# Thread Chart: Tap Drill & CNC

> Thread chart, tap drill chart & CNC lathe calculators. Fast. Works offline.

Canonical page: [https://chrome-stats.com/d/com.kota.handbooklocksmith](https://chrome-stats.com/d/com.kota.handbooklocksmith)

## Overview

- **ID:** `com.kota.handbooklocksmith`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Siberian Apps
- **Category:** TOOLS
- **Downloads:** 99,163
- **Rating:** 4.11 / 5 (665 ratings)
- **Version:** 5.1.4
- **Last updated:** 2026-09-07
- **First published:** 2019-04-03
- **Publisher country:** CY
- **Size:** 22 MB
- **Data as of:** 2026-09-13
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.kota.handbooklocksmith)
- **Website:** [https://www.siberian-apps.de](https://www.siberian-apps.de/)
- **Privacy policy:** [https://docs.google.com/document/d/15bi10hsaauqrZypqbXrDEA8v9-p4MzsBaTPy155A0Qs/edit#heading=h.2m565p5df59i](https://docs.google.com/document/d/15bi10hsaauqrZypqbXrDEA8v9-p4MzsBaTPy155A0Qs/edit#heading=h.2m565p5df59i)

## Description

**Thread Chart: Tap Drill & CNC** is an offline reference and calculator app built for machinists, CNC programmers, engineers, and workshop professionals. Quickly find thread specifications, tap and clearance drill sizes, pitches, TPI, diameters, and profiles across 27 standards, including metric, UNC, UNF, BSP, NPT, ACME, API, and more.

Identify unknown threads using caliper measurements, view thread profile diagrams, and save frequently used items to Favorites. The app also includes CNC turning and milling calculators for speeds, feeds, RPM, feed rate, machining time, material removal rate, cutting power, torque, and depth of cut, plus geometry tools and engineering references for GD&T symbols, hardness, materials, Fe-C diagrams, and bearing fits.

## Rankings

- #222,051 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
- `com.kota.handbooklocksmith.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users praise the app for its comprehensive thread data, ease of use, and helpful features like profile drawings and calculators. However, multiple users highlight the need for imperial measurement units, inclusion of additional thread standards such as BSW and ANSI Unified, and improvements in data accuracy. Requests for better tapping hole size charts and English language support are also noted. Overall, the app is well-regarded but would benefit from expanded standards and measurement options.

### Pros

- Comprehensive thread information including BA specs, useful for model engineers and optical techs.
- User-friendly and helpful at the workplace, appreciated by multiple users.
- Includes thread profile drawings and a custom metric thread calculator.
- Combines multiple similar apps into one, satisfying users' needs.
- Fast and easy to use with essential thread identification information.

### Cons

- Lack of imperial measurement units and options, requested by several users.
- Missing specific thread standards like BSW (British Standard Whitworth) and ANSI Unified threads, requested by multiple users.
- Some thread data inconsistencies or inaccuracies reported (e.g., 3/8 pipe thread minor diameter).
- Requests for hole size charts and tapping hole sizes to be included or reinstated.
- Some language support issues; need for English language option.

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.kota.handbooklocksmith)