The designation of a screw thread gives the thread symbol, the nominal size, the pitch, and the thread tolerance class (Ex: M6 x 1 - 5H6H). In internal thread tolerance class designation, the pitch diameter tolerance is followed by minor diameter tolerance.

The following table chart are standard metric internal thread sizes M 0.25 - M 8 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard internal threads. Do not use these values for …

The metric M profile threads of tolerance class 6H/6g are intended for metric applications where the inch class 2A/2B have been used. At the minimum material limits, the 6H/6g results in a looser fit than the 2A/2B.

(a) Example of internal thread M Profile : M6 x 1 – 5H6H. If the tolerance class for Pitch diameter and Minor diameter are identical, it is not necessary to repeat the symbols. For example : M6 x 1 – 6H6H should become M6 x 1 – 6H. (b) Example of external thread M Profile : M6 x 1 – 4g6g.

2024年7月1日 · The 6H tolerance ensures that internal threads in engine blocks or transmission housings fit perfectly with the external threads of Hexagon bolts or Flanged Hex bolts, providing a secure and reliable connection.

2024年4月3日 · m10-6h是一公制内螺纹，m10是螺纹大径，螺距是标准的1.5, 6h是螺纹公差等级，一般没螺纹左后是字母表示为大写的“h”，外螺纹是小写的了。 m是螺纹代号， 一般螺纹按螺距可分为：粗牙和 细牙螺纹 两种。 m10：公称直径为10的 粗牙螺纹 。

M6 : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more

2023年12月8日 · 6代表有个m6的螺纹,6h内螺纹精度等级,6h:螺纹精度,指螺纹中径公差;深9:螺纹有效深度;孔深15: 螺纹底孔深度。 m6-6h的意思是:这是一个螺丝的标示型号，意思是M6内螺纹，大径基本尺寸是6，螺距是1，公差等级6H。

Metric Internal Thread Chart — Limiting Dimensions for M Profile: Thread Designation: Pitch, p: Tolerance Class: Minor Dia., D1

Charts for the allowed range of pitch, major and minor diameters for classes 6H and 6g. The values are calculated from the definitions of ISO 965-1. They have limited use since they provide data only for the default classes.