STAINLESS STEEL NYLON INSERT NON SERRATED FLANGE NUTS DIN 6926

Nylon Insert Non Serrated Flange Nuts DIN 6926 — This is the smooth-underside version of DIN 6926: the same nylon collar inside the nut body providing prevailing-torque resistance to loosening, and the same integral flange spreading clamp load over a wider bearing area than a plain hex nut, but without the serrations that bite into the mating surface. Dropping the serration doesn't compromise the locking performance at all, since the nylon insert's grip on the bolt thread works entirely independently of the flange's underside profile — what it does is protect the mating surface from marking, which matters wherever the nut sits against a painted, plated, powder-coated, or otherwise finished face that needs to stay cosmetically intact after assembly. Typical applications include automotive body panels, appliance housings, and any visible or coated assembly where a serrated flange's bite would be a defect rather than a feature, while still needing genuine vibration resistance from the nylon lock rather than relying on flange friction alone. Where the mating surface isn't a concern and maximum anti-rotation performance is wanted, the serrated DIN 6926 adds the surface bite as a second, independent locking mechanism on top of the nylon. As with all nylon insert nuts, this one can be reused a limited number of times before the polymer's grip weakens with repeated removal and refitting, so safety-critical joints should get a fresh nut after disassembly rather than the same one refitted repeatedly, and the usual nylon temperature ceiling applies — an all-metal locking flange nut should be used instead in hot environments. A2 stainless covers most general and appliance-grade applications; A4 is worth specifying for outdoor, marine, or washdown use. Thread size and pitch must match the mating bolt exactly, with flange dimensions scaling to nominal size in the usual way.

FAQs
Does dropping the serrations weaken the anti-vibration performance at all?
No, the locking action comes entirely from the nylon insert gripping the bolt thread, which functions independently of the flange surface. Removing the serrations only affects surface grip, not thread-locking performance.

Is this the right choice for a painted or powder-coated panel?
Yes, this is exactly the situation it's designed for — full nylon locking performance without any surface marking, unlike the serrated version which will scuff a coated finish at the contact point.

Are these nuts reusable?
They can be reused a limited number of times, but nylon locking performance reduces with each reuse; safety-critical assemblies should use a new nut after removal.

Is this nut suitable for high temperature service?
No, the nylon insert has the same temperature limitation found in all nyloc-type nuts. An all-metal locking flange nut should be used in high-heat environments.