Where every surface
is the statement.

Every marine-grade F‑head™ batch is qualified against ASTM B117 (neutral salt spray) with cross-reference to ISO 9227 NSS. Samples are held in a sealed chamber at 35 °C ± 2 °C under a continuous fog of 5% NaCl solution, pH 6.5–7.2, at a fallout rate of 1–2 mL/h per 80 cm², mounted at a 15–30° angle so solution runs off cleanly.

Salt spray is a comparative, accelerated method — not a direct service-life predictor. We report both hours-to-first-corrosion and rating grade so engineering teams can benchmark the F‑head™ against their in-spec fastener without reinventing the test.

For surgical-instrument, device, and cleanroom-equipment programs, the F‑head™ is evaluated under ISO 10993 — Biological evaluation of medical devices, the same framework used to qualify the instruments it fastens. Testing is scoped to surface-contact / limited-exposure devices and covers:

Full lot traceability from mill certificate to finished fastener. Material dossiers, test reports, and certificates of conformity are issued per lot on request for regulatory submissions (FDA 510(k), EU MDR technical files).