Corbin Russwin Inside Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$56.13
Corbin Russwin Inside Spring Housing for CL3300 Series

Corbin Russwin Inside Grade 1 Spring Housing for CL3300 Series

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Model: 37.47
Selected Spring Housing for CL3300 Series is

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

$56.13
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Corbin Russwin 783F308 Inside Spring Housing for CL3300 Series, 1-3/4" to 2" Door Thickness

Genuine Replacement Spring Housing Component for CL3300 Series Door Hardware

The Corbin Russwin 783F308 Inside Spring Housing is a precision-engineered replacement component designed specifically for compatibility with the Corbin Russwin CL3300 Series door hardware. This inside spring housing accommodates door thicknesses from 1-3/4" to 2", making it a reliable solution for maintaining the proper function of CL3300 Series installations in commercial environments. Sourced directly from Corbin Russwin, this part ensures a proper fit and consistent performance when servicing or restoring existing hardware.

Professional Features & Benefits

  • Grade 1 cylindrical lockset per ANSI/BHMA A156.2 Series 4000, Grade 1
  • Lever Release™ design for vandal resistance — outside lever rotates freely when locked
  • EZ-Install components significantly reduce installation time
  • Independent return springs prevent lever sag
  • 4 solid cast lever options (Armstrong, Newport, Princeton, Frascati)
  • Anti-rotational through-bolts at 6 and 12 o'clock positions
  • Accommodates 6 or 7-pin conventional cylinders and all keying levels
  • CL3352 Classroom Intruder function: double-cylinder lockset, always-free egress
  • Available with MicroShield® antimicrobial coating (suffix option code "C")
  • CL33900 electrified option: fail safe and fail secure, 12 or 24VAC/VDC
  • ElectroLynx® 8-pin connector on all electrified products
  • Seven-year limited warranty (two-year for electrified)

Technical Specifications

  • Grade: ANSI/BHMA A156.2 Series 4000, Grade 1
  • Handing: Non-handed (except FZD trim)
  • Door Thickness: 1-3/4" (44mm) 2" (51mm) standard; optional over 2" 2-1/4" (57mm)
  • Backset: 2-3/4" (70mm) standard; optional 3-3/4" (95mm) and 5" (127mm)
  • Latchbolt: Stainless steel, 1/2" (13mm) throw; optional 3/4" (19mm) fire latch
  • Auxiliary Latchbolt: Deadlocking — prevents manipulation when door is closed
  • Lock Chassis: Steel, zinc dichromated for corrosion resistance
  • Front: Wrought brass, bronze, or stainless steel, 2-1/4" x 1-1/8"
  • Strike: Wrought brass or stainless steel ANSI curved lip, 4-7/8" x 1-1/4" x 1-1/4" lip to center
  • Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
  • Electrified Voltage: 12VAC/DC or 24VAC/DC (CL33900 Series)
  • Electrified Current: 250mA @ 12VAC/VDC; 150mA @ 24VAC/VDC, continuous duty solenoid
  • Certifications: ANSI/BHMA A156.2 Grade 1; UL-cUL listed; ANSI A117.1 Accessibility; California State Fire Marshal
  • Warranty: Seven-year limited (two-year for CL33900 electrified)

Professional Applications

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

Why Choose Corbin Russwin Quality?

Corbin Russwin door hardware components are manufactured to exacting commercial-grade standards, ensuring reliable performance and precise fit within the CL3300 Series hardware family. This genuine inside spring housing replacement supports the long-term serviceability of Corbin Russwin installations, minimizing downtime and maintaining the integrity of the original hardware assembly. Engineered for demanding commercial applications where dependable performance and proper component fit are essential.

Manufacturer Resources

Corbin Russwin Condensed Catalog

Product Specs

Product Group:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Inside Spring Housing
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Product Attribute:
Parts and Accessories
Department:
Door Hardware

Corbin Russwin 37.47 – Frequently Asked Questions

1) Will the Corbin Russwin 783F308 spring housing work on a 2 inch thick door?
Yes. The 783F308 inside spring housing covers door thicknesses from 1-3/4 inch up to 2 inch, which is the standard range on CL3300 Series cylindrical locks. If the door is thicker than 2 inch, up to 2-1/4 inch, that is an optional configuration on the CL3300 and takes different thickness-specific parts, so the 783F308 is not the right housing for it.
2) What does the inside spring housing actually do on a CL3300 lockset?
It is the interior-side housing that carries the return spring for the lever. On the CL3300 Series each lever runs an independent return spring so the lever comes back level instead of sagging over time. When an inside lever starts to droop or feels sloppy, the spring housing is the part that gets replaced, not the whole chassis.
3) Is the 783F308 the inside or outside spring housing, and does it matter which one I order?
This is the inside housing, for the interior lever side of the opening. Inside and outside housings are not interchangeable on the CL3300 Series, so if the sagging or broken lever is on the exterior side of the door you need the outside housing instead. The CL3300 chassis itself is non-handed, except for FZD trim, so there is no left or right hand version of this part to worry about, just inside versus outside.
4) Will this part fit a Corbin Russwin lever lock other than the CL3300?
No. The 783F308 is built for the CL3300 Series cylindrical lockset only. Corbin Russwin mortise locks and other cylindrical families use different internal trim components. Check the chassis or the existing lock face for the CL33xx designation before ordering.
5) Do I need to know my backset before ordering CL3300 replacement parts?
Not for the spring housing itself, which is driven by door thickness rather than backset. Backset matters when you are replacing the latch: CL3300 Series locks run a 2-3/4 inch backset as standard, with 3-3/4 inch and 5 inch available as options. Measure from the door edge to the center of the bore before you order any latch components.
6) Is the CL3300 Series Grade 1, and does replacing the spring housing affect its fire or code status?
The CL3300 Series is certified to ANSI/BHMA A156.2 Series 4000, Grade 1, is UL-cUL listed, meets ANSI A117.1 accessibility, and carries California State Fire Marshal listing. Using the genuine Corbin Russwin inside spring housing keeps the assembly as-listed. Substituting a non-OEM part on a labeled opening is what puts the listing at risk.
7) My CL3300 is on a fire door with a 3/4 inch latch throw. Does that change which spring housing I need?
No. The optional 3/4 inch fire latch replaces the standard 1/2 inch stainless steel latchbolt in the chassis; it has no bearing on the inside spring housing. The housing selection comes down to door thickness, 1-3/4 inch to 2 inch for the 783F308.
8) Can I service a CL3300 lock in the door, or does the whole lock have to come off?
CL3300 Series locks use EZ-Install components and anti-rotational through-bolts at the 6 and 12 o'clock positions, so trim comes off from the inside face without pulling the chassis out of the bore in most cases. Have the through-bolts and a screwdriver ready; the housing seats behind the inside rose.
9) Does this spring housing work on an electrified CL33900 lock too?
The CL33900 electrified option is built on the same CL3300 platform, available fail safe or fail secure at 12 or 24VAC/VDC with an ElectroLynx 8-pin connector. The electrified solenoid lives in the chassis, not the spring housing, so the inside trim hardware follows the same 1-3/4 inch to 2 inch door thickness rule. On an electrified opening, verify the wiring harness is clear of the trim before reassembling.
How fast can I get the Corbin Russwin 37.47 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 Corbin Russwin 37.47 come with a warranty?
Absolutely. The Corbin Russwin 37.47 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 Corbin Russwin 37.47?
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 Corbin Russwin 37.47 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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