News & insight

Choose passivation when you need improved surface cleanliness or corrosion resistance of 316 stainless steel. Choose Xylan when you need a low‑friction, anti‑galling surface or a consistent black aesthetic.

Potentially, yes. Coatings such as TnT systems or Xylan influence friction levels, so torque values or assembly behaviour may differ from standard finishes. We can advise where torque‑controlled assembly is important.

Compatibility depends on the geometry of the fixing and the coating‑process limitations (e.g. residue traps, tumbling witness marks). Get in touch with us for advice on compatibility.

No. The 500‑piece minimum applies per product type. Mixed configurations cannot be combined to meet the threshold.

No. Alternative finishes and coatings only modify surface‑level properties such as friction, corrosion resistance, or appearance. They do not increase the mechanical strength of the fastener.

Possibly. The lock nut design has different height and thread engagement lengths, so you may need a slightly longer screw to ensure proper engagement with the locking feature.

M6, M8, M10, and M12 only. M4 and M5 are unavailable through this route due to our product manufacturing limitations. Contact us to ask about alternative options for M4 or M5 thread sizes.

Prevailing–torque lock nuts introduce additional friction via a mechanical locking feature, increasing the running torque required during assembly.

Yes. The lock nut design uses different geometry, and the associated WLL and tightening torque values are not the same as standard products. We can supply the correct values for your specification on request.

It replaces the standard F1/SF1 nut with a prevailing–torque lock nut, which incorporates a stainless steel locking element that resists rotation under vibration.