For grease nipples (din 71412), ISO 6392 is the governing document for the dimensions listed below. Mechanical and performance requirements for this part family are set by its own standards, not by the bolt and screw property-class documents.
ISO 6392 — Scope
The table below lists the dimensions catalogued for grease nipples (din 71412) under ISO 6392. The scope of ISO 6392 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 6392. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by ISO 6392
| Thread | Head angle | Form | Notes |
|---|---|---|---|
| M6 x 1.0 | straight (form A) | DIN 71412 A | commonest small nipple |
| M8 x 1.0 | straight (form A) | DIN 71412 A | general machinery |
| M8 x 1.25 | straight (form A) | DIN 71412 A | general machinery |
| M10 x 1.0 | straight (form A) | DIN 71412 A | general machinery |
| M10 x 1.0 | 45 degrees (form B) | DIN 71412 B | where a straight gun will not reach |
| M10 x 1.0 | 90 degrees (form C) | DIN 71412 C | tight or shrouded positions |
| R 1/8 in | straight (form A) | DIN 71412 A | tapered pipe thread |
| R 1/4 in | straight (form A) | DIN 71412 A | tapered pipe thread |
| 1/4-28 UNF | straight | inch series | imported and automotive equipment |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Grease Nipples (DIN 71412) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify ISO 6392
Choose ISO 6392 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for grease nipples (din 71412).
Custom manufacturing · Made to drawing
Need a pipe & pneumatic fitting to this standard in a non-standard size?
Parts built to ISO 6392 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.
