Specification summary of ISO 8434-2 as applied to jic 37-degree flare fittings: the dimensions the standard fixes, the full size range supplied, and the related designations commonly cross-referenced.
ISO 8434-2 — Scope
The table below lists the dimensions catalogued for jic 37-degree flare fittings under ISO 8434-2. The scope of ISO 8434-2 itself is not summarised here — where a figure matters, confirm it against the published document.
Tolerance & Product Grades
Product grade is a concept from dimensional fastener standards and does not apply to ISO 8434-2. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by ISO 8434-2
| Dash size | Tube outside diameter | Thread (UNF) | Cone angle |
|---|---|---|---|
| -04 | 1/4 in | 7/16-20 | 37 degrees |
| -05 | 5/16 in | 1/2-20 | 37 degrees |
| -06 | 3/8 in | 9/16-18 | 37 degrees |
| -08 | 1/2 in | 3/4-16 | 37 degrees |
| -10 | 5/8 in | 7/8-14 | 37 degrees |
| -12 | 3/4 in | 1-1/16-12 | 37 degrees |
| -16 | 1 in | 1-5/16-12 | 37 degrees |
| -20 | 1-1/4 in | 1-5/8-12 | 37 degrees |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent JIC 37-Degree Flare Fittings page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
A complete specification for jic 37-degree flare fittings normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. ISO 8434-2 is one of them, not all of them.
Custom manufacturing · Made to drawing
Need a pipe & pneumatic fitting to this standard in a non-standard size?
Parts built to ISO 8434 2 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
