Don-Jo MEST-175 Extended Lip Mortise ASA Strike

The Don-Jo MEST-175 is an extended lip mortise ASA strike engineered for commercial and institutional door frames where a standard short-lip strike will not provide adequate latch engagement or frame coverage. Manufactured by Don-Jo Manufacturing, this mortise strike measures 1-3/4" wide by 4-7/8" tall, with the 1-3/4" lip dimension taken from the center of the screw hole to the end of the lip — the measurement that matters when matching frame depth and door backset. Formed from non-ferrous material at 13 ga. (.095), the MEST-175 delivers the thickness and durability specifiers expect in a commercial-grade mortise strike application. It is offered in three finishes to coordinate with door hardware sets: 630 satin stainless steel (US32D), Duranodic dark bronze (Don-Jo DU), and 622 / US19 flat black — making it a practical choice for stainless, dark bronze, or matte black hardware packages alike. With a single latch hole and a classic ASA strike footprint in an extended lip mortise profile, the MEST-175 is the correct replacement or new-construction strike wherever a mortise-format, extended-lip ASA strike is called out in a door hardware schedule.

MEST-175 Extended Lip Mortise Strike — Key Features

• Extended Lip Mortise Profile: 4-7/8" face height in a mortise ASA strike format accommodates deeper frame rabbets and provides greater latch security than short-lip alternatives.
• Precise Lip Measurement: The 1-3/4" width is measured from the center of the screw hole to the end of the lip, ensuring accurate frame preparation and proper latch engagement alignment.
• Heavy 13 ga. (.095) Construction: Non-ferrous material formed at 13-gauge thickness delivers commercial-grade durability suitable for high-traffic institutional and commercial openings.
• Single Latch Hole: One latch hole configuration is consistent with standard mortise lock bolt geometry, simplifying specification for most commercial mortise locksets.
• Three Finish Options: Available in 630 satin stainless steel (US32D), Duranodic dark bronze (Don-Jo DU), and 622 / US19 flat black to integrate cleanly with a wide range of architectural hardware finishes.
• Convenient Shelf Pack: Packaged five units per shelf pack, making it practical for contractors and distributors stocking multiple openings.

Technical Details

How to Specify / Order

Order the MEST-175 by specifying the model number and desired finish: MEST-175-630 for satin stainless steel, MEST-175-DU for Duranodic dark bronze, or MEST-175-622 for flat black. This item is non-stock and ships directly from Don-Jo Manufacturing; please allow 3–10 business days lead time when planning project timelines.