non-preferred and custom thread forms. You can now quickly identify 1st, 2nd & 3rd choice thread pitches for each diameter and see the relevant data. The Hague Screw Thread Calculator will now allow you to select custom pitches beyond Coarse, Fine & Extra Fine. Also the app now calculates and displays the tapping drill size (mm) for every calculated thread across all Metric & Imperial thread forms. We welcome any further requests and recommendations you would like seen implemented in any future updates. ### 1.1 — 2014-04-15 Bug fixes. ## Apps similar to Hague Screw Thread Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [CNC Lathe calculator](https://appshunter.io/ios/app/cnc-lathe-calculator/id1485500283) | 5.0 (4) | $4.99 | Utilities | | [Camcut](https://appshunter.io/ios/app/camcut/id1357061479) | — | Free | Utilities | | [Bolt Reader®](https://appshunter.io/ios/app/bolt-reader/id1554066006) | 5.0 (6) | Free | Utilities | | [M.A. Ford Machining Calculator](https://appshunter.io/ios/app/ma-ford-machining-calculator/id1554634640) | 4.8 (39) | Free | Utilities | | [Renishaw GoProbe](https://appshunter.io/ios/app/renishaw-goprobe/id943016057) | 4.2 (6) | Free | Utilities | | [Mechanical Engineering Toolkit](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443) | 4.8 (50) | Free | Utilities | ## Related topics [hague screw thread calculator](https://appshunter.io/ios/topics/hague-screw-thread-calculator) · [hague fasteners ltd](https://appshunter.io/ios/topics/hague-fasteners-ltd) · [thread the bolt](https://appshunter.io/ios/topics/thread-the-bolt) · [thread hole](https://appshunter.io/ios/topics/thread-hole) · [thread pop](https://appshunter.io/ios/topics/thread-pop) · [threader pro](https://appshunter.io/ios/topics/threader-pro) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*