SP51 (ANSI A5112)
Stainless Steel-Polished and Satin Finish
•Spring hinge door closer Model K8107/
K5107 passed a 1,000,000 cycle UL
test in accordance with Underwriters
Laboratories for door closers, with or
without integral smoke detectors.
•Both models comply and meet ANSI/BHMA
specifications for ANSI/BHMA A156.17
Grade 1 and bear U.L.’s listing mark.
•All hinges are ANSI template.
GENERAL PRODUCT INFORMATION: PBB, Inc. template
hinges are manufactured to close tolerances and meet all
specifications and requirements set by the American National
Standards Institute (ANSI).
HINGE SWAGING: A standard swaging of our standard weight
full mortise hinge when closed to parallel position provides a
1/16” clearance between leaves.

Maximum Door Size
For labeled doors 3’ x 7’ the maximum door size is based
on the limits set forth by NFPA Standard #80. Labeled
doors require Ball Bearing hinges.
For non-labeled doors 4’0” wide 4” x 4” Spring hinges are
not recommended. For non-labeled doors over 7’6” in
height, use an additional hinge for each additional 30” of
height or fraction thereof.
NOTES:
1.For complete warranty protection use all spring hinges or
a combination of spring hinges and ball bearing hinges.
Do not use plain bearing hinges as this voids all factory
warranties.
2.Use of gasket for smoke or sound .protection, wind
condition or unbalanced air pressure may prevent door
from latching. Additional closing power would be required.
See installation instruction sheet.

SERIES SIZE RECOMMENDED MAX
DOOR WEIGHT (LBS.)
FOR USE ON 1 3/4” DOOR
SP81  4 1/2” x 4 1/2”
SPRING HINGE:
70 lbs.-1 hinge
100 lbs.- 2 hinges
150 lbs.- 3 hinges
BUTT HINGE:
70 lbs.-2 hinge
100 lbs.- 3 hinges

MATERIAL GAUGE: .134 ± .005 for 4-1/2” x 4-1/2”