PDQ 639001-M Head Chassis, Mor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$216.57
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PDQ 639001-M Head Chassis, Mortise, Wide Stile, panic or fire (replacement only)

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Model: 639001M

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

$216.57
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PDQ 639001-M Head Chassis, Mortise, Wide Stile, panic or fire (replacement only)

Replacement Parts for PDQ 6300 and 6400 Series Exit Devices

PDQ part number 639001-M: Head Chassis, Mortise, Wide Stile, panic or fire (replacement only). 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: 639001-M

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Device Housings and Covers
Product Type:
Case Assembly
Product Category:
Parts and Accessories
Product Model:
639001-M
Commercial/Residential:
Commercial
Tags:
pdq 639001-m, 639001-m pdq, 639001-m
Subcategory:
Parts and Accessories
Parts and Accessories Type:
Chassis
Series:
6300 Series

PDQ 639001M – Frequently Asked Questions

1) What exactly is the PDQ 639001-M part, and which exit devices does it fit?
The 639001-M is a head chassis assembly for a mortise-type exit device on a wide stile door, and it's a genuine PDQ part. It is the service part for PDQ 6300 Series wide stile exit devices in the mortise configuration. It is sold as a replacement only, meaning it goes into an already installed device rather than being ordered as a complete new exit device.
2) Can I use the PDQ 639001-M head chassis on a narrow stile aluminum door?
No. The 639001-M is the wide stile chassis, which belongs on PDQ 6300 Series devices. For narrow stile doors PDQ uses the 6400 Series, and you need the narrow stile head chassis for that family instead. Ordering the wide stile part for a narrow stile device leaves you with a chassis that will not mount.
3) Is the 639001-M chassis for a rim device or a mortise device?
Mortise. The 639001-M is the mortise-configuration head chassis. PDQ 6300/6400 replacement parts are offered separately for rim, surface vertical rod, concealed vertical rod and mortise devices, so the chassis has to match the device configuration already on the door. If your device latches into a rim strike on the frame face rather than into a mortise lock body in the door edge, this is not the chassis you want.
4) Will the PDQ 639001-M work on a fire rated door, or is it panic only?
The 639001-M head chassis covers both panic and fire applications on PDQ 6300 Series wide stile mortise devices. PDQ offers head chassis assemblies in panic rated and fire rated versions as replacement items, and this one is specified for panic or fire use. On a fire door opening, keep in mind the device must stay non-dogging to remain code compliant for that opening.
5) Do I have to replace the whole PDQ exit device if the chassis is worn out?
No. PDQ supports servicing an installed 6300 or 6400 device in place: 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 are all offered as factory parts. Swapping in the 639001-M mortise wide stile chassis lets you keep the existing push bar, covers and door prep.
6) Can I add cylinder dogging or an alarm to my existing PDQ 6300 device instead of buying a new one?
Yes. PDQ offers conversion kits that add cylinder dogging or an alarm to an already installed 6300 or 6400 Series device. Those are separate kits from the 639001-M head chassis, so order them in addition if you want those functions. Note that dogging is not appropriate on a fire rated opening.
7) Is the PDQ 639001-M suitable for commercial openings in a school or office building?
Yes, it's a commercial-duty part. The 639001-M is classified for commercial use and is part of PDQ's 6300 Series exit device program, which is the wide stile hollow metal and wood door family. For facilities standardizing on PDQ, stocking the matching head chassis means a failed device can be put back in service without changing door prep.
8) What part number do I give my distributor for the PDQ wide stile mortise head chassis?
Ask for PDQ 639001-M, the head chassis for mortise, wide stile, panic or fire. That is the manufacturer part number and the only configuration this part is offered in, so there are no finish or handing options to specify with it.
How fast can I get the PDQ 639001M 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 639001M come with a warranty?
Absolutely. The PDQ 639001M 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 639001M?
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 639001M 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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