B7 Heavy Hex Bolt
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B7 Heavy Hex Bolt

ASTM A193 Grade B7 heavy hex head bolts are high strength fasteners manufactured from heat treated alloy steel AISI 4140/4142, quenched and tempered. Dimensional specifications are governed by ASME B18.2.1. Grade markings consists of both the grade symbol "B7" and the manufacturer's identification mark. Inch series fasteners meeting ASTM A193 Grade B7 specifications are typically used in flange bolting applications. ASTM A193 covers the requirements for high temperature and high pressure bolting. Heavy hex head bolts have a larger head to increase the bearing surface and distribute the clamping load over a larger area. Bolts listed that are smaller than 1/2" diameter may be finished pattern bolts. A193 B7 hex bolts, as well as all thread stud bolts having diameters above 1" are most common 8UN (8 threads per inch) and are also available UNC (coarse thread).

B7 Heavy Hex Bolt
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Diameter Thread Pitch Length Threading Item # Availability Price Quantity UOM
1/4 20 3/4 Full HHB70250075-I In Stock $0.48749/EA EA
1/4 20 1 Full HHB70250100-I In Stock $0.55249/EA EA
1/4 20 1 1/4 Partial HHB70250125-I In Stock $0.64998/EA EA
1/4 20 1 1/2 Partial HHB70250150-I In Stock $0.74748/EA EA
1/4 20 2 Partial HHB70250200-I In Stock $0.84498/EA EA
5/16 18 1 Full HHB70310100-I In Stock $0.69548/EA EA
5/16 18 1 1/4 Full HHB70310125-I In Stock $0.87748/EA EA
3/8 16 1 Full HHB70370100-I In Stock $0.58794/EA EA
3/8 16 1 1/4 Full HHB70370125-I In Stock $0.58164/EA EA
3/8 16 1 1/2 Partial HHB70370150-I In Stock $1.29587/EA EA
3/8 16 1 3/4 Partial HHB70370175-I In Stock $0.90907/EA EA
3/8 16 2 Partial HHB70370200-I In Stock $0.93997/EA EA
1/2 13 1 Full HHB70500100-I In Stock $0.7014/EA EA
1/2 13 1 1/4 Full HHB70500125-I In Stock $0.4338/EA EA
1/2 13 1 1/2 Full HHB70500150-I In Stock $0.59945/EA EA
1/2 13 1 3/4 Full HHB70500175-I In Stock $0.95193/EA EA
1/2 13 2 Partial HHB70500200-I In Stock $0.98336/EA EA
1/2 13 2 1/4 Partial HHB70500225-I In Stock $1.05853/EA EA
1/2 13 2 1/2 Partial HHB70500250-I In Stock $1.09045/EA EA
1/2 13 2 3/4 Partial HHB70500275-I In Stock $1.27104/EA EA
1/2 13 3 Partial HHB70500300-I In Stock $1.75011/EA EA
1/2 13 3 1/4 Partial HHB70500325-I In Stock $1.0573/EA EA
1/2 13 3 1/2 Partial HHB70500350-I In Stock $1.26968/EA EA
1/2 13 3 3/4 Partial HHB70500375-I 3-5 Working Days $1.62496/EA EA
1/2 13 4 Partial HHB70500400-I In Stock $1.12541/EA EA
1/2 13 4 1/2 Partial HHB70500450-I In Stock $2.30809/EA EA
1/2 13 5 Partial HHB70500500-I 3-5 Working Days $1.73565/EA EA
5/8 11 1 Full HHB70620100-I In Stock $0.9105/EA EA
5/8 11 1 1/4 Full HHB70620125-I In Stock $1.07936/EA EA
5/8 11 1 1/2 Full HHB70620150-I In Stock $1.05327/EA EA
5/8 11 1 3/4 Full HHB70620175-I In Stock $1.99379/EA EA
5/8 11 2 Full HHB70620200-I In Stock $1.51661/EA EA
5/8 11 2 1/4 Partial HHB70620225-I In Stock $1.13152/EA EA
5/8 11 2 1/2 Partial HHB70620250-I In Stock $1.63435/EA EA
5/8 11 2 3/4 Partial HHB70620275-I In Stock $1.6819/EA EA
5/8 11 3 Partial HHB70620300-I In Stock $2.11079/EA EA
5/8 11 3 1/4 Partial HHB70620325-I In Stock $1.19649/EA EA
5/8 11 3 1/2 Partial HHB70620350-I In Stock $1.27842/EA EA
5/8 11 3 3/4 Partial HHB70620375-I In Stock $1.79168/EA EA
5/8 11 4 Partial HHB70620400-I In Stock $1.65778/EA EA
5/8 11 4 1/2 Partial HHB70620450-I In Stock $3.30998/EA EA
5/8 11 5 Partial HHB70620500-I In Stock $2.31076/EA EA
5/8 11 5 1/2 Partial HHB70620550-I In Stock $4.80582/EA EA
5/8 11 6 Partial HHB70620600-I In Stock $4.14108/EA EA
3/4 10 1 1/2 Full HHB70750150-I In Stock $2.06705/EA EA
3/4 10 1 3/4 Full HHB70750175-I In Stock $1.89233/EA EA
3/4 10 2 Full HHB70750200-I In Stock $2.78908/EA EA
3/4 10 2 1/4 Full HHB70750225-I In Stock $2.50078/EA EA
3/4 10 2 1/2 Full HHB70750250-I In Stock $2.63611/EA EA
3/4 10 2 3/4 Partial HHB70750275-I In Stock $2.98645/EA EA
3/4 10 3 Partial HHB70750300-I In Stock $2.79467/EA EA
3/4 10 3 1/4 Partial HHB70750325-I In Stock $2.64677/EA EA
3/4 10 3 1/2 Partial HHB70750350-I In Stock $2.88304/EA EA
3/4 10 3 3/4 Partial HHB70750375-I In Stock $2.93299/EA EA
3/4 10 4 Partial HHB70750400-I In Stock $3.36243/EA EA
3/4 10 4 1/2 Partial HHB70750450-I In Stock $3.53006/EA EA
3/4 10 5 Partial HHB70750500-I 3-5 Working Days $4.35853/EA EA
3/4 10 5 1/2 Partial HHB70750550-I In Stock $4.1443/EA EA
3/4 10 6 Partial HHB70750600-I In Stock $4.42476/EA EA
3/4 10 6 1/2 Partial HHB70750650-I In Stock $5.51765/EA EA
7/8 9 2 Full HHB70870200-I In Stock $2.79308/EA EA
7/8 9 2 1/4 Full HHB70870225-I In Stock $3.08755/EA EA
7/8 9 2 1/2 Full HHB70870250-I In Stock $3.63113/EA EA
7/8 9 2 3/4 Full HHB70870275-I In Stock $4.33045/EA EA
7/8 9 3 Partial HHB70870300-I In Stock $3.68213/EA EA
7/8 9 3 1/2 Partial HHB70870350-I In Stock $3.74228/EA EA
7/8 9 3 3/4 Partial HHB70870375-I In Stock $3.62642/EA EA
7/8 9 4 Partial HHB70870400-I In Stock $4.13299/EA EA
7/8 9 4 1/4 Partial HHB70870425-I In Stock $5.06422/EA EA
7/8 9 4 1/2 Partial HHB70870450-I In Stock $5.49149/EA EA
7/8 9 4 3/4 Partial HHB70870475-I In Stock $4.84238/EA EA
7/8 9 5 Partial HHB70870500-I In Stock $4.67988/EA EA
7/8 9 5 1/2 Partial HHB70870550-I In Stock $5.49282/EA EA
7/8 9 6 Partial HHB70870600-I 3-5 Working Days $18.23204/EA EA
1 8 2 Full HHB71000200-I In Stock $2.75902/EA EA
1 8 2 1/4 Full HHB71000225-I In Stock $4.07774/EA EA
1 8 2 1/2 Full HHB71000250-I In Stock $3.41323/EA EA
1 8 2 3/4 Full HHB71000275-I In Stock $4.68239/EA EA
1 8 3 Full HHB71000300-I In Stock $8.49022/EA EA
1 8 3 1/4 Partial HHB71000325-I In Stock $8.78807/EA EA
1 8 3 1/2 Partial HHB71000350-I In Stock $9.12642/EA EA
1 8 3 3/4 Partial HHB71000375-I In Stock $4.0624/EA EA
1 8 4 Partial HHB71000400-I In Stock $6.37501/EA EA
1 8 4 1/4 Partial HHB71000425-I In Stock $5.54121/EA EA
1 8 4 1/2 Partial HHB71000450-I In Stock $6.18502/EA EA
1 8 5 Partial HHB71000500-I In Stock $12.20718/EA EA
1 8 5 1/2 Partial HHB71000550-I In Stock $10.25778/EA EA
1 8 6 Partial HHB71000600-I In Stock $10.92333/EA EA
1 1/8 7 3 Full HHB71120300C-I In Stock $12.40559/EA EA
1 1/8 7 3 1/2 Full HHB71120350C-I 3-5 Working Days $30.89763/EA EA
1 1/8 7 4 Partial HHB71120400C-I In Stock $10.35401/EA EA
1 1/8 7 5 Partial HHB71120500C-I In Stock $13.58752/EA EA
1 1/8 7 5 1/2 Partial HHB71120550C-I In Stock $10.22099/EA EA
1 1/8 7 6 Partial HHB71120600C-I 3-5 Working Days $12.83328/EA EA
1 1/8 8 3 Full HHB71120300-I In Stock $15.66461/EA EA
1 1/8 8 3 1/2 Full HHB71120350-I In Stock $8.59659/EA EA
1 1/8 8 4 Partial HHB71120400-I In Stock $11.09035/EA EA
1 1/8 8 4 1/2 Partial HHB71120450-I In Stock $11.81199/EA EA
1 1/8 8 5 Partial HHB71120500-I In Stock $13.03221/EA EA
1 1/8 8 5 1/2 Partial HHB71120550-I In Stock $13.37007/EA EA
1 1/8 8 6 Partial HHB71120600-I In Stock $10.56766/EA EA
1 1/4 7 3 Full HHB71250300C-I In Stock $14.03035/EA EA
1 1/4 7 3 1/2 Full HHB71250350C-I In Stock $11.46396/EA EA
1 1/4 7 4 1/2 Partial HHB71250450C-I In Stock $19.58076/EA EA
1 1/4 7 5 Partial HHB71250500C-I In Stock $16.9623/EA EA
1 1/4 7 6 Partial HHB71250600C-I In Stock $21.08385/EA EA
1 1/4 8 2 Full HHB71250200-I 3-5 Working Days $13.77374/EA EA
1 1/4 8 3 Full HHB71250300-I In Stock $12.4781/EA EA
1 1/4 8 3 1/4 Full HHB71250325-I In Stock $13.50556/EA EA
1 1/4 8 3 1/2 Full HHB71250350-I In Stock $14.37036/EA EA
1 1/4 8 3 3/4 Partial HHB71250375-I 3-5 Working Days $18.54283/EA EA
1 1/4 8 4 Partial HHB71250400-I In Stock $13.69815/EA EA
1 1/4 8 4 1/4 Partial HHB71250425-I 3-5 Working Days $10.83955/EA EA
1 1/4 8 4 1/2 Partial HHB71250450-I In Stock $16.20572/EA EA
1 1/4 8 4 3/4 Partial HHB71250475-I 3-5 Working Days $81.72327/EA EA
1 1/4 8 5 Partial HHB71250500-I In Stock $16.78235/EA EA
1 1/4 8 5 1/2 Partial HHB71250550-I In Stock $14.01339/EA EA
1 1/4 8 6 Partial HHB71250600-I In Stock $12.22493/EA EA
1 1/4 8 6 1/2 Partial HHB71250650-I 3-5 Working Days $11.99545/EA EA
1 1/4 8 7 Partial HHB71250700-I 3-5 Working Days $37.67738/EA EA
1 1/4 8 8 Partial HHB71250800-I 3-5 Working Days $25.36562/EA EA
1 1/4 8 9 Partial HHB71250900-I 3-5 Working Days $75.465/EA EA
1 3/8 8 6 Partial HHB71370600-I 3-5 Working Days $73.85564/EA EA
1 3/8 8 9 Partial HHB71370900-I 3-5 Working Days $73.85564/EA EA
1 1/2 8 3 1/2 Full HHB71500350-I 3-5 Working Days $17.68547/EA EA
1 1/2 8 3 3/4 Full HHB71500375-I 3-5 Working Days $49.91875/EA EA
1 1/2 8 4 Full HHB71500400-I In Stock $133.67998/EA EA
1 1/2 8 4 1/2 Full HHB71500450-I 3-5 Working Days $57.71313/EA EA
1 1/2 8 4 3/4 Partial HHB71500475-I 3-5 Working Days $22.29444/EA EA
1 1/2 8 5 Partial HHB71500500-I 3-5 Working Days $34.12415/EA EA
1 1/2 8 5 1/2 Partial HHB71500550-I 3-5 Working Days $48.74066/EA EA
1 1/2 8 6 Partial HHB71500600-I 3-5 Working Days $39.44514/EA EA
1 1/2 8 6 1/2 Partial HHB71500650-I 3-5 Working Days $76.33247/EA EA