7/8 fields identicalno dimensional differences

DIN 7991 vs ISO 10642

Within this database the two standards list identical nominal dimensions for every overlapping size, so they are interchangeable for most purchasing purposes. Tolerances, marking requirements and material specifications are defined separately by each standard body and should still be checked.

Specification comparison

SpecificationDIN 7991ISO 10642Verdict
Standard bodyDINISOdiffers
TitleHexagon Socket Countersunk Head ScrewHexagon Socket Countersunk Head Screwidentical
Fastener typeSocket countersunk head screwSocket countersunk head screwidentical
Head typeCountersunk head (90°)Countersunk head (90°)identical
DriveHexagon socketHexagon socketidentical
Size rangeM3 – M20M3 – M20identical
Number of listed sizes1111identical
Thread standard length definedYesYesidentical

Dimension differences by sizecomputed from the tables in this database

SizeDifference in this database
M3identical across listed dimensions
M4identical across listed dimensions
M5identical across listed dimensions
M6identical across listed dimensions
M8identical across listed dimensions
M10identical across listed dimensions
M12identical across listed dimensions
M14identical across listed dimensions
M16identical across listed dimensions
M18identical across listed dimensions
M20identical across listed dimensions

Rows shaded amber differ between the two standards. Substitution should be checked against the affected sizes rather than assumed from the equivalence alone.

Full dimension tables

Standard ADIN 7991Hexagon Socket Countersunk Head ScrewStandard BISO 10642Hexagon Socket Countersunk Head Screw

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