Bommer LB4390C-450-630

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Bommer LB4390C-450-630 4.5x4.5in Single Acting Spring Hinge-Full Mortise-Contract Grade-Lube Bearing-Stainless Steel Base-Satin Finish

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Bommer LB4390C-450-630 4.5x4.5in Single Acting Spring Hinge-Full Mortise-Contract Grade-Lube Bearing-Stainless Steel Base-Satin Finish
Main ImageVideo Review Bommer LB4390C 450 630
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Price: $101.01 USD
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Technical Support
Product Description:

bommer logo 4-1/2" x 4-1/2" Full Mortise Lube Bearing Stainless Steel Spring Hinge - Satin Stainless Steel

  • Full Mortise
  • Contract Grade
  • ANSI K51071F
  • UL Listed for fire door applications
  • BHMA certified Grade 1 for one million cycles
  • Non-handed
  • Self lubricating bearings
  • Easily adjustable spring tension
  • ANSI templated screw hole pattern
  • Pivot point aligns with commercial butt hinges gauge .123 to .134
  • Material: Stainless Steel
  • Corners: Square
  • Gauge: .134
  • Number of Holes: 8
  • Screw Size (and Quantity Per Hinge)
    • Wood: #10 x 3/4" (8)
    • Machine: #10-24 x 1/2" (8)
  • Recommended Maximum Labeled Door Size: 3' Wide by 7' High
  • Recommended Maximum Door Weight:
    • 115 lbs with two spring hinges and one butt hinge
    • 150 lbs with three spring hinges
  • Replacement Bommer Tension Pin: F87464
  • Replacement Bommer Tension Rod: F0910
  • Note: Specifications of product shown may be different than the one being sold. Read description thoroughly.
  • Security Lock UID: BOM100LB4390C450630
Single Acting Spring Hinge
Questions and Answers
Q: iS YOUR PRICING PER HINGE OR PER PAIR
A: These hinges are sold and priced as Each.

Please contact our sales department here:

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If we can assist you with entering this order and please let us know if there is anything else we can help with.

Q: Is it possible to weld 2 self-closing hinges together and create a double action hinge? The door weight Appx 60-70 lbs
A: I am tempted to say yes (although you are out there on your own type situation as far as the hinge manufacturer is concerned - LOL).

This is a single acting spring hinge in stainless steel:

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And the technical drawing is here:

Download File

Take note of the swag on the hinge leaf. This will not allow your hinge to sit flush on the cased jamb and when stacking them together in this way will cause your margin between the hinge jamb and the door stile to be approx. 1"

We cannot do the welding here but am tempted to say with 3 - hinges made in this fashion, you might have a reasonable solution.

Q: What is the spring made from on this hinge?
A: The spring is not stainless steel – it is however a coated steel spring. Coated with GEOMET as defined here:

The GEOMET® product range is a standard worldwide reference for industries requiring high performance thin layer anticorrosion systems. GEOMET® products are completely chrome-free and capable of protecting a wide variety of metallic surfaces. The coatings are well suited for protecting both large and small parts, having either simple or complex geometry. In particular GEOMET® coatings are a worldwide standard for use on fasteners.*

Is there a follow up question that we can perhaps attempt to answer? We take pride deep in our technical expertise, as we know it separates us from our competition, so don't hesitate to ask.

Please reply to this email or contact our sales department here:

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if we can assist you by answering further questions or with entering this order and please let us know if there is anything else we can help with.

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