Don-Jo AST-21341 Security Stri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$37.70
$31.13
Don-Jo AST-21341 Security Strike 18" x 1-3/4" Single Hole for Commercial Doors

Don-Jo AST-21341 Security Strike 18" x 1-3/4" Single Hole for Commercial Doors

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Model: AST-21341-BP
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$37.70
$31.13
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Don-Jo AST-21341 Security Strike 18" x 1-3/4" Single Hole for Commercial Doors

The Don-Jo AST-21341 is a heavy-duty commercial security strike measuring 18" in height and 1-3/4" in width, engineered to reinforce door frames and resist forced entry in demanding commercial environments. Constructed from ferrous material at a robust 13-gauge (.095) thickness, this single-hole security strike delivers exceptional strength and durability. Available in multiple finishes including BP, SL, and WH, the AST-21341 is designed to complement a wide range of commercial door hardware installations.

Key Features

  • Generous Dimensions: Measures 18" in height and 1-3/4" in width, providing extended frame coverage and superior reinforcement for commercial door applications.
  • Heavy-Gauge Construction: Fabricated from 13-gauge (.095) ferrous material for exceptional rigidity and resistance to forced entry attempts.
  • Single Latch Hole Configuration: Features one precisely positioned latch hole for straightforward compatibility with standard commercial locksets and latches.
  • Ferrous Material: Durable ferrous construction ensures long-lasting performance and structural integrity in high-traffic commercial settings.
  • Multiple Finish Options: Available in BP, SL, and WH finishes to coordinate with existing door hardware and architectural requirements.
  • Commercial-Grade Quality: Designed and rated for commercial applications, meeting the demands of offices, institutions, and other high-use environments.
  • Convenient Shelf Pack: Sold in shelf packs of 10, making it easy to stock for multi-door projects or ongoing maintenance needs.

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-21341?

Don-Jo security strike products are built to professional-grade standards, with the AST-21341 featuring 13-gauge (.095) ferrous construction that delivers the structural reinforcement required in demanding commercial door applications. Engineered for reliability and ease of installation, this security strike provides the frame protection professionals trust for long-term performance in high-traffic environments.

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 21341
Door Strike:
Security Strike
Product Category:
Parts and Accessories
Product Substrate:
Ferrous
Department:
Door Hardware

Don-Jo AST-21341-BP – Frequently Asked Questions

1) What is the Don-Jo AST-21341 security strike actually for?
The AST-21341 is a frame reinforcement strike, not a lock. It is an 18 x 1-3/4 inch plate with a single latch hole that covers the strike area of the frame so a latch cannot be pried or kicked through the jamb. The lock, latch and cylinder stay as they are; the strike replaces or covers the existing strike area of the jamb.
2) Will the Don-Jo AST-21341 work with my existing commercial lockset?
The AST-21341 has one latch hole, so it suits a single-point latch or a deadbolt on its own, not a lockset that needs two separate openings in the strike. If your opening has both a latch and a deadbolt entering the jamb at different heights, this single-hole plate will not cover both, and you need a two-hole security strike instead.
3) Is an 18 inch security strike too long for my door frame?
Length is the point. At 18 inches the plate spans well above and below the latch, so the fasteners land in frame material away from the strike cutout where a pry bar has nothing to grab. The 1-3/4 inch width is what has to fit: it needs that much flat face on the jamb at the strike side. On a narrow rabbet or a frame with a tight stop, measure the flat before ordering.
4) Can I use the Don-Jo AST-21341 on a pair of doors?
No. The AST-21341 mounts to the frame jamb and has a single latch hole, which is a single-door application. For a pair of doors with no mullion, the Detex 92 Strike Kit is the double-door strike kit, from the Detex 90 Strike Series, and it ships with tamper resistant fasteners.
5) Is a Trimco 1260P pipe adapter strike a substitute for a Don-Jo AST-21341 security strike?
No. The Trimco 1260P is a pipe adapter strike, supplied as the strike only, from the Trimco 1260 Series, and it is intended to adapt a latch to a pipe or tubular frame member. The Don-Jo AST-21341 is a flat security strike in ferrous material, 18 inches tall and 1-3/4 inches wide with a single latch hole, that reinforces a conventional door frame across an extended run. They mount to different frame conditions, so one does not drop into the other's prep.
6) What should I use to secure a pair of double doors instead of an 18-inch security strike?
The Don-Jo AST-21341 is a single-hole security strike sized 18 inches by 1-3/4 inches for reinforcing a door frame at one latch point, so it suits a single opening or one leaf. For a double-door opening, the Detex 92 Strike Kit is built for double door applications and comes with tamper resistant fasteners; it belongs to the Detex 90 Strike Series. The two solve different geometry: a frame-mounted reinforcing strike at one latch location versus a kit intended for the meeting point of a pair of doors.
7) How thick is the Don-Jo AST-21341 strike plate?
13-gauge, .095 inch ferrous steel. That thickness is what separates a security strike from a standard replacement strike, and it is why it stands off a kick better than the thin plate that came with the lock. It also means the plate sits proud of the jamb face unless the frame is mortised for it, so plan the install accordingly.
8) How many Don-Jo AST-21341 strikes do I get in a pack?
They come in shelf packs of 10. That works out well for a property manager or MRO buyer hardening a corridor or a run of tenant doors in one pass, and it is worth knowing if you only need one opening covered.
9) I need a strike for a round tubular frame, not a flat jamb. What are my options?
The Don-Jo AST-21341 security strike is a flat 13-gauge ferrous plate for a standard commercial frame face, so a round tubular member is outside what it seats against. The Trimco 1260P from the 1260 Series is a pipe adapter strike, furnished as the strike only, and is the piece made for adapting a latch to a pipe frame. Confirm the latch you are using lands in the 1260P's prep before ordering, since it ships without the surrounding hardware.
10) If the concern is someone attacking the fasteners, is there a strike option that addresses that directly?
Two approaches exist. The Don-Jo AST-21341 answers it with mass and coverage: an 18-inch by 1-3/4 inch single-hole strike in 13-gauge (.095) ferrous material, spreading force over a long section of the frame at the latch. The Detex 92 Strike Kit, from the 90 Strike Series, addresses the fasteners themselves and is supplied with tamper resistant fasteners for double door use. Which fits depends on whether the opening is a single leaf or a pair.
11) Is the Don-Jo AST-21341 rated for commercial use or is it residential grade?
Commercial. It is specified as a commercial security strike and the 13-gauge ferrous body is built for the traffic in offices, schools, healthcare, retail, warehouses, multi-tenant residential and municipal buildings. Small landlords use them on tenant entry doors for the same reason.
12) Will the Don-Jo AST-21341 rust if I install it on an exterior door?
The body is ferrous, so the coating is doing the corrosion work. BP is a plate finish and SL and WH are coatings. On a weather-exposed opening, keep the coating intact at the fastener holes and any field cutting, since bare ferrous edges are where corrosion starts.
How fast can I get the Don-Jo AST-21341-BP 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-21341-BP come with a warranty?
Absolutely. The Don-Jo AST-21341-BP 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-21341-BP?
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-21341-BP from ZenSupply?
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