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Hex bolts, Zinc plated grade 5 steel, 5/16"-18 x 6"

Grade 5 hex bolt

Prod. # Length Each price Bag price Bulk price Price Buy
355 6" $0.99 / ea $43.20 / 50 $354.00 / 500 $0.99 / ea $43.20 / 50 $354.00 / 500
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Hex cap screw Varies (Body) dimensions
Grade 5 (Head) dimensions
Product details
Bolt Depot product# 355
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 5
Grade 5 falls between grade 2 and grade 8 in strength, and is commonly found in automotive applications.
Thread density Coarse
Diameter 5/16"
Thread count 18
Length 6"
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 0.195" - 0.211"
Width across the flats 1/2"
Fully threaded No
Thread length Minimum 7/8"
Dimensional standard ASME B18.2.1
Material standard SAE J429

Matching Products

Click on a product # for additional info

Prod. # Description Buy
2570
$0.11 / ea
$7.50 / 100
$60.00 / 1,000
15030
SAE flat washers, Zinc plated grade 5 steel, 5/16"
SAE pattern is a tighter fit on the bolt and a smaller outside diameter.
$0.09 / ea
$5.85 / 100
$50.30 / 1,000
21805
Hex nylon insert lock nuts, Zinc plated grade 5 steel, 5/16"-18
A hex nut with a nylon ring to resist loosening.
$0.19 / ea
$13.24 / 100
$113.00 / 1,000
15022
USS flat washers, Zinc plated grade 5 steel, 5/16"
USS pattern is the most common type of flat washer.
$0.13 / ea
$8.75 / 100
$78.80 / 1,000

See also

Metric hex bolt

Metric hex bolts

A bolt with a six sided head.

Grade 5 full thread tap bolt

Tap bolts, Zinc plated grade 5 steel, 5/16"-18

A full thread bolt with a six sided head.