PDQ 88644 Cylinder Retaining N...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$6.86
Image coming soon

PDQ 88644 Cylinder Retaining Nut (alarm kit, cylinder dogging, 6N, 6W)

(No reviews yet) Write a Review

Model: 88644

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

$6.86
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

PDQ 88644 Cylinder Retaining Nut (alarm kit, cylinder dogging, 6N, 6W)

Replacement Parts for PDQ 6300 and 6400 Series Exit Devices

PDQ part number 88644: Cylinder Retaining Nut (alarm kit, cylinder dogging, 6N, 6W). A genuine PDQ part.

These are factory replacement and conversion parts for PDQ 6300 Series wide stile and 6400 Series narrow stile exit devices, covering rim, surface vertical rod, concealed vertical rod and mortise configurations. The range includes head chassis assemblies, latchbolts, rods and connectors, push bars, covers and end caps, strikes and shims, dogging and alarm conversion kits, screwpacks and signal switches, so an existing device can be serviced or upgraded without replacing the whole unit.

Key Features

  • Genuine PDQ parts for 6300 Series wide stile and 6400 Series narrow stile exit devices
  • Covers rim, surface vertical rod, concealed vertical rod and mortise device configurations
  • Panic rated and fire rated head chassis available for replacement
  • Conversion kits add cylinder dogging or an alarm to an installed device
  • Strikes, shims, drill guides and screwpacks for installation and adjustment

Technical Specifications

  • Manufacturer Part Number: 88644

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Device Mounting and Dogging
Product Type:
Cylinder Nut
Product Category:
Parts and Accessories
Product Model:
88644
Commercial/Residential:
Commercial
Tags:
pdq 88644, 88644 pdq, 88644
Subcategory:
Parts and Accessories
Parts and Accessories Type:
Screw Pack or Fastener
Series:
6300 Series

PDQ 88644 – Frequently Asked Questions

1) What is PDQ part 88644 and what does it do on an exit device?
PDQ 88644 is the cylinder retaining nut used with PDQ alarm kits and cylinder dogging, called out for 6N and 6W applications. It is the fastener that holds the cylinder in place in the device, so it is the piece you need when you are adding or servicing cylinder dogging or an alarm on an installed PDQ exit device rather than replacing the whole unit.
2) Which PDQ exit devices does the 88644 retaining nut fit?
It is a factory part for PDQ 6300 Series wide stile and 6400 Series narrow stile exit devices, which covers rim, surface vertical rod, concealed vertical rod and mortise configurations. If your device is a PDQ 6300 or 6400 with cylinder dogging or an alarm kit, this is the correct retaining nut.
3) Will the PDQ 88644 nut work on another brand's exit device cylinder?
No. The 88644 is a genuine PDQ part made for PDQ 6300 and 6400 Series devices. It is not a universal cylinder nut, and there is no cross-brand fit to rely on, so ordering it for a Von Duprin, Falcon or Precision device is the wrong call.
4) Do I need the 88644 separately if I am ordering a PDQ cylinder dogging or alarm conversion kit?
The 88644 is the retaining nut associated with those kits, and it is stocked on its own so a service tech can replace a lost or stripped nut without buying another kit. If you are converting a device and the kit you have is missing the nut, order 88644 to complete it.
5) Can I keep my existing PDQ exit device and just add cylinder dogging instead of replacing it?
Yes, that is the point of the PDQ parts program. Cylinder dogging and alarm conversion kits are made to go onto an already-installed 6300 or 6400 Series device, and the 88644 retaining nut is the hardware that secures the cylinder in that conversion. The chassis, push bar and latching stay in place.
6) Is the PDQ 88644 a commercial-duty part or for residential doors?
Commercial. It is door hardware for PDQ panic and fire exit devices, the kind used on egress openings in schools, healthcare and multi-family common areas, not residential locksets.
How fast can I get the PDQ 88644 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 PDQ 88644 come with a warranty?
Absolutely. The PDQ 88644 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 PDQ 88644?
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 PDQ 88644 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.
!