The NLGI consistency number or NLGI grade expresses a measure of the relative hardness of a grease used for lubrication, as specified by the standard classification of lubricating grease established by …

Mar 11, 2026 · NLGI stands for the National Lubricating Grease Institute, a professional organization that created the standard numbering system used to classify grease by its consistency, or stiffness.

Apr 20, 2026 · The NLGI grade is a well-defined, standardized parameter — measured by ASTM D217, classified by the NLGI, and incorporated into ISO 6743-9. It tells you one important thing: how stiff …

Understanding NLGI Grades can be a bit daunting to the average person. What does it mean when your grease has an NLGI Grade 00? In order to help the layman understand them, we've included a chart …

The NLGI number is a measure of the grease’s consistency as indicated by its worked penetration value of 60 strokes. The penetration test measures how deep a standard cone falls into a grease sample in …

Feb 7, 2020 · The NLGI consistency number (sometimes called “NLGI grade”) expresses a measure of the relative hardness of a grease used for lubrication. The higher the NLGI number, the firmer/thicker …

Jan 9, 2026 · The NLGI, or National Lubricating Grease Institute, is the organization responsible for creating the classification system that defines a grease’s relative hardness.

The most common grade, NLGI #2, has a peanut butter-like consistency, while NLGI #1 is softer, more like a tomato paste. While the NLGI grade doesn't measure actual viscosity, it correlates to how …

The NLGI number system categorizes greases according to their hardness, from an NLGI No. 000 through No. 6, with an NLGI No. 2 being the most common. In conjunction with several other …