Kawneer KW028557 Riser Block F...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.47
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Kawneer KW028557 Riser Block Fastener 1/4-20 x 1-9/32 FHMS Exit Device Replacement Part

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Model: KW028557

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

$13.47
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Kawneer KW028557 Riser Block Fastener 1/4-20 x 1-9/32 FHMS Exit Device Replacement Part

The Kawneer KW028557 is a genuine Kawneer service replacement part, a Riser Block Fastener with a 1/4-20 thread size and 1-9/32" length in a flat-head machine screw (FHMS) configuration. Designed for commercial exit device applications, this fastener is engineered to match OEM specifications for precise fit and reliable performance in Kawneer hardware assemblies.

Key Features

  • OEM Thread Specification: 1/4-20 thread size ensures exact compatibility with Kawneer riser block assemblies for a secure, rattle-free fit.
  • Precise Length: 1-9/32" fastener length matches original factory specifications for proper engagement and installation depth.
  • Flat-Head Machine Screw (FHMS) Design: Countersunk flat-head profile allows the fastener to sit flush within the riser block assembly, maintaining a clean installation.
  • Genuine Kawneer Service Part: Manufactured as an authorized Kawneer service component, ensuring OEM-grade quality and direct replacement fit.
  • Commercial-Grade Construction: Engineered for demanding commercial door hardware applications where dependable fastener performance is critical.
  • Exit Device Part Compatibility: Specifically categorized as an exit device replacement part, making it the correct choice for servicing Kawneer exit device assemblies.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Exit Device Parts
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: KW028557
  • Features: Kawneer Service Parts

Typical Applications

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

Why Kawneer KW028557?

Kawneer service parts are manufactured to OEM standards, ensuring that replacement components integrate seamlessly with existing Kawneer exit device assemblies. The KW028557 Riser Block Fastener delivers the precise thread specification (1/4-20) and length (1-9/32") required to restore commercial door hardware to original factory performance, minimizing downtime and maintaining the integrity of life-safety exit device systems.

Manufacturer Resources

Kawneer Service Parts Catalog

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Exit Device Parts
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
KW028557
Features:
Kawneer Service Parts

Kawneer KW028557 – Frequently Asked Questions

1) What size screw is the Kawneer KW028557 riser block fastener?
It's a 1/4-20 thread flat-head machine screw, 1-9/32 inches long. Those two numbers are what matter when you're matching it: the 1/4-20 thread has to engage the tapped riser block, and the 1-9/32 inch length sets how deep it seats. A shorter 1/4-20 screw will thread in but won't give you full engagement.
2) Why does this fastener have a flat countersunk head instead of a pan head?
The flat head (FHMS) is countersunk so the screw sits flush in the riser block assembly. Swapping in a pan or hex head of the same 1/4-20 x 1-9/32 size leaves the head proud, which can interfere with the parts that mount over it. If you're servicing a Kawneer riser block, keep the flat head.
3) Is the KW028557 a genuine Kawneer part or an aftermarket screw?
Genuine Kawneer service part, model KW028557, built to OEM thread and length spec. For exit device work in a building already standardized on Kawneer storefront hardware, that matters more than it sounds: hardware-store 1/4-20 screws vary in head diameter and countersink angle, and the riser block is machined for the factory part.
4) What does a riser block fastener actually do on an exit device?
The riser block is the spacer that sets the exit device off the door face at the correct height and plane; this screw is what holds that block in place. If the block is loose the pushbar sits off and the latch action gets sloppy, so on a service call a stripped or missing riser block screw is a common cause of a device that no longer latches cleanly.
5) I need to restock riser block screws for a building full of Kawneer exit devices. Is this the right part to order in quantity?
Yes, if the devices are Kawneer and you're replacing the riser block fastener. KW028557 covers the 1/4-20 x 1-9/32 flat-head position. Pull one existing screw first and check thread and length against those figures, since a Kawneer assembly can use more than one screw size and the shorter ones won't interchange.
6) Is this screw suitable for residential door hardware or is it commercial only?
It is classed as a commercial part, meant for Kawneer exit device assemblies in offices, schools, healthcare, retail, industrial, government, and multi-tenant residential buildings. Residential entry locks don't use riser blocks, so this isn't a part that crosses over.
How fast can I get the Kawneer KW028557 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 Kawneer KW028557 come with a warranty?
Absolutely. The Kawneer KW028557 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 Kawneer KW028557?
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 Kawneer KW028557 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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