PBB, Inc. - World Class Hinges 800-726-3414 [email protected]
Templates: BB35 | BB40 | BB45 | BB50 | BB60

BB81 – Five Knuckle Ball Bearing Hinge

Standard Weight: 
3.5″ x 3.5″
4.0″ x 4.0″
4.5″ x 4.0″
4.5″ x 4.5″
5.0″ x 4.0″
5.0″ x 4.5″
5.0″ x 5.0″
6.0″ x 4.5″
6.0″ x 5.0″
6.0″ x 6.0″

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.

BB81 – 3.5″ x 3.5″ or 4″ x 4″

  • For use on medium weight doors or doors requiring average frequency service.
  • Ball bearing hinges must be used on doors in conjuction with door closers and on all fire rated openings.
  • For hospital type, add HT to suffix of part number.
  • 3-1/2, 4” available in square, 5/8”, 1/4” Radius Round Corners.
  • All hinges are ANSI template.

BB81 – 4.5″ x 4″ or 4.5″ x 4.5″

  • For use on medium weight doors or doors requiring average frequency service.
  • Ball bearing hinges must be used on doors in conjuction with door closers and on all fire rated openings.
  • For hospital type, add HT to suffix of part number.
  • All hinges are ANSI template.

BB81 – 5″ x 4″ or 5″ x 4.5″ or 5″ x 5″

  • For use on medium weight doors or doors requiring low frequency service.
  • Not for use with door closer.
  • For hospital type, add HT to suffix of part number.
  • All hinges are ANSI template.

BB81 – 6″ x 4.5″ or 6″ x 5″ or 6″ x 6″

  • For use on medium weight doors or doors requiring average frequency service.
  • Ball bearing hinges must be used on doors in conjuction with door closers and on all fire rated openings.
  • For hospital type, add HT to suffix of part number.
  • All hinges are ANSI template.

BB81: Available Materials

BB81 (ANSI A8112)
Steel-Polished and Plated or Bonderized and Prime Coated for Painting
BB21 (ANSI A2112)
Brass-Polished and Plated
BB51 (ANSI A5112)
Stainless Steel-Polished and Satin Finish

BB81 – 3.5″ x 3.5″ or 4″ x 4″: Product Specifications

MATERIAL GAUGE:
.123 ± .005 for 3-1/2” x 3-1/2”
.130 ± .005 for 4” x 4”
HEIGHT OF HINGE:
3.50 (+.000/-.015) for 3-1/2” x 3-1/2”
4.00 (+.000/-.015) for 4” x 4”
WIDTH:
3.50 ± .015 for 3-1/2” x 3-1/2”
4.00 ± .015 for 4” x 4”
3.5” STANDARD SCREW SIZE
FHMS – 10-24 x 1/2”
FHWS – 10 x 1”
4” STANDARD SCREW SIZE
FHMS – 12-24 x 1/2”
FHWS – 12 x 1-1/4”
PACKAGING INFORMATION:
One hinge per plastic bag, 3 hinges and 1 screw pack per unit carton.
16 unit carton or 48 hinges per master shipping carton.
1 screw pack includes all machine screws (24), and 1/2 wood screws (12). ATMS & AWS also available.
For 3-1/2 x 3-1/2, 1 screw pack includes (18) machine screws and (18) wood screws.

BB81 – 4.5″ x 4″ or 4.5″ x 4.5″: Product Specifications

MATERIAL GAUGE:
.134 ± .005 for 4-1/2” x 4”
.134 ± .005 for 4-1/2” x 4-1/2”
HEIGHT OF HINGE:
4.50 (+.000/-.015) for 4-1/2” x 4”
4.50 (+.000/-.015) for 4 1/2” x 4-1/2”
WIDTH:
4.00 ± .015 for 4-1/2” x 4”
4.50 ± .015 for 4-1/2” x 4-1/2″
4.5” STANDARD SCREW SIZE
FHMS – 12-24 x 1/2”
FHWS – 12 x 1-1/4”
PACKAGING INFORMATION:
One hinge per plastic bag, 3 hinges and 1 screw pack per unit carton.
16 unit carton or 48 hinges per master shipping carton.
1 screw pack includes all machine screws (24), and 1/2 wood screws (12). ATMS & AWS also available.

BB81 – 5″ x 4″ or 5″ x 4.5″ or 5″ x 5″: Product Specifications

MATERIAL GAUGE:
.146 ± .005 for 5” x 4”
.146 ± .005 for 5” x 4-1/2”
.146 ± .005 for 5” x 5”
HEIGHT OF HINGE:
5.00 (+.000/-.015) for 5” x 4”
5.00 (+.000/-.015) for 5” x 4-1/2”
5.00 (+.000/-.015) for 5” x 5”
WIDTH:
4.00 ± .015 for 5” x 4”
4.50 ± .015 for 5” x 4-1/2”
5.00 ± .015 for 5″ x 5”
5” STANDARD SCREW SIZE
FHMS – 12-24 x 1/2”
FHWS – 12 x 1-1/4”
PACKAGING INFORMATION:
One hinge per plastic bag, 3 hinges and 1 screw pack per unit carton.
12 unit carton or 36 hinges per master shipping carton.
1 screw pack includes all machine screws (24), and 1/2 wood screws (12). ATMS & AWS also available.

BB81 – 6″ x 4.5″ or 6″ x 5″ or 6″ x 6″: Product Specifications

MATERIAL GAUGE:
.160 ± .005 for 6” x 4-1/2”
.160 ± .005 for 6” x 5”
.160 ± .005 for 6” x 6”
HEIGHT OF HINGE:
6.00 (+.000/-.015) for 6” x 4-1/2”
6.00 (+.000/-.015) for 6” x 5”
6.00 (+.000/-.015) for 6” x 6″
WIDTH:
4.50 ± .015 for 6” x 4-1/2”
5.00 ± .015 for 6” x 5”
6.00 ± .015 for 6” x 6″
6” STANDARD SCREW SIZE
FHMS – 1/4-20 x 1/2”
FHWS – 14 x 1-1/2”
PACKAGING INFORMATION:
One hinge per plastic bag, 3 hinges and 1 screw pack per unit carton.
8 unit carton or 24 hinges per master shipping carton.
1 screw pack with all machine screws (30), and 1 screw pack with 1/2 wood screws (15). ATMS & AWS also available.