ASME B18.2.1 HEX BOLT — Advanced Rule Matrix

BOLTS · Cross-reference compatibility analysis for material, finish & size combinations

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🔬 ESE Substitution Evaluation

Engineering Substitution Engine — Evaluate the feasibility of replacing ASME B18.2.1 with an alternative standard.

Running ESE Pipeline (L0–L3)...

Attribute Comparison

Triggered Risks

    Pipeline Trace

    Cross-Rule Compatibility Matrix

    Compatibility between sizes, material grades, and surface finishes under ASME B18.2.1.

    Size Material / Grade Surface Finish Compatibility Notes
    1/4Grade 8HDG✅ CompatibleStandard combination
    1/4Grade 8Plain✅ CompatibleStandard combination
    1/4Grade 5Zinc✅ CompatibleStandard combination
    1/4Grade 5HDG✅ CompatibleStandard combination
    1/4Grade 5Plain✅ CompatibleStandard combination
    1/4Grade 8Zinc✅ CompatibleStandard combination
    5/16Grade 5Zinc✅ CompatibleStandard combination
    5/16Grade 5HDG✅ CompatibleStandard combination
    5/16Grade 5Plain✅ CompatibleStandard combination
    5/16Grade 8Zinc✅ CompatibleStandard combination
    5/16Grade 8HDG✅ CompatibleStandard combination
    5/16Grade 8Plain✅ CompatibleStandard combination
    3/8Grade 5Plain✅ CompatibleStandard combination
    3/8Grade 8Zinc✅ CompatibleStandard combination
    3/8Grade 8HDG✅ CompatibleStandard combination
    3/8Grade 8Plain✅ CompatibleStandard combination
    3/8Grade 5Zinc✅ CompatibleStandard combination
    3/8Grade 5HDG✅ CompatibleStandard combination
    7/16Grade 8Zinc✅ CompatibleStandard combination
    7/16Grade 8HDG✅ CompatibleStandard combination
    7/16Grade 8Plain✅ CompatibleStandard combination
    7/16Grade 5Zinc✅ CompatibleStandard combination
    7/16Grade 5HDG✅ CompatibleStandard combination
    7/16Grade 5Plain✅ CompatibleStandard combination
    1/2Grade 8Zinc✅ CompatibleStandard combination
    1/2Grade 8HDG✅ CompatibleStandard combination
    1/2Grade 8Plain✅ CompatibleStandard combination
    1/2Grade 5HDG✅ CompatibleStandard combination
    1/2Grade 5Zinc✅ CompatibleStandard combination
    1/2Grade 5Plain✅ CompatibleStandard combination
    9/16Grade 5Zinc✅ CompatibleStandard combination
    9/16Grade 5HDG✅ CompatibleStandard combination
    9/16Grade 8Zinc✅ CompatibleStandard combination
    9/16Grade 8HDG✅ CompatibleStandard combination
    9/16Grade 5Plain✅ CompatibleStandard combination
    9/16Grade 8Plain✅ CompatibleStandard combination
    5/8Grade 5Zinc✅ CompatibleStandard combination
    5/8Grade 5HDG✅ CompatibleStandard combination
    5/8Grade 5Plain✅ CompatibleStandard combination
    5/8Grade 8Zinc✅ CompatibleStandard combination
    5/8Grade 8HDG✅ CompatibleStandard combination
    5/8Grade 8Plain✅ CompatibleStandard combination
    3/4Grade 5Zinc✅ CompatibleStandard combination
    3/4Grade 5HDG✅ CompatibleStandard combination
    3/4Grade 5Plain✅ CompatibleStandard combination
    3/4Grade 8Zinc✅ CompatibleStandard combination
    3/4Grade 8HDG✅ CompatibleStandard combination
    3/4Grade 8Plain✅ CompatibleStandard combination
    7/8Grade 8Plain✅ CompatibleStandard combination
    7/8Grade 5Zinc✅ CompatibleStandard combination
    7/8Grade 5HDG✅ CompatibleStandard combination
    7/8Grade 5Plain✅ CompatibleStandard combination
    7/8Grade 8Zinc✅ CompatibleStandard combination
    7/8Grade 8HDG✅ CompatibleStandard combination
    1-1/8Grade 5Plain✅ CompatibleStandard combination
    1-1/4Grade 5Plain✅ CompatibleStandard combination
    1-1/8Grade 8Zinc✅ CompatibleStandard combination
    1-1/8Grade 8HDG✅ CompatibleStandard combination
    1-1/4Grade 8Zinc✅ CompatibleStandard combination
    1-1/8Grade 8Plain✅ CompatibleStandard combination
    1-1/4Grade 8HDG✅ CompatibleStandard combination
    1-1/4Grade 8Plain✅ CompatibleStandard combination
    1-1/8Grade 5Zinc✅ CompatibleStandard combination
    1-1/8Grade 5HDG✅ CompatibleStandard combination
    1-1/4Grade 5Zinc✅ CompatibleStandard combination
    1-1/4Grade 5HDG✅ CompatibleStandard combination

    Related Standards & Academic References

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    Standard References: Official ASME standards · ASME B18.2.1 reference (fasteners.eu)

    ASME B18.2.1 Hexagon Head Bolt per ASME B18.2.1 specification, available in Grade 5 grade with Plain finish. Engineered for industrial OEM applications requiring 827.0 MPa tensile strength and reliable long-term fastening performance.