---
title: "TPI Lookup (based on Stud Size)"
slug: "tpi-lookup-based-on-stud-size"
tags: ["FCM"]
updated: 2026-10-27T23:12:05Z
published: 2026-10-27T23:12:05Z
canonical: "ims-handbook.cenosco.com/tpi-lookup-based-on-stud-size"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# TPI Lookup (based on Stud Size)

IMS uses the ASME B1.1 lookup tables to determine TPI (Threads per inch) from Stud Size. For better accuracy, the TPI lookup is based on a Thread series option, which can either be “Coarse” or “Fine”. Depending on the selection, IMS will use the corresponding table to look up the TPI value based on the Stud Size. By default, IMS uses the Coarse-Thread table (ASME B1.1 - Table 6).

A small portion of ASME B1.1 Tables 6 and 7 is reproduced below.

![Table  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/tpi-lookup-(based-on-stud-size)-image-62l24r6w.png?sv=2026-02-06&spr=https&st=2026-11-03T01%3A10%3A33Z&se=2026-11-03T02%3A10%3A33Z&sr=c&sp=r&sig=Bc%2BYUZBujmhmCzRMAU%2F00GYwgjT2VNCUVlxpE5WlI4o%3D)Example of ASME B1.1 Table 6 (Coarse-Thread Series).

![Table  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/tpi-lookup-(based-on-stud-size)-image-u1mzuf0v.png?sv=2026-02-06&spr=https&st=2026-11-03T01%3A10%3A33Z&se=2026-11-03T02%3A10%3A33Z&sr=c&sp=r&sig=Bc%2BYUZBujmhmCzRMAU%2F00GYwgjT2VNCUVlxpE5WlI4o%3D)Example of ASME B1.1 Table 7 (Fine-Thread Series).

> [!NOTE]
> Notes
> 
> Cenosco does not have the right to redistribute ASME Standards. If you would like to view the entire ASME B1.1 standard (including above Notes), it can be obtained directly from the ([American Society of Mechanical Engineers](https://www.asme.org/codes-standards/find-codes-standards/b1-1-unified-inch-screw-threads-un-unr-thread-form).