Hex Cap Screws Aluminum 5/16-18

5/16"-18 Aluminum Hex Cap Screws

Lightweight Aluminum Hex Head Bolts | 5/16" Diameter - 18 Threads per Inch


  • Size: 5/16"-18
  • Hexagon head designed to be driven by a wrench or socket
  • Also called hex cap bolts, hex bolts, tap bolts or hex cap screws
  • Lightweight 2024-T4 Aluminum Alloy
  • High strength-to-weight ratio
  • Commonly used in the automotive and aerospace industries
  • Resistant to atmospheric corrosion

Hex Cap Screws feature a hexagonal head designed to be driven with a wrench or socket, and are commonly used with nuts and washers as a fastener assembly.

Important: We recommend not mixing metals; aluminum fasteners should be used with aluminum fasteners. For more information, please read our article on the subject HERE.

A Hex Bolt is measured as: Diameter x Thread Pitch x Length from Under Head
*Aluminum Hex Cap Screws are Fully Threaded Regardless of Length. A fully threaded hex cap screw can also be called a tap bolt.

Select Products Below See Product Specifications

NA = "Not Sold In Single Quantity"

Size
Select Package Quantity
SubTotal
Aluminum Hex Cap Screws 5/16"-18 x 3/4" FT
SKU #1000-116-0002
Aluminum Hex Cap Screws 5/16"-18 x 3/4" FT
SKU #1000-116-0002
1
$1.02 (1.02/ea)
25
$24.75 (0.99/ea)
100
$95.00 (0.95/ea)
1000
$930.00 (0.93/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 1" FT
SKU #1000-116-0012
Aluminum Hex Cap Screws 5/16"-18 x 1" FT
SKU #1000-116-0012
1
$1.11 (1.11/ea)
25
$27.00 (1.08/ea)
100
$104.00 (1.04/ea)
1000
$1,020.00 (1.02/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 1-1/4" FT
SKU #1000-116-0022
Aluminum Hex Cap Screws 5/16"-18 x 1-1/4" FT
SKU #1000-116-0022
1
$1.24 (1.24/ea)
25
$29.50 (1.18/ea)
100
$114.00 (1.14/ea)
1000
$1,100.00 (1.1/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 1-1/2" FT
SKU #1000-116-0032
Aluminum Hex Cap Screws 5/16"-18 x 1-1/2" FT
SKU #1000-116-0032
1
$1.36 (1.36/ea)
25
$33.00 (1.32/ea)
100
$125.00 (1.25/ea)
1000
$1,240.00 (1.24/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 1-3/4" FT
SKU #1000-116-0042
Aluminum Hex Cap Screws 5/16"-18 x 1-3/4" FT
SKU #1000-116-0042
1
$1.56 (1.56/ea)
25
$37.75 (1.51/ea)
100
$144.00 (1.44/ea)
1000
$1,430.00 (1.43/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 2" FT
SKU #1000-116-0052
Aluminum Hex Cap Screws 5/16"-18 x 2" FT
SKU #1000-116-0052
1
$1.92 (1.92/ea)
25
$47.25 (1.89/ea)
100
$179.00 (1.79/ea)
1000
$1,770.00 (1.77/ea)
Subtotal: $0.00 /
Aluminum Hex Cap Screws 5/16"-18 x 2-1/2" FT
SKU #1000-116-0062
Aluminum Hex Cap Screws 5/16"-18 x 2-1/2" FT
SKU #1000-116-0062
1
$2.00 (2/ea)
25
$47.75 (1.91/ea)
100
$183.00 (1.83/ea)
1000
$1,810.00 (1.81/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

1
NA
25
$5.75 (0.23/ea)
100
$15.00 (0.15/ea)
1000
$130.00 (0.13/ea)
Subtotal: $0.00 /
1
NA
25
$2.75 (0.11/ea)
100
$10.00 (0.1/ea)
1000
$80.00 (0.08/ea)
Subtotal: $0.00 /
1
NA
25
$3.50 (0.14/ea)
100
$12.00 (0.12/ea)
1000
$110.00 (0.11/ea)
Subtotal: $0.00 /
1
NA
25
$10.00 (0.4/ea)
100
$27.00 (0.27/ea)
1000
$200.00 (0.2/ea)
Subtotal: $0.00 /

Product Specifications
Color
Silver
Diameter
5/16"
Drive Style
External Hex
FT = Full Thread
Yes
Head Height
13/16"
Head Style
Hex
Material
Aluminum
Product Type
Hex Cap Screw
Standards Met
ASME B18.2.1
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Length Max
5/16" Diameter Hex Cap Screws 1-1/2" in length and up will have a shoulder (partial thread)
Thread Pitch (Count)
18 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Width Across Corners
0.577
Wrench Size
1/2"