STAINLESS STEEL HEXAGON THIN NUTS DIN 936

Hexagon Thin Nuts DIN 936 — DIN 936 is one of two long-standing German standards for the hexagon thin nut, and its main practical value is as a precise dimensional reference: where a drawing or legacy assembly specifies DIN 936 by number, sourcing a nut that actually meets that spec — rather than a visually similar thin nut to a different standard — matters for fit and for passing QA-controlled procurement checks. Mechanically it does the same job as any hexagon thin nut: run down against a full nut as a jam or lock nut, or fitted alone in low-load, clearance-restricted positions, such as securing brackets or panels where a full-height nut would foul surrounding components. DIN 936 has largely been superseded in current design work by DIN 439 and the international ISO 4035, both of which are more commonly specified on new drawings; DIN 936 is mostly still encountered when servicing or replacing parts on older equipment built to the original specification. For that reason, when a DIN 936 nut needs replacing, checking whether the design can be updated to DIN 439/ISO 4035, or whether the original standard must be matched exactly, is worth doing before ordering, since chamfer and crown height details differ slightly between the standards even though they look interchangeable at a glance. A2 stainless is adequate for most jam-nut duty; A4 is worth the modest extra cost wherever the assembly is outdoors, washed down, or in a marine setting, since a nut left in place for years is exactly the kind of component where slow corrosion eventually becomes a maintenance headache. Thread size and pitch must match the mating bolt or stud precisely, with coarse pitch as the default unless the original design specifies fine thread.

FAQs
Is DIN 936 still specified for new designs?
Rarely — DIN 439 and ISO 4035 are the current standards most commonly called up on new drawings, so DIN 936 is mostly encountered when servicing existing equipment that was originally built to it.

What should I check before substituting DIN 936 with DIN 439 or ISO 4035?
For non-critical, general jam-nut duty the three are close enough to be used interchangeably, but for a safety-critical or precision replacement, compare crown height and chamfer against the original part rather than assuming a match based on nominal size alone.

What material is recommended for a DIN 936 nut left in place long-term?
A4 stainless is worth the modest extra cost for any nut that will remain outdoors, washed down, or in a marine setting for years, since slow pitting corrosion on A2 in that kind of exposure is a common reason these nuts eventually need replacing.

Are DIN 936 nuts self-locking?
No, DIN 936 is a plain thin nut with no locking feature. It relies on being jammed against another nut or component to resist loosening.