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PDQ 639721 Screwpack, Head Cover or SVR Latch Cover
Replacement Parts for PDQ 6300 and 6400 Series Exit Devices
PDQ part number 639721: Screwpack, Head Cover or SVR Latch Cover. 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: 639721
Manufacturer Resources
Product Specs
- Department:
- Door Hardware
- Product Group:
- Exit Devices and Trim
- Product Subgroup:
- Exit Device Mounting and Dogging
- Product Type:
- Screw Pack
- Product Category:
- Parts and Accessories
- Product Model:
- 639721
- Commercial/Residential:
- Commercial
- Tags:
- pdq 639721, 639721 pdq, 639721
- Subcategory:
- Parts and Accessories
- Parts and Accessories Type:
- Cover or End Cap
- Series:
- 6300 Series
PDQ 639721 – Frequently Asked Questions
1) What exactly is PDQ part 639721?
PDQ 639721 is a factory screwpack for a head cover or an SVR latch cover on PDQ exit devices. It is a cover/end cap level service part, not a complete device or a latch assembly, so you order it when the fasteners for the head cover or the surface vertical rod latch cover are missing, stripped, or left behind by a previous repair.
2) Which PDQ exit devices does the 639721 screwpack fit?
It is a genuine PDQ service part for the 6300 Series wide stile and 6400 Series narrow stile exit devices, which covers rim, surface vertical rod, concealed vertical rod and mortise configurations. If the device on your door is from another family or another manufacturer, this is not the screwpack for it.
3) Do I need this screwpack or a whole new exit device head cover?
Buy 639721 when the cover itself is sound and only the mounting screws are the problem. PDQ supplies the covers, end caps, head chassis assemblies, latchbolts, rods and strikes as separate replacement parts for the 6300 and 6400 Series, so a damaged cover is a different line item and you can service the device without replacing the whole unit.
4) I have a PDQ surface vertical rod device on a pair of doors. Is this the right screwpack for the latch cover?
Yes, the 639721 screwpack covers the SVR latch cover fasteners as well as the head cover, so it applies to the surface vertical rod configuration of the 6300 and 6400 Series. On a pair, each leaf with an SVR device has its own latch cover, so count the covers you are servicing before ordering.
5) Is this a commercial-grade PDQ part or something for a residential door?
Commercial. The 639721 screwpack belongs to PDQ's commercial door hardware line and services panic exit devices, the kind used on egress doors in schools, offices and multi-family corridors, not residential locksets.
6) Is PDQ 639721 an aftermarket screw kit or a genuine PDQ part?
Genuine PDQ. Part number 639721 is a factory replacement part, which matters on fire rated and panic rated openings where substituting non-factory fasteners on a listed device can put the device's listing in question.
How fast can I get the PDQ 639721 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 639721 come with a warranty?
Absolutely. The PDQ 639721 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 639721?
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 639721 from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.