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Flange bolts, Partial thread, Zinc plated grade 8 steel yellow, 5/16"-18 x 3"

Non-serrated grade 8 hex flange bolts

These bolts are all partially threaded. Shorter lengths are found with full thread.

Prod. # Length Each price Bag price Bulk price Price Buy
17203 3" $0.70 / ea $25.31 / 50 $219.00 / 500 $0.70 / ea $25.31 / 50 $219.00 / 500
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Product Images

Flange bolt dimensions - Side view
Flange bolt dimensions - Top view
Product details
Bolt Depot product# 17203
Units US
Category Flange bolts
Flange bolts have a flange on the bottom of the head that distributes the load like a washer.
Head style Hex flange
Drive type External hex
A hexagonal head for use with a wrench.
Dimensional standard IFI-111 (2002)
Meets IFI-111 (2002).
Fully threaded No
(Note: Shorter lengths are found under full thread.)
Serrated No
Flange bolts that are non-serrated are sometimes called frame bolts.
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 Coarse
Diameter 5/16"
Thread count 18
Length 3"
Thread direction Right hand
Flange diameter Maximum 0.680"
Flange height Minimum 0.050"
Thread length 7/8"
Body length Minimum 1.708"
Width across the flats 1/2"
Head height Maximum 0.320"

See also

Non-serrated full thread grade 8 hex flange bolts

Flange bolts, Full thread, Zinc plated grade 8 steel yellow, 5/16"-18

Full thread, including shorter lengths.

Flange bolts

Metric flange bolts

Flange bolts have a flange on the bottom of the head that distributes the load like a washer.