Don-Jo AST-21386 Security Stri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$40.62
Don-Jo AST-21386 Security Strike, 18" x 1-3/8", Double Hole for 5-1/2" & 6" Centered Locksets

Don-Jo AST-21386 Security Strike, 18" x 1-3/8", Double Hole for 5-1/2" & 6" Centered Locksets

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Model: AST-21386-SL
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$40.62
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Don-Jo AST-21386 Security Strike, 18" x 1-3/8", Double Hole for 5-1/2" & 6" Centered Locksets

The Don-Jo AST-21386 is a heavy-duty commercial security strike measuring 18" in height by 1-3/8" in width, constructed from ferrous material at a robust 13-gauge (.095) thickness. This double-hole security strike is specifically designed to accommodate both 5-1/2" and 6" centered locksets, making it a versatile solution for a wide range of commercial door applications. Available in BP, SL, and WH finishes, it delivers reliable reinforcement and a professional fit for demanding environments.

Key Features

  • Generous 18" Height x 1-3/8" Width: Full-length 18" strike plate provides extended door frame coverage and superior security reinforcement for commercial installations.
  • Double-Hole Configuration: Features two latch holes designed to accommodate 5-1/2" and 6" centered locksets, offering flexible compatibility across common commercial lockset spacings.
  • Heavy-Gauge Ferrous Construction: Built from 13-gauge (.095) ferrous material for exceptional strength, impact resistance, and long-term durability in high-traffic commercial settings.
  • Multiple Finish Options: Available in BP (primed), SL (silver), and WH (white) finishes to coordinate with a variety of door frame aesthetics and project specifications.
  • Commercial-Grade Security Strike: Engineered as a security strike to provide reinforced latch engagement and enhanced door frame protection beyond standard strike plates.
  • Convenient Shelf Pack Quantity: Sold in shelf packs of 10, making this an efficient choice for contractors, distributors, and facility managers handling multiple installations.

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-21386?

Don-Jo security strike products are engineered for commercial-grade performance, combining heavy 13-gauge (.095) ferrous construction with a practical double-hole design that accommodates both 5-1/2" and 6" centered locksets. The AST-21386's 18" x 1-3/8" profile delivers extended frame coverage and robust latch reinforcement, making it a dependable choice for professionals who require reliable, long-lasting door hardware solutions in demanding commercial 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 21386
Door Strike:
Security Strike
Product Category:
Parts and Accessories
Product Substrate:
Ferrous
Department:
Door Hardware

Don-Jo AST-21386-SL – Frequently Asked Questions

1) Will the Don-Jo AST-21386 security strike work with a lockset that has 5-1/2 inch centers, or only 6 inch?
Both. The AST-21386 is a double-hole strike, punched to take either a 5-1/2 inch or a 6 inch centered lockset, so one part covers both of the common commercial spacings. That is the main reason to pick it over a single-hole strike: if a building has a mix of both spacings on its frames, you stock one strike instead of two.
2) How long is the Don-Jo AST-21386 strike plate and how wide does the frame face need to be?
It measures 18 x 1-3/8 inches. The 1-3/8 inch dimension is the one that has to sit on the strike face of your frame, so check that face before ordering, on a narrow-face frame an 18 inch plate that overhangs the stop is no good. The 18 inch run is what gives you coverage well above and below the latch, which is the point of a full-length security strike rather than a 4-7/8 inch standard strike plate.
3) Is a full-length 18 inch security strike worth it over just replacing the standard strike plate?
They solve different problems. A standard strike plate only reinforces at the latch, and a kick attack usually splits the frame or jamb above and below that point. An 18 inch strike in 13-gauge (.095) ferrous steel spreads that load across a foot and a half of frame and picks up fasteners well outside the latch pocket. If your failures are pried or kicked frames on tenant doors, this is the fix. If you just have a worn or misaligned strike lip, a standard replacement strike does the job for less work.
4) Can I use the Don-Jo AST-21386 on a pair of doors with no mullion?
No. This is a frame-mounted strike for a single door leaf latching into a jamb, sized 18 x 1-3/8 inches with holes on 5-1/2 and 6 inch centers. A pair of doors meeting at the center needs a strike made for that condition, for example the Detex 92 Strike Kit, which is a double door strike kit supplied with tamper resistant fasteners.
5) Is the Trimco 1260P a substitute for the Don-Jo AST-21386 security strike?
No. The Don-Jo AST-21386 is an 18 inch by 1-3/8 inch security strike in 13-gauge (.095) ferrous material, with a double hole pattern that takes both 5-1/2 inch and 6 inch centered locksets, so it reinforces a long run of the frame around the latch. The Trimco 1260P is a pipe adapter strike, supplied as the strike only, and it is built for a different purpose entirely. If the goal is frame reinforcement behind a standard cylindrical or mortise lockset, the AST-21386 is the part; the 1260P will not cover an 18 inch section of frame or accept 5-1/2 inch and 6 inch lockset centers.
6) What should I use on a double door pair instead of the Don-Jo AST-21386 strike?
The Don-Jo AST-21386 is a single 18 inch by 1-3/8 inch security strike sized to the latch area of one leaf, with double holes for 5-1/2 inch and 6 inch centered locksets. For a pair of doors where the strike lands on the inactive leaf rather than the frame, look at the Detex 92 Strike Kit, which is a double door strike kit from the 90 Strike Series and ships with tamper resistant fasteners. Use the AST-21386 where a lockset latches into a hollow metal or wood frame and the frame needs reinforcing.
7) What gauge steel is the Don-Jo AST-21386, and is it heavy enough for a high-traffic commercial door?
13-gauge, .095 thick, ferrous. That is heavy stock for a strike, several times the thickness of a typical stamped strike plate, and it is why the part is specified as a security strike rather than a decorative wrap. It is a commercial-duty part, catalogued and built for office, school, healthcare, retail, warehouse and multi-tenant residential openings.
8) What finishes does the Don-Jo AST-21386 security strike come in?
Three: BP brass plated, SL silver coated, and WH white coated. WH is the one property managers usually want on painted white frames in multi-family and hospitality, since it disappears against the jamb. SL suits aluminum or grey frames. BP is the choice when the rest of the door hardware is brass tone. Since the strike is ferrous, all three are a coating over steel, so on an exterior or wash-down opening plan on touching up any field cuts.
9) Do I have to buy the Don-Jo AST-21386 in a multi-pack?
It is sold in shelf packs of 10. That suits the way the part is normally used, a run of tenant doors or a whole corridor being reinforced at once, rather than a single opening. If you are doing one door, you will still be buying the ten.
10) My lockset centers do not match 5-1/2 or 6 inches. Is there another strike option?
The AST-21386 will not help you, its two holes are fixed at 5-1/2 and 6 inch centers and there is no field adjustment in 13-gauge steel. For an odd condition, look at a purpose-built strike such as the Trimco 1260P pipe adapter strike, which is a strike-only part from the 1260 Series. Otherwise measure the existing centers and match a strike punched for that spacing rather than trying to open up holes in a security plate, which defeats the reinforcement.
11) Will the same Don-Jo security strike work on left and right hand doors?
Handing is not a factor. A strike mounts on the frame and the plate is symmetrical top to bottom over its 18 inch length, so one part number covers both hands and both swings. You only need to decide finish and get the hole centers right, 5-1/2 or 6 inch, against the lockset you are latching into.
How fast can I get the Don-Jo AST-21386-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-21386-SL come with a warranty?
Absolutely. The Don-Jo AST-21386-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-21386-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-21386-SL from ZenSupply?
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