Don-Jo AST-21382 Security Stri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$40.62
Don-Jo AST-21382 Security Strike 18" x 1-3/8", Silver Coated finish, double hole for 3-5/8" and 4" centered locksets

Don-Jo AST-21382 Security Strike, 18" x 1-3/8", Double Hole for 3-5/8" & 4" Centered Locksets

(No reviews yet) Write a Review

Model: AST-21382-SL
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$40.62
Adding to cart… The item has been added
Free Shipping on orders over $199.99
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Don-Jo AST-21382 Security Strike, 18" x 1-3/8", Double Hole for 3-5/8" & 4" Centered Locksets

The Don-Jo AST-21382 is a commercial security strike measuring 18" in height by 1-3/8" in width, fabricated from 13-gauge (.095) ferrous material. The double-hole configuration accepts both 3-5/8" and 4" centered locksets. Available in Brass Plated and Silver Coated finishes. Sold in shelf packs of 10.

Key Features

  • 18" Height: Extended strike plate coverage for commercial door frames.
  • 1-3/8" Width: Fits standard commercial frame preparations.
  • 13-Gauge (.095) Ferrous Construction: Structural resistance to forced entry in high-traffic applications.
  • Double Hole Configuration: Accommodates 3-5/8" and 4" centered locksets in a single plate.
  • Shelf Pack of 10: Packaged for multi-door installations and contractor procurement.

Technical Specifications

  • Model: AST-21382
  • Height: 18"
  • Width: 1-3/8"
  • Material: Ferrous
  • Gauge: 13 ga. (.095)
  • Hole Configuration: Double hole for 3-5/8" and 4" centered locksets
  • Available Finishes: Brass Plated (BP), Silver Coated (SL)
  • Application: Commercial

Typical Applications

  • Commercial office and retail buildings
  • Educational facilities
  • Healthcare institutions
  • Industrial and warehouse facilities
  • Multi-tenant residential properties
  • Government and municipal buildings

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 Strike
Commercial/Residential:
Commercial
Product Model:
AST 21382
Door Strike:
Security Strike
Product Category:
Parts and Accessories
Product Substrate:
Ferrous
Department:
Door Hardware

Don-Jo AST-21382-SL – Frequently Asked Questions

1) Will the Don-Jo AST-21382 security strike work with my 3-5/8 inch centered lockset, or do I need the 4 inch version?
Both. The AST-21382 is a double hole strike, with two latch holes punched so it takes either a 3-5/8 inch centered lockset or a 4 inch centered one. That is the point of the double hole layout: one part covers both center dimensions, so a building with mixed lockset centers can standardize on a single strike instead of stocking two.
2) How wide a door frame do I need for an 18 inch Don-Jo security strike?
The AST-21382 measures 18 inches by 1-3/8 inches. The 1-3/8 inch dimension is the width, so it sits on a standard commercial frame face without overhanging into the stop or the door rabbet. The 18 inch run is what covers the frame above and below the latch hole, which is where a pried frame usually fails.
3) Is a Don-Jo 13 gauge security strike strong enough to stop someone spreading the frame with a pry bar?
The AST-21382 is fabricated from ferrous material at 13 gauge, .095 inch thick. That is the reason for the part: a strike this thick spanning 18 inches ties the frame together across the latch area, so a pry bar loading a single point has to deform the whole plate rather than just the small factory strike cutout. Standard frame strikes are much lighter stock and localize the load.
4) Is the Detex 92 strike kit a replacement for the Don-Jo AST-21382 security strike?
No, they solve different problems. The Don-Jo AST-21382 is a security strike measuring 18 inches by 1-3/8 inches in 13-gauge (.095) ferrous material, with a double hole that takes both 3-5/8 inch and 4 inch centered locksets, so it reinforces the strike side of a frame on a standard commercial opening. The Detex 92 Strike Kit is part of the Detex 90 Strike Series and is a double door strike kit supplied with tamper resistant fasteners, which is what you reach for on a pair of doors where the strike lands on the inactive leaf rather than the frame. If the opening is a single door with a keyed lockset, the AST-21382 is the reinforcement; if it is a double door application, the Detex 92 kit is the right family.
5) Is this a strike for a commercial door or will it work in an apartment?
Don-Jo lists the AST-21382 as commercial. In practice it goes on any hollow metal or wood frame carrying a cylindrical or mortise lockset at 3-5/8 or 4 inch centers, which includes apartment entry doors in multi-tenant buildings. Property managers use exactly this sort of long reinforcing strike on unit doors that have been kicked once already.
6) Do I get one strike or a box when I order the Don-Jo AST-21382?
It ships in shelf packs of 10. That suits a contractor or a maintenance shop doing a run of doors; for a single opening you are still buying the pack of ten.
7) Can I use the AST-21382 on a door with an exit device or panic hardware?
No. The AST-21382 is punched for centered locksets at 3-5/8 and 4 inches, which is knob and lever lockset geometry, not rim exit device strike prep. For a rim device on a pair of doors, look at a purpose-made device strike such as the Detex 92 Strike Kit from the 90 Strike Series.
8) What is the difference between the Trimco 1260P and a Don-Jo 18 inch security strike?
The Trimco 1260P is a pipe adapter strike from the Trimco 1260 Series, supplied as a strike only, and it is chosen for the adapter application it is designed around rather than for frame reinforcement. The Don-Jo AST-21382 is a security strike in 13-gauge (.095) ferrous material, 18 inches tall by 1-3/8 inches wide, with two latch holes so one part covers both 3-5/8 inch and 4 inch centered locksets. Buying the 1260P expecting a tall reinforcement plate on the strike jamb will not get you there; the AST-21382 is the part sized for that job.
9) I need a tamper resistant strike for a school exterior opening - does the Don-Jo AST-21382 come with security fasteners?
The Don-Jo AST-21382 is specified by its plate: 18 inches by 1-3/8 inches of 13-gauge (.095) ferrous stock, double holed for 3-5/8 inch and 4 inch centered locksets, in BP brass plated or SL silver coated. Where the specification calls out tamper resistant fasteners by name, the Detex 92 Strike Kit in the 90 Strike Series is supplied as a double door strike kit with tamper resistant fasteners. On a single leaf where the requirement is thickness of steel across the strike area, the 13-gauge AST-21382 is the part that answers it.
10) What finishes does the Don-Jo AST-21382 come in?
Two: BP brass plated and SL silver coated. Silver coated is the usual pick when the frame is painted or aluminum tone; brass plated matches brass lever and knob trim. Both are the same 13 gauge ferrous plate underneath, so finish is a match question, not a strength question.
11) Will a brass plated Don-Jo strike rust if the door is exposed to weather?
The AST-21382 plate is ferrous, so the plating or coating is what stands between the steel and moisture. On a covered interior or vestibule opening that is fine. On a fully exposed exterior frame, expect the finish to be the wear point, and specify accordingly.
How fast can I get the Don-Jo AST-21382-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-21382-SL come with a warranty?
Absolutely. The Don-Jo AST-21382-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-21382-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-21382-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.
!