Standardized Heads for Screws and Bolts

These standards from ISO, SAE, and IFI cover standardized screw requirements sorted by head.

 Back to fastener standards for screws, bolts, and studs Home

Hex Heads

ISO 4017:2022
ISO 4018:2022
IFI-149:2002
IFI-111:2002
ISO 10509:2012
See All Related Standard Packages

Flat Fillister Heads

SAE AS 115401B-2014 (SAE AS115401B-2014)
SAE AS 115451C-2014 (SAE AS115451C-2014)
SAE AS 115501B-2014 (SAE AS115501B-2014)
SAE AS 115601B-2014 (SAE AS115601B-2014)
SAE AS 115651B-2014 (SAE AS115651B-2014)
See All Related Standard Packages

Oval Fillister Heads

SAE AS 116901B-2012 (SAE AS116901B-2012)
SAE AS 116913C-2018
SAE AS 116925B-2012 (SAE AS116925B-2012)
SAE AS 116961D-2025
SAE AS 117001B-2012 (SAE AS117001B-2012)
See All Related Standard Packages

Cheese Heads

ISO 1207:2011
ISO 7048:2011
ISO 14580:2011
See All Related Standard Packages

Pan Heads

ISO 1580:2011
ISO 14583:2011
ISO 1481:2011
ISO 7045:2011
ISO 12260:2016
See All Related Standard Packages

Countersunk Heads

ISO 7721:1983
ISO 7721-2:1990
ISO 7047:2011
ISO 2009:2011
ISO 2010:2011
See All Related Standard Packages

Round Heads

SAE AS 3568A-2018
See All Related Standard Packages

DoubleHex Heads

SAE AS 9207C-2012 (SAE AS9207C-2012)
SAE AS 9216C-2012 (SAE AS9216C-2012)
SAE AS 9554F-2024
SAE AS 9555E-2023
SAE AS 9557F-2023
See All Related Standard Packages

Useful Links

CUSTOMER SERVICE

Our Contacts

ANSI HEADQUARTERS
1899 L Street, NW, 11th Floor
Washington, DC 20036

Tel: 202.293.8020
Fax: 202.293.9287

NEW YORK OFFICE
1180 6th Ave, 10th floor
New York, NY 10036

Tel: 212. 642.4900
Fax: 212.398.0023