Don-Jo AST-2138M Security Stri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$37.70
$32.24
Don-Jo AST-2138M Security Strike for Mortise Lock, 18" x 1-3/8", 13 Gauge Ferrous Steel

Don-Jo AST-2138M Security Strike for Mortise Lock, 18" x 1-3/8", 13 Gauge Ferrous Steel

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Model: AST-2138M-SL
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$37.70
$32.24
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Don-Jo AST-2138M Security Strike for Mortise Lock — 18" x 1-3/8", 13 Gauge Ferrous Steel

The Don-Jo AST-2138M is a heavy-duty commercial security strike designed specifically for mortise lock applications. Measuring 18" in height and 1-3/8" in width, this security strike is constructed from 13-gauge (.095) ferrous steel, delivering the structural integrity required for demanding commercial door installations. Available in BP, SL, and WH finishes, the AST-2138M provides a reliable and code-compliant reinforcement solution for commercial door frames.

Key Features

  • Generous 18" Height: The extended 18" height provides maximum frame reinforcement coverage for enhanced security in commercial applications.
  • Precise 1-3/8" Width: Engineered to a 1-3/8" width for accurate alignment and compatibility with standard mortise lock door preparations.
  • Heavy-Duty 13-Gauge Construction: Fabricated from 13 ga. (.095) ferrous steel for superior strength and resistance to forced entry in high-traffic commercial environments.
  • Mortise Lock Compatibility: Designed specifically for mortise lock configurations, featuring a single latch hole for precise hardware alignment.
  • Multiple Finish Options: Available in BP, SL, and WH finishes to coordinate with a variety of door hardware and frame aesthetics.
  • Commercial-Grade Durability: Rated for commercial use, making it suitable for office buildings, schools, healthcare facilities, and other demanding environments.
  • Convenient Shelf Pack Quantity: Sold in shelf packs of 10, supporting efficient inventory management for contractors and distributors.

Technical Specifications

  • Subcategory: Door Strikes
  • Product Group: Parts and Accessories
  • Product Subgroup: Door Strikes and Strike Boxes
  • Product Type: Door Strikes
  • Commercial/Residential: Commercial
  • Product Category: Parts and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Don-Jo AST-2138M?

Don-Jo security strikes are engineered to deliver professional-grade frame reinforcement using heavy-duty 13-gauge (.095) ferrous steel construction, ensuring long-term durability in high-demand commercial settings. The AST-2138M's extended 18" profile and mortise-specific single latch hole design reflect Don-Jo's commitment to precision-fit hardware solutions for commercial door security applications.

Manufacturer Resources

DON-JO Strike Plates

Product Specs

Subcategory:
Door Strikes
Product Group:
Parts and Accessories
Product Subgroup:
Door Strikes and Strike Boxes
Product Type:
Door Strikes
Commercial/Residential:
Commercial
Product Model:
AST 2138M
Door Strike:
Security Strike
Product Category:
Parts and Accessories
Product Substrate:
Ferrous
Department:
Door Hardware

Don-Jo AST-2138M-SL – Frequently Asked Questions

1) Will the Don-Jo AST-2138M security strike work with a mortise lock, or is it only for cylindrical latches?
The AST-2138M is built for mortise lock preps. It has a single latch hole cut for mortise hardware alignment, so it covers the frame at the mortise latch and deadbolt area rather than a cylindrical bore pattern. If the opening runs a cylindrical or tubular lockset, a mortise-cut strike like this won't line up with the existing latch location.
2) What size frame area does the Don-Jo AST-2138M cover?
The AST-2138M measures 18 x 1-3/8 inches. That 18 inch run gives you reinforcement well above and below the latch point, which is where a kicked frame usually deforms, and the 1-3/8 inch width is sized to the mortise strike face on a standard commercial frame. Measure the flat face of your frame before ordering: if the strike lip area is narrower than 1-3/8 inches, the plate will overhang.
3) I need to reinforce a pair of doors with no mullion. Is the AST-2138M the right part?
Not on its own. The AST-2138M is a single-leaf frame strike for a mortise lock opening. For a double door where the strike lands on the inactive leaf rather than the frame, look at the Detex 92 Strike Kit, a double door strike kit from the 90 Strike Series that ships with tamper resistant fasteners.
4) How thick is the steel on the Don-Jo AST-2138M, and is it heavy enough for a high-traffic commercial door?
13 gauge, .095 inch ferrous steel. That is the material a frame repair on an abused opening wants, and Don-Jo rates the AST-2138M for commercial use, which is why it turns up on office, school, healthcare, retail and government openings rather than residential entries.
5) Can I use a security strike like the Don-Jo AST-2138M on a pipe or round frame?
No. The AST-2138M is a flat 18 x 1-3/8 inch plate meant to sit against a flat frame face. A round post or pipe frame needs a strike made for that profile, such as the Trimco 1260P pipe adapter strike from the 1260 Series, sold as the strike only.
6) Does a Don-Jo security strike replace the existing strike plate or go over it?
A security strike of this kind is frame reinforcement, not a lip strike substitute in the mechanical sense. The AST-2138M runs 18 inches up the frame with a single mortise latch hole, so it takes the place of the short factory strike plate and spreads the load from the latch across a much longer section of the jamb. Because it is one continuous 13 gauge plate, you will need fasteners long enough to reach into the frame anchor or stud behind it, not just the original short screws.
7) What finishes does the Don-Jo AST-2138M security strike come in?
Two: BP brass plated and SL silver coated. Since the plate is ferrous steel, the finish is a coating rather than a solid material, so on an exterior or wash-down opening expect it to wear at the latch contact point like any plated steel strike.
8) How many Don-Jo AST-2138M strikes come in a pack?
Shelf packs of 10. That suits a property manager or contractor standardizing several openings on one frame reinforcement rather than buying a single plate for a one-off repair.
How fast can I get the Don-Jo AST-2138M-SL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Don-Jo AST-2138M-SL come with a warranty?
Absolutely. The Don-Jo AST-2138M-SL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Don-Jo AST-2138M-SL?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Don-Jo AST-2138M-SL from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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