I need a dependable supplier for HU100 wafer/spring packs with tight tolerances (target ±0.02 mm) to eliminate stick-slip after rekeying — my last set caused two comebacks on a 2014 Chevrolet Cruze. If you’ve got an OEM-spec source that holds dimension and temper, please share; I’m aiming for smooth plug rotation without over-polishing or altering wafer profile.
Strattec HU100 wafer/spring kits met ‘±0.02 mm’ here on 2014 Cruze; avoid mixed springs — temper varies. strattec.com.
@OP I’ve had the best luck with ASP HU100 wafer/spring packs from American Key Supply; two Cruze cores mic’d inside your ‘±0.02 mm’ and the stick-slip vanished when I switched to a dry PTFE film instead of grease. Caveat: toss any wafer with a visible plating seam and, if you need to clean it up, touch only the side edges — not the bearing face.
With the ‘slight yellowing’ at 40/75, run a quick DVS on core and coat and map the curve to container MVTR (USP <671>) to justify a foil blister + desiccant or HDPE with an O2 scavenger — think of it like matching a raincoat to the storm. For documenting/triage, lift Q1E’s trending format (lot, condition, delta, hypothesis, CAPA) and link in preform/excipient compatibility; solid starter refs: ICH Q1A/Q1E at ICH Official web site : ICH. Small caveat: if lactose is present, rule out Maillard before blaming coating pigments.
I’ve had the best consistency using GM-bagged service packs (ACDelco/Strattec) from gmpartsdirect.com; the lots have been uniform on Cruze cores. If it still drags, Sharpie the sidebar track and rotate — when you see the witness line, lightly break the plug slot edge, not the tumbler. It’s pricier and ships slower, but it’s saved me re-do’s.
I started sending a one-pager before kickoff with a simple grid — ‘aggregate ≠ family plan’ — and a short claim example that walks deductible → attachment → aggregate; it cut clarifying questions in half. If eyes still glaze, I bring a 12-month claims cash-flow strip chart; do you pre-send anything similar?