Fastener Cross-ReferenceTool
Match DIN, ISO, ASME, BS, JIS and EN fastener standards — including manufacturer part numbers — to identify the correct functional equivalent for your specification.
Hexagon Head Bolt (Full Thread / Set Screw)
Critical Dimensional Differences
Equivalent Standards
| Org | Standard | Equivalence | Status |
|---|---|---|---|
| DIN | DIN 933 | Exact Direct Equivalent | Identical |
| ISO | ISO 4017 | Superseded Standard | Superseded |
| ASME/ANSI | ASME B18.2.3.1M | Functionally Equivalent | Functional |
| ASME/ANSI | ASME B18.2.1 | Imperial Counterpart | Alternate |
| BS | BS 3692 | Functionally Equivalent | Functional |
| JIS | JIS B 1180 | Functionally Equivalent | Functional |
| EN | EN 24017 | Exact Direct Equivalent | Identical |
| IS | IS 1364 (Part 2) | Exact Direct Equivalent | Identical |
DIN 933: German standard specification (withdrawn/superseded by ISO 4017, but still widely manufactured worldwide).
ISO 4017: Direct official replacement. Notice: Width across flats (s) changed for M10, M12, M14, and M22.
ASME B18.2.3.1M: Metric Hex Cap Screws specification. Matches ISO across-flats dimensions.
ASME B18.2.1: Imperial UNC/UNF standard thread hex cap screw (inch pitch).
BS 3692: British Standard ISO metric precision hexagon bolts, screws and nuts.
JIS B 1180: Japanese Industrial Standard hexagon head bolts (Small head sizes for automotive use also exist).
EN 24017: European standard harmonization of ISO 4017.
IS 1364 (Part 2): Bureau of Indian Standards Hexagon head screws (Grade A & B).