STAINLESS STEEL POZI FLANGED POLYFIX 45

Pozi Flanged Polyfix 45 — The flanged head on this screw functions as a built-in washer, spreading clamping load over a wider area than a plain pan head — valuable wherever the plastic is soft, thin, or prone to marking under concentrated pressure — while the Polyfix 45 thread underneath forms its own mating thread in a pilot hole suited to boss and hole-tolerance combinations that don't engage as well with the more general Polytech 30 profile. It's the natural choice where a design already calls for Polyfix 45 and also needs the load-spreading benefit of a flange, such as softer thermoplastic enclosures, thin-walled covers, or components where a separate flat washer would otherwise be fitted alongside a plain pan or countersunk screw. Because the flange is integral, it removes one loose part from the assembly, which is a small but real benefit on manually built runs where a missing or dropped washer can hold up production. Pozidriv's cross-recess offers reasonable cam-out resistance for hand or moderate-torque powered driving; where the assembly runs on higher-torque or automated equipment, the hexalobular alternatives elsewhere in the Polyfix 45 range are generally a more reliable choice. As with other Polyfix 45 screws, this thread profile is usually specified because trial fitting or supplier guidance has identified it as the better match for a specific plastic and boss combination — Polytech 30 remains the wider-purpose range for new designs generally, with Polyfix 45 brought in for the cases that need it. There's no dedicated ISO or DIN standard for the Polyfix 45 thread form itself, since it's a purpose-built profile for plastic assembly, though the flanged pan head follows the same general built-in-washer geometry used on flanged screws elsewhere in PTS's range. Grade choice follows the environmental logic used across the whole category: A2 (304-equivalent) is the sensible, economical default for indoor enclosure and appliance assembly, while A4 (316-equivalent) is worth the modest extra cost for outdoor, marine, or washdown products, where a corroding head could eventually mark or weaken the plastic around the fixing point.

FAQs
Does the flange affect the pilot hole size needed for Polyfix 45?
No — the flange only changes the bearing area under the head; pilot hole sizing follows the same Polyfix 45 thread requirements as the equivalent plain pan or countersunk screw in this range.

Is this screw interchangeable with the Pozi Flanged Polytech 30?
Not without checking first — the flange and head are similar, but the two thread ranges engage the plastic differently, so a substitution should be trial-fitted or confirmed against the original design rather than assumed to be equivalent.

When is a flanged Polyfix 45 screw the right call instead of a plain pan Polyfix 45?
When trial assembly with the plain pan version shows the plastic marking, dimpling, or stress-whitening around the fixing point — the flange spreads that load over a wider area and usually resolves it without changing the plastic or boss design.

Should I choose Pozidriv or hexalobular for this flanged screw?
Pozidriv is generally adequate for hand or moderate-torque powered assembly; hexalobular options elsewhere in the Polyfix 45 range are the better choice where higher, more consistent clamping torque or automated driving is required.