Geometric tolerancing basics The condition of a feature when it contains the least amount of material (for example, the largest hole or the smallest shaft) is referred to as which graduation of material condition?

Introduction / Context:
Material condition modifiers are central in dimensioning and tolerancing. Understanding the difference between Maximum Material Condition (MMC) and Least Material Condition (LMC) helps in clearance analysis, gaging, and functional tolerancing decisions.

Given Data / Assumptions:

• A feature of size (hole or shaft) varies within stated limits.
• Least material means the feature contains the minimal amount of material consistent with its limits.
• We must name this condition correctly.

Concept / Approach:
For an internal feature (hole), least material occurs at the largest size. For an external feature (shaft), least material occurs at the smallest size. This condition is called LMC and is used for certain gaging schemes and tolerance analyses where minimum thickness or minimum strength might be critical.

Step-by-Step Solution:

Verification / Alternative check:
Check against MMC: for holes, MMC is smallest diameter; for shafts, MMC is largest diameter. LMC is the opposite condition. Ensure consistency in tolerance calculations.

Why Other Options Are Wrong:

• MMC: This is Maximum Material Condition, not least.
• Smallest / actual size: Informal or ambiguous terms; GD&T requires the precise modifier LMC.

Common Pitfalls:
Confusing internal vs external features when deciding which limit corresponds to least material. Always think in terms of material volume in the finished part.

Final Answer:
LMC