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Turnbuckles

HARDWARE FITTINGS
FORGED STEEL
TURNBUCKLES
FORGED STEEL
TB

Turnbuckles are used as adjustable extension links to maintain proper tower clearance on assemblies at tower end.

Jaw ends are supplied with bolt, nut, and humpback cotter pin.

Material: Galvanized forged steel
Note:

When ordering replace XX with Type in Cat. No. Example: TB34JJ6BNK for jaw-jaw end fittings with 6" take up.

BNK suffix not valid for Type EE turnbuckles.

Add "LN" suffix if jam nuts are required. (1)

CATALOG NUMBER DIAMETER &
TAKE UP-IN. (MM)		 CLOSED COUPLING LENGTH – IN. (MM) WT. EACH-POUNDS (KG)
TYPE JJ TYPE EE TYPE JE EYE-EYE JAW-EYE JAW-JAW
TB34XX6BNK 3/4 X 6
(19.1) (152.4)		 15.1
(384)		 17.2
(437)		 16.2
(411)		 3.89
(1.75)		 3.87
(1.74)		 4.11
(1.85)
TB34XX12BNK 12
(304.8)		 21.5
(546)		 23.6
(599)		 22.6
(574)		 5.43
(2.44)		 5.36
(2.41)		 5.65
(2.54)
TB34XX18BNK 18
(457.2)		 27.5
(699)		 29.6
(752)		 28.6
(726)		 7.25
(3.26)		 7.00
(3.15)		 7.00
(3.15)
TB78XX12BNK 7/8 X 12
(22.2) (304.8)		 22.7
(577)		 24.7
(627)		 23.7
(602)		 8.1
(3.65)		 8.00
(3.6)		 8.17
(3.68)
TB78XX18BNK 18
(457.2)		 29.1
(739)		 31.2
(792)		 30.2
(767)		 9.25
(4.16)		 9.75
(4.39)		 9.13
(4.11)
TB1XX6BNK 1 X 6
(25.4) (152.4)		 17.8
(452)		 20.2
(513)		 19.0
(483)		 9.33
(4.2)		 8.92
(4.01)		 9.75
(4.39)
TB1XX12BNK 12
(304.8)		 23.8
(605)		 26.2
(665)		 25.0
(635)		 11.93
(5.37)		 11.20
(5.04)		 12.00
(5.40)
TB1XX18BNK 18
(457.2)		 29.8
(757)		 32.2
(818)		 31.0
(787)		 14.00
(6.30)		 13.30
(6.00)		 14.00
(6.30)
TB1XX24BNK 24
(609.6)		 36.4
(925)		 38.8
(986)		 37.6
(955)		 17.25
(7.76)		 17.00
(7.65)		 17.00
(7.65)
TB114XX12BNK 1-1/4 X 12
(31.8) (304.8)		 27.4
(696)		 30.1
(765)		 28.8
(732)		 16.50
(7.43)		 20.00
(9.0)		 21.50
(9.68)
TB114XX18BNK 18
(457.2)		 33.4
(848)		 36.1
(917)		 34.8
(884)		 23.00
(10.35)		 24.18
(10.88)		 24.25
(10.91)
TB114XX24BNK 24
(609.6)		 39.9
(1013)		 42.7
(1085)		 41.3
(1049)		 24.00
(10.80)		 28.40
(12.78)		 28.00
(12.60)
TB112XX12BNK 1-1/2 X 12
(38.1) (304.8)		 28.8
(732)		 32.2
(818)		 30.5
(775)		 27.50
(12.4)		 28.99
(13.05)		 30.05
(13.52)
TB112XX18BNK 18
(457.2)		 37.8
(960)		 38.2
(970)		 36.5
(927)		 31.00
(13.95)		 35.00
(15.75)		 36.75
(16.54)
TB112XX24BNK 24
(609.6)		 41.4
(1052)		 44.9
(1140)		 43.1
(1095)		 37.50
(16.88)		 39.18
(17.63)		 40.67
(18.36)
  • (1) Locking Nuts add cost and lead time and may provide no benefit under the typical constant-tension, overhead line, utility application. The torque required to rotate the boss of a turnbuckle under tension can be calculated by the formula:
  • T = 2(kdW/12) ft-lbs.
  • Where: k = Friction factor (0.16)
  • d = Nominal thread diameter (inches)
  • W = Applied tension load (lbs)
  • Example:
  • 3/4 turnbuckle under 4,000 lb tension
  • T = 2(0.16 x 0.75 x 4,000/12) = 80 ft-lbs.
DIMENSIONS INCHES (MM) ULT. STR.
RATING-BS.
(KN)
A B C D E F G H
3/4
(19.1)		 1-1/2
(38.1)		 5/8
(15.9)		 15/16
(23.8)		 9/16
(14.3)		 1-9/32
(32.5)		 4-1/8
(104.8)		 1-5/8
(41.3)		 26,000
(116)
7/8
(22.2)		 1-3/4
(44.5)		 3/4
(19.1)		 1-1/8
(28.6)		 11/16
(17.5)		 1-15/32
(37.3)		 4-27/32
(123)		 1-7/8
(47.6)		 36,000
(160)
1
(25.4)		 2-1/16
(52.8)		 7/8
(22.2)		 1-3/16
(30.2)		 25/32
(19.8)		 1-21/32
(42.1)		 5-17/32
(140.5)		 2-1/8
(54)		 50,000
(222)
1-1/4
(31.8)		 2-13/16
(71.4)		 1-1/8
(28.6)		 1-3/4
(44.5)		 1
(25.4)		 2-3/32
(53.2)		 7-3/16
(182.6)		 2-5/8
(66.7)		 76,000
(338)
1-1/2
(38.1)		 2-13/16
(71.4)		 1-3/8
(34.9)		 2-1/16
(52.8)		 1-1/16
(27)		 2-15/32
(64.3)		 7-7/8
(200)		 3-1/8
(79.4)		 107,000
(476)
DIMENSIONS INCHES (MM) ULT. STR.
RATING-BS.
(KN)
A B C D E
3/4
(19.1)		 1
(25.4)		 5/8
(15.9)		 2-1/8
(54)		 4-11/16
(119.1)		 26,000
(116)
7/8
(22.2)		 1-1/4
(31.8)		 3/4
(19.1)		 2-3/8
(60.3)		 5-1/4
(133.4)		 36,000
(160)
1
(25.4)		 1-7/16
(36.5)		 7/8
(22.2)		 3
(76.2)		 6-3/8
(161.9)		 50,000
(222)
1-1/4
(31.8)		 1-13/16
(46)		 1-1/8
(28.6)		 3-9/16
(90.5)		 7-3/4
(196.9)		 76,000
(338)
1-1/2
(38.1)		 2-1/8
(54)		 1-1/4
(31.8)		 4-1/8
(104.8)		 8-5/8
(219.1)		 107,000
(476)
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