Turnbuckle Connection System

Turnbuckle Set 3-Sizes
Turnbuckle Set
Turnbuckle Pigtail Anchor
Turnbuckle Recess Units
Turnbuckle Teaser

Designed for permanent connection of prefabricated concrete sections. These innovative Turnbuckles are part of a quick, effective, dependable connection system using anchors and screw connections embedded in prefabricated concrete. No grouting necessary. Once properly placed, immediately capable of supporting high shearing tensile full loads.


  • Quick, effective, dependable connection of prefabricated concrete sections
  • No waiting for expensive welders
  • Built in magnets simplify placement of the recess unit
  • Concrete sections can be clamped without additional materials or special products
  • Weather resistant, can be installed at temperatures below zero degrees
  • Resistant to tensile and shear force
  • Cost and time savings through reduced assembly and connection times.
  • No need for time-consuming individual solutions
  • Engineering Approval No. Z-14.4-599

Turnbuckle Housings

Sylvan Part Number Description Tensile Force Lateral Force Length(a) Length(a1) Breadth(b) Breadth(b1) Height
BT.4009082.M12ST M12 – 1/2” Turnbuckle Housing (Galv. Steel hot-dip) 7,576 lbs. 2,100 lbs. 2.65” 1.00” 2.65” .62” 2.00”
BT.4009076.M16ST M16 – 5/8” Turnbuckle Housing (Galv. Steel hot-dip) 9,700 lbs. 5,889 lbs. 3.54” 1.18” 3.54” .70” 2.55”
BT.4009075.M20ST M20 – 3/4" Turnbuckle Housing (Galv. Steel hot-dip) 11,700 lbs. 5,575 lbs. 4.72” 1.58” 4.72” .86 3.54”

Turnbuckle Sets

Sylvan Part Number Description
BT.4009086.M12SET M12 – 1/2" Turnbuckle Set*
BT.4009074.M16SET M16 – 5/8” Turnbuckle Set*
BT.4009072.M20SET M20 – 3/4" Turnbuckle Set*

* Set Includes:
1 pc. Turnbuckle Housing
2 pc. Galvanized Hex bolts
2 pc. Galvanized fitted washers

Turnbuckle Accessories

Sylvan Part Number Description Notes
BT.3003163.M12AN M12 Threaded Pigtail Anchor (1/2” diam. x 4-1/3” long; 12mm diam. x 110mm long)
BT.3003067.M16AN M16 Threaded Pigtail Anchor (5/8” diam. x 6-7/8” long; 16mm diam. x 175mm long)
BT.3003064.M20AN M20 Threaded Pigtail Anchor (3/4” diam. x 7-5/8” long; 20mm diam. x 194mm long)

PDFTurnbuckle Technical Data Sheet


PDFTurnbuckle Installation Instructions


PDFTurnbuckle Recess Units and Accessories