Don-Jo EST-104 Extended Lip AS...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$38.01
Don-Jo EST-104 Extended Lip ASA Door Strike, 4-7/8" x 4", 13 Gauge

Don-Jo EST-104 Extended Lip ASA Door Strike, 4-7/8" x 4", 13 Gauge

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Model: EST-104-DU
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$38.01
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Don-Jo EST-104 Extended Lip ASA Door Strike, 4-7/8" x 4", 13 Gauge

The Don-Jo EST-104 is a heavy-duty Extended Lip ASA Strike designed for commercial door applications requiring a robust, reliable latch engagement solution. Measuring 4-7/8" in height and 4" in width — with the width measured from the center of the screw hole to the end of the lip — this strike is constructed from 13-gauge (.095) steel for exceptional strength and durability. Available in multiple finishes including DU, 622, and 630, the EST-104 is a versatile choice for a wide range of commercial door hardware installations.

Key Features

  • Precise Dimensions: 4-7/8" height and 4" width (measured from center of screw hole to end of lip) for accurate, code-compliant installation on commercial doors.
  • Heavy-Gauge Construction: Manufactured from 13-gauge (.095) steel, providing superior strength and long-term durability in high-traffic commercial environments.
  • Extended Lip Design: ASA-standard extended lip configuration ensures reliable latch capture and smooth door operation across compatible locksets.
  • Single Latch Hole: Features 1 latch hole for straightforward compatibility with standard latch bolt configurations.
  • Multiple Finish Options: Available in DU, 622, and 630 finishes to coordinate with existing door hardware and architectural requirements.
  • Convenient Shelf Pack: Sold in shelf packs of 5, making it easy to stock for multi-door projects or facility maintenance needs.
  • Commercial Grade: Engineered specifically for commercial applications where dependable latch engagement and hardware longevity are essential.

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 EST-104?

Don-Jo door strike products are built to meet the demands of commercial door hardware installations, with the EST-104 delivering reliable performance through its 13-gauge (.095) steel construction and ASA-standard extended lip design. The precise 4-7/8" x 4" profile ensures proper fit and latch engagement across a broad range of compatible commercial locksets. For facilities managers, contractors, and hardware professionals seeking a dependable, multi-finish door strike solution, the Don-Jo EST-104 is a proven choice.

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:
EST 104
Door Strike:
Extended Lip ASA Strike
Product Category:
Parts and Accessories
Department:
Door Hardware

Don-Jo EST-104-DU – Frequently Asked Questions

1) Will the Don-Jo EST-104 strike fit a standard ASA lock prep in my frame?
The EST-104 is an ASA strike measuring 4-7/8 by 4 inches, so it drops into the standard ASA (T-strike) frame cutout used with commercial mortise and cylindrical locksets. The 4-inch dimension is the width measured from the center of the screw hole to the end of the lip, not the face width of the plate, so a frame already prepped for a 4-7/8 inch ASA strike takes it without new machining. It has one latch hole, so it suits a single latchbolt lockset rather than a lock with a separate deadbolt hole.
2) What does the extended lip on the EST-104 door strike actually do for me?
An extended lip carries the latchbolt out past the face of the frame, which is what you need when the door is set back from the frame face, when there is a heavy stop or applied trim, or when the latch is dragging on the edge of a standard lip. The EST-104's 4-inch dimension is taken from the center of the screw hole out to the end of that lip, so that number is what tells you how far the lip reaches. If your latch is already engaging cleanly on a standard ASA strike, you do not need the extended lip version.
3) Can I use the EST-104 ASA strike on a pair of doors with no mullion?
No. The EST-104 is a single ASA frame strike with one latch hole, meant for a latchbolt landing in a jamb or a mullion. A pair of doors with no center mullion needs a strike built for that condition, such as the Detex 92 Strike Kit for double doors from the Detex 90 Strike Series, which comes with tamper resistant fasteners. Use the EST-104 on the single-leaf openings and the double-door kit on the pairs.
4) Does the EST-104 strike work with a lockset that has both a latch and a deadbolt?
Not on its own. The EST-104 has a single latch hole, so it captures one latchbolt. A mortise lock throwing both a latch and a deadbolt needs a strike prepped with two openings. For a cylindrical latch or a mortise lock with a single bolt into the frame, one hole is all you need.
5) Is the Trimco 1260P a substitute for the Don-Jo EST-104 extended lip ASA strike?
No - they solve different problems. The Don-Jo EST-104 is an extended lip ASA strike, 4-7/8 inches high by 4 inches wide with the width taken from the center of the screw hole to the end of the lip, in 13-gauge (.095) steel with a single latch hole, meant to be mortised into a frame so a standard latch bolt catches. The Trimco 1260P is a pipe adapter strike from the 1260 Series - a strike that adapts to pipe, not a flat ASA frame prep. If the opening has a conventional hollow metal or wood frame with an ASA cutout, the EST-104 is the part that fits it; the 1260P is what you reach for when the strike has to land on pipe instead.
6) For a pair of doors, does the Don-Jo EST-104 work or do I need a double door strike kit?
The Don-Jo EST-104 is a single extended lip ASA strike with one latch hole, sized 4-7/8 inches by 4 inches in 13-gauge (.095) steel, so it handles one latch point in a frame. A double door opening without a mullion has no frame jamb to mortise into on the active leaf side, and that is what the Detex 92 Strike Kit from the 90 Strike Series is built for - a double door strike kit supplied with tamper resistant fasteners. Confirm what the leaf is latching into before you order: frame, and the EST-104 applies; inactive leaf on a pair, and the Detex 92 kit is the right family.
7) Is 13-gauge steel heavy enough for a school or hospital door that gets hammered all day?
13 gauge is .095 inch steel, which is a heavy strike by commercial standards and is what the EST-104 is built from. That thickness is the point of the part: on high-cycle openings the strike is usually what deforms first, and a thin plate will bell out around the latch hole and start letting the door rattle. It's a commercial-rated part, used on offices, schools, healthcare, retail, warehouses and multi-tenant residential.
8) What finishes does the Don-Jo EST-104 ASA strike come in, and which matches my existing hardware?
Three finishes: 622 matte black, 630 satin stainless steel, and DU duronodic brown coated. 630 is the one that matches the satin stainless levers and exit devices on most commercial openings. 622 matte black pairs with black hardware, and DU duronodic is the dark bronze coating used on older aluminum storefront and mid-century commercial entrances. Pick the strike finish off whatever is already on the lockset, since the strike sits in the frame right beside it.
9) Difference between the Don-Jo EST-104 and a Trimco 1260P strike?
Different jobs. The EST-104 is an extended lip ASA strike in 13-gauge steel that mounts in a door frame to receive a latchbolt. The Trimco 1260P is a pipe adapter strike from Trimco's 1260 Series, and it is sold as the strike only. If what you are replacing is a conventional ASA strike sitting in a hollow metal frame, the EST-104 is the like-for-like part.
10) Is the Don-Jo EST-104 the same strike as an ANSI/ASA 4-7/8 inch strike plate?
Same family, extended lip version. ASA and ANSI strike are the trade names for the 4-7/8 inch tall curved-lip frame strike used across commercial hollow metal frames, and the EST-104 is that pattern with a longer lip, catalogued by Don-Jo as model EST 104. If a door schedule calls for a 4-7/8 inch ASA strike and the field condition needs more lip reach, this is the part.
11) I need a strike that resists someone backing the screws out - is the Don-Jo EST-104 the one?
The Don-Jo EST-104 is a heavy-duty extended lip ASA strike in 13-gauge (.095) steel, and its strength argument is the material and the ASA lip geometry that captures the latch. If the concern is specifically the fasteners being attacked from the outside, the Detex 92 Strike Kit in the 90 Strike Series is supplied with tamper resistant fasteners as part of the kit. The two are different answers to different threats - gauge and latch capture on the Don-Jo side, fastener security on the Detex side - so match the choice to what is actually exposed on the opening.
12) I'm restriking one door. Do I have to buy a whole box of EST-104 strikes?
The EST-104 is sold in shelf packs of 5. For a single door that means you end up with spares, which is generally how property managers and maintenance shops buy strikes anyway, since they fail one at a time across a building. If you are standardizing a run of openings on one finish, the 5-pack is the unit to order against.
13) What finish options should I be looking at if I am matching the Don-Jo EST-104 to existing hardware?
The Don-Jo EST-104 extended lip ASA strike comes in 622 matte black, 630 satin stainless steel, and DU duronodic brown coated. Among the alternatives, the Detex 92 Strike Kit is a 90 Strike Series double door kit and the Trimco 1260P is a 1260 Series pipe adapter strike - both are different strike types rather than finish variations, so if the driver is matching a black or satin stainless door package across a floor of openings, the EST-104 is the part with the finish range to standardize on.
How fast can I get the Don-Jo EST-104-DU 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 EST-104-DU come with a warranty?
Absolutely. The Don-Jo EST-104-DU 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 EST-104-DU?
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
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