Our Standards Chart
Offering Custom Screws, Nuts & Bolts to Chicago, IL
Benchmark Fasteners offers every type of standard fastener available in the industry. Please use the charts below to help identify the parts you require for easy reference.
We invite you to request a quote online or contact our team at 888-323-6501 or submit an inquiry to us via our web form.
Head Styles & Drives
Driving Recesses
Head Styles
Point Styles
Tapping & Metallic Drive Screws
Machine Screws
Tamperproof Security Drives
Thread Classes
National Coarse (NC)
1 – 64
2 – 56
3 – 48
4 – 40
5 – 40
6 – 32
8 – 32
10 – 24
1/4 – 20
5/16 – 18
3/8 – 16
7/16 – 14
1/2 – 13
9/16 – 12
5/8 – 11
3/4 – 10
7/8 – 9
1 – 8
1 1/8 – 7
1 1/4 – 7
1 1/2 – 6
1 3/4 – 5
2 – 4.5
National Fine (NF)
0 – 80
1 – 72
2 – 64
3 – 56
4 – 48
5 – 44
6 – 40
8 – 36
10 – 32
1/4 – 28
5/16 – 24
3/8 – 24
7/16 – 20
1/2 – 20
9/16 – 18
5/8 – 18
3/4 – 16
7/8 – 14
1 – 14
1 1/8 – 12
1 1/4 – 12
1 1/2 – 12
1 3/4 – 12
2 – 12