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Hex bolts, Zinc plated grade 8 steel yellow, 9/16"-18 x 5-1/2"

Grade 8 hex bolt

Prod. # Length Each price Bag price Bulk price Price Buy
4279 5-1/2" $8.18 / ea $71.49 / 10 $631.00 / 100 $8.18 / ea $71.49 / 10 $631.00 / 100
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Hex cap screw Varies (Body) dimensions
Grade 8 (Head) dimensions
Product details
Bolt Depot product# 4279
Units US
Category Hex bolts
Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
Subcategory Hex bolts
A bolt with a six sided head.
Material Steel
A tempered medium carbon steel.
Plating Zinc
Zinc plated for moderate corrosion resistance.
Grade Grade 8
Grade 8 is stronger than grade 5, and is commonly found in high strength automotive applications.
Color Yellow
Thread density Fine
Diameter 9/16"
Thread count 18
Length 5-1/2"
Length tolerance +0.00" / -0.10"
Thread direction Right hand
Head style Hex
Hex heads are six sided for use with a wrench.
Drive type External hex
A hexagonal head for use with a wrench.
Head height 0.348" - 0.371"
Width across the flats 13/16"
Fully threaded No
Thread length Minimum 1-3/8"
Dimensional standard ASME B18.2.1
Material standard SAE J429

Matching Products

Click on a product # for additional info

Prod. # Description Buy
2601
$0.78 / ea
$13.18 / 25
$116.00 / 250
3052
SAE flat washers, Zinc plated grade 8 steel yellow, 9/16"
SAE pattern is a tighter fit on the bolt and a smaller outside diameter.
$0.60 / ea
$9.94 / 25
$81.10 / 250
7185
Hex nylon insert lock nuts, Zinc plated grade 8 steel yellow, 9/16"-18
A hex nut with a nylon ring to resist loosening.
$0.93 / ea
$17.50 / 25
$150.00 / 250
3065
USS flat washers, Zinc plated grade 8 steel yellow, 9/16"
USS pattern is the most common type of flat washer.
$1.01 / ea
$16.89 / 25
$141.00 / 250
3042
Lock washers, Zinc plated grade 8 steel yellow, 9/16"
Split lock washers place tension against a nut after tightening, to help prevent loosening.
$0.21 / ea
$3.73 / 25
$33.50 / 250

See also

Metric hex bolt

Metric hex bolts

A bolt with a six sided head.