Mechanical Rock Bolts

Mechanical Rock Bolts

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Forged Head (1-1/8" Square)

Forged Head & Threaded

Nominal 5/8" and 3/4" sizes and 7/8"
Forged Head (1-1/8" Square)
DimensionsHead Type5/8" Bolt3/4" Bolt7/8" Bolt
Body Diameter EAll bolts±0.56" (±14.2mm)±0.68" (±17.3mm)±0.79" (±20.1mm)
Head Across Flats F1-1/8" Square
T-Dome		1.088" - 1.125" (27.64 - 28.58 mm)
0.906" - 0.938" (23.01 - 23.83 mm)		1.088" - 1.125" (27.64 - 28.58 mm)
0.906" - 0.938" (23.01 - 23.83 mm)		 
Head Across Corners G1-1/8" Square
T-Dome		1.425" - 1.591" (36.19 - 40.41 mm)
1.244" - 1.326" (31.60 - 33.68 mm)		1.425" - 1.591" (36.19 - 40.41 mm)
1.244" - 1.326" (31.60 - 33.68 mm)		 
Head Height H1-1/8" Square & T-Dome0.40" (10.16 mm)0.40" (10.16 mm) 
Thread Size (left and right) IAll Bolts5/8"- 11 UNC3/4"- 10 UNC7/8"-9 UNC

All dimensions in accordance with ASTM F432 & CSA M430-90 specifications

Technical Data
C1060 SteelC1060 SteelC1070C1070M
5/8" Bolt3/4" Bolt5/8" Bolt5/8" TBE Bolt
Yield Strength, min.13,600 lbs
(60 kN)		20,000 lbs
(89 kN)		17,100 lbs
(76 kN)		28,400 lbs
(126 kN)
Tensile Strength, min.22,600 lbs
(100 kN)		33,400 lbs
(148 kN)		31,200 lbs
(139 kN)		35,000 lbs
(156 kN)
Ultimate Axial StrainMinimum 12%Minimum 12%Minimum 8%Minimum 2.2%
Technical DataC1055 (A29)A29 (gr75 for USA)A29 (gr75 for USA)A29 (gr75 for USA)
5/8" Bolt5/8" Bolt3/4" Bolt7/8" Bolt
Yield Strength, min.15,600 lbs
(69 kN)		17,000 lbs
(75 kN)		25,100 lbs
(111 kN)		34,700 lbs
(154.3 kN)
Tensile Strength, min.24,000 lbs
(106 kN)		22,600 lbs
(100 kN)		33,400 lbs
(149 kN)		46,200 lbs
(205.5 kN)
Ultimate Axial StrainMinimum 10%Minimum 8%Minimum 8%Minimum 8%
All mechanical & physical properties in accordance with ASTM F432, ASTM A29 & CSA M430-90 specifications
5/8" steel special order

Threaded Both End (TBE)

Threaded Both End (TBE)
DSI Underground Canada Ltd.

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