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Stanley Security QRM311 - Grade 1 Mullion, Standard
The Stanley QRM311 is a Grade 1 listed mullion designed for installation with pairs of doors fitted with rim exit devices. Manufactured to withstand heavy commercial use, this mullion is “keyed-removable” (“KR”) for easy removal when access is required or for maintenance. Available in multiple lengths (8 ft, 9 ft, 10 ft, 11 ft, etc.) and finishes including Primer (600), Aluminum Painted (689/US28), and Dark Bronze Painted (695). Pre-prepped to accept Stanley’s QED100 and QED300 Series exit devices, the QRM311 provides strength, consistency, and design flexibility while maintaining high safety and durability standards
Specifications
| Specification | Details |
|---|---|
| Model | QRM311 – Keyed Removable Mullion |
| Grade / Rating | ANSI/BHMA Grade 1 Mullion Hardware |
| Finish Options | Primer (600), Aluminum Painted (689/US28), Dark Bronze Painted (695) |
| Lengths Available | 8′, 9′, 10′, 11′ (field-sizable) |
| Material / Construction | Steel tube, typically 2″ × 3″, 1⁄8″ wall thickness for standard usage. Head caps, bottom sills, and adapters investment cast steel in some variants |
| Compatibility | Pre-prepped for Stanley QED100 and QED300 Series exit devices |
| Fire / Hurricane Rating | Fire rating for openings up to 8 ft high (standard variants) |
| Key Feature | Keyed-removable design for ease of removal when needed (variant “KR”) |
Manufacturer Resources
Product Specs
- Category:
- Exit Devices and Trim
- Product Group:
- Exit Devices and Trim
- Series:
- QRM300 Series
- Product Subgroup:
- Exit Devices - Rim
- Product Type:
- Mullions
- Subcategory:
- Exit Devices
- Commercial/Residential:
- Commercial
Stanley Security QRM311 8 689 – Frequently Asked Questions
How fast can I get the Stanley Security QRM311 8 689 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 Stanley Security QRM311 8 689 come with a warranty?
Absolutely. The Stanley Security QRM311 8 689 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 Stanley Security QRM311 8 689?
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 Stanley Security QRM311 8 689 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.