Don-Jo MEST-104 Extended Lip Mortise ASA Strike – 4" x 4-7/8", 13 Gauge

Don-Jo Manufacturing's MEST-104 is a heavy-duty extended lip mortise ASA strike engineered for commercial and institutional doors fitted with mortise locksets. Constructed from non-ferrous material at a robust 13 gauge (.095"), this strike provides a substantial mounting platform and a full 4-7/8" face height with a 4" lip measured from the center of the screw hole to the end of the lip — the critical dimension specifiers need when matching a mortise strike to deep frame preparations or offset door conditions. The single latch hole accepts standard mortise latch projections, keeping alignment straightforward during installation. Available in three finish options — 630 Satin Stainless Steel (US32D), Duranodic Dark Bronze (Don-Jo DU), and 622 / US19 Flat Black — the MEST-104 coordinates with the finish schedules common on commercial storefront, healthcare, education, and multi-family projects. This is a true extended lip ASA strike; it is not a latch protector, latch guard, remodeler plate, or scar plate.

MEST-104 Extended Lip Mortise Strike – Key Features

• Extended Lip Geometry: 4" lip (center of screw hole to lip end) accommodates deep frame rabbets and setbacks common in commercial mortise applications, eliminating the need for custom fabrication.
• Heavy 13 Gauge (.095") Construction: Non-ferrous material at 13 ga. delivers the rigidity expected in high-cycle commercial door openings, maintaining alignment over long service life.
• Mortise ASA Strike Profile: Sized to a 4-7/8" height and designed specifically for mortise lockset preparations — a direct specification match where a standard ASA-format mortise strike is called out.
• Single Latch Hole: One latch opening keeps the strike properly positioned for mortise latch projections without excess cutouts that can weaken the strike box area.
• Three Commercial Finish Options: Satin Stainless (630/US32D), Duranodic Dark Bronze (DU), and Flat Black (622/US19) allow the strike to blend into virtually any door hardware finish schedule without special-order upcharges.
• Don-Jo Quality, Shelf-Pack Ready: Packaged in shelf packs of 5, supporting contractor and distributor stocking for project quantities.

Technical Details

How to Specify / Order

Order by model number and finish designation: MEST-104-630 (Satin Stainless Steel), MEST-104-DU (Duranodic Dark Bronze), or MEST-104-622 (Flat Black). This item is non-stock and ships direct from Don-Jo; allow 3–10 business days for fulfillment. Confirm the 4" lip dimension against your frame preparation before ordering — the lip measurement is taken from the center of the screw hole to the end of the lip, which is the standard Don-Jo callout for MEST-series strikes.

Ordering & Lead Time

Non-stock, ships from Don-Jo. Lead time: 3-10 business days.