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Machine screws, Combo truss head, Zinc plated steel, 5/16"-18 x 5"

Combination truss head

Prod. # Length Each price Bag price Bulk price Price Buy
21218 5" $0.51 / ea $33.99 / 100 $313.00 / 1,000 $0.51 / ea $33.99 / 100 $313.00 / 1,000
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Combo truss machine screw dimensions
Product details
Bolt Depot product# 21218
Units US
Category Machine screws
Screws with machine threads for use with a nut or in a tapped hole.
Subcategory Machine screws
Machine screws have machine threads for use with a nut or in a tapped hole.
Head style Truss
Truss heads are wide with a low profile rounded top.
Drive type Combination phillips/slotted
Combination drive can be used with either a flat bladed or Phillips screw driver.
Material Steel
A low carbon steel for general use.
Plating Zinc
Zinc plated for moderate corrosion resistance.
Thread density Coarse
Diameter 5/16"
Thread count 18
Length 5"
Dimensional standard ASME B18.6.3
Thread direction Right hand
Head height 0.162" - 0.183"
Head diameter 0.666" - 0.698"
Drive size #4

Matching Products

Click on a product # for additional info

Prod. # Description Buy
2649
Hex nuts, Zinc plated steel, 5/16"-18
A standard six sided nut.
$0.09 / ea
$6.25 / 100
$50.00 / 1,000
2625
Hex nylon insert lock nuts, Zinc plated steel, 5/16"-18
A hex nut with a nylon ring to resist loosening.
$0.14 / ea
$6.99 / 100
$60.00 / 1,000
2995
USS flat washers, Zinc plated steel, 5/16"
USS pattern is the most common type of flat washer.
$0.06 / ea
$4.20 / 100
$35.70 / 1,000
2977
SAE flat washers, Zinc plated steel, 5/16"
SAE pattern is a tighter fit on the bolt and a smaller outside diameter.
$0.05 / ea
$3.20 / 100
$27.20 / 1,000
3025
Lock washers, Zinc plated steel, 5/16"
Split lock washers place tension against a nut after tightening, to help prevent loosening.
$0.08 / ea
$2.53 / 100
$21.70 / 1,000

See also

Metric machine screw

Metric machine screws

Screws with machine threads for use with a nut or in a tapped hole.

Socket product

Socket screws

Screws with an Allen wrench drive.