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Square Head Machine Bolts

Sometimes referred to as "crossarm" bolts or "through" bolts, Hubbell Power Systems (HPS) square head and hex head machine bolts are manufactured to HPS specifications that meet the requirements of ANSI C135.1 and are available in a range of thread diameters and lengths. The head is marked with an identifying "C" and the bolt includes an assembled square or hex nut that corresponds to the head shape. Threads are formed with the rolled thread process. Bolt length is measured from the underside of the head to the last thread. Semi-cone point comes on bolts 8" and longer in 1/2", 5/8" and 3/4" diameters. All others have chamfered or rounded ends. For lengths not shown, contact HPS Customer Service.

3/8" Thread Dia. (3/8-16 UNC)
4,250 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
8602 2" 1" 0.11 lbs
8603 3" 0.13 lbs
8604 4" 3" 0.15 lbs
860412# 4-1/2" 0.17 lbs.
8605# 5" 0.18 lbs.
860512 5-1/2" 0.19 lbs.
T2060412# 6" 0.21 lbs.
8607 7" 0.24 lbs.
8608 8" 4" 0.27 lbs.
8610 10" 0.32 lbs.
1/2" Thread Diameter (1/2-13UNC)
7,800 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
8702 2' 1 1/4" 0.21 lbs.
870212 2 1/2" 0.24 lbs.
8703 3" 0.27 lbs.
8704 4" 3" 0.31 lbs.
870412*# 4 1/2" 0.33 lbs.
8705* 5" 0.35 lbs.
8706*# 6" 0.40 lbs.
8707* 7" 0.48 lbs.
8708*# 8" 4" 0.49 lbs.
8709* 9" 0.57 lbs.
8710*# 10" 0.60 lbs.
8712*# 12" 0.71 lbs.
8714* 14" 6" 0.73 lbs.
DF2B16 16" 0.82 lbs.
5/8" Thread Diameter (5/8-11UNC)
12,400 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
8802 2" 1 1/2" 0.36 lbs.
880212 2 1/2" 2 1/4" 0.39 lbs.
PS8803 3" 2 3/4" 0.48 lbs.
8804 4" 3" 0.57 lbs.
8805 5" 0.60 lbs.
8806*# 6" 0.69 lbs.
8807*# 7" 4" 0.75 lbs.
8808*# 8" 0.78 lbs.
8809* 9" 0.88 lbs.
8810*# 10" 6" 0.93 lbs.
8812*# 12" 1.08 lbs.
8814*# 14" 1.23 lbs.
8816*# 16" 1.40 lbs.
8818*# 18" 1.54 lbs.
8820* 20" 1.71 lbs.
8822* 22" 1.76 lbs.
8824* 24" 196 lbs.
8826 26" 2.15 lbs.
8828 28" 2.31 lbs.
3/4" Thread Diameter (3/4-10UNC)
18,350 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
PS8902 2" 1-3/4" 0.65 lbs.
PS8903 3" 0.75 lbs.
PS8906 6" 3" 1.09 lbs.
PS8907* 7" 1.18 lbs.
8908*# 8" 4" 1.26 lbs.
8910*# 10" 1.54 lbs.
8912*# 12" 6" 1.62 lbs.
8914*# 14" 1.88 lbs.
8916*# 16" 2.25 lbs.
8918*# 18" 2.32 lbs.
8920* 20" 2.52 lbs.
8922* 22" 2.68 lbs.
8924* 24" 3.04 lbs.
8926* 26" 3.08 lbs.
8928 28" 3.23 lbs.
8930 30" 8" 3.46 lbs.
8932 32" 3.69 lbs.
7/8" Thread Diameter (7/8-9UNC)
24,500 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
PSSB780250 2 1/2" 2' 0.90 lbs.
PSSB780400 4" 1.15 lbs.
PSSB780500 5" 2 1/2" 1.30 lbs.
PSSB780600* 6" 1.44 lbs.
PSSB780800*# 8" 3" 1.76 lbs.
PSSB781000*# 10" 6" 2.08 lbs.
DF5B12*# 12" 2.40 lbs.
C2050254*# 14" 2.84 lbs.
C2050255*# 16" 3.16 lbs.
C2050256*# 18" 3.52 lbs.
C2050257* 20" 3.90 lbs.
C2050258* 22" 4.25 lbs.
DF5B24* 24" 4.30 lbs.
PSSB782600* 26" 8" 4.62 lbs.
PSSB782800* 28" 4.94 lbs.
PSSB783000 30" 5.27 lbs.
PSSB783200 32" 5.61 lbs.
1" Thread Diameter (1-8UNC)
33,500 lbs. Rated Tensile Strength
Catalog Number Length Minimum
Thread Length
Approx. Ship
Wt. per Each
PSSB100350 3-1/2" 2-1/2" 1.48 lbs.
PSSB100400 4" 3" 1.58 lbs.
PSSB100500 5" 1.79 lbs.
PSSB100600 6" 2.01 lbs.
PSSB100800# 8" 4" 2.43 lbs.
PSSB101000# 10" 2.85 lbs.
PSSB101200# 12" 6" 3.27 lbs.
PSSB101400# 14" 3.69 lbs.
PSSB101600# 16" 4.12 lbs.
PSSB101800# 18" 4.54 lbs.
PSSB102000 20" 4.96 lbs.
PSSB102200 22" 5.38 lbs.
PSSB102400 24" 5.81 lbs.
PSSB102600 26" 6.24 lbs.
PSSB102800 28" 8" 6.67 lbs.
PSSB103000 30" 7.10 lbs.
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