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IFI: Industrial Fasteners Institute

IFI, the Industrial Fasteners Institute, is a nonprofit organization founded in 1931 and represents the leading National American manufacturers of bolts, nuts, screws, rivets, and all types of special formed parts. It is headquartered near Cleveland, Ohio. With 110 member companies, including both manufacturers and affiliates, IFI standards are present in every step of the supply chain when it comes to fasteners.

Below are IFI's best-selling standards. To find additional standards, please use the search bar above.

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IFI-100/107:2002

Prevailing-Torque Type Steel Hex and Hex Flange Nuts Regular and Light Hex Series

This standard establishes the dimensional, mechanical, and performance requirements for three grades of prevailing-torque type steel hex nuts in sizes No. 4 thru 1-1/2 in., and two grades of prevailing-torque type steel hex flange nuts in sizes 1/4 thru 3/4 in.


IFI-524:2002

Test Procedure for the Performance of Metric Nonmetallic Resistant Element Prevailing-Torque Screws

This standard establishes a conformance test procedure for the performance of metric Nonmetallic Resistant Element Prevailing-Torque Screws in nominal thread diameters M1.6 thru M36.


IFI-115:2002

Flange 12-Point Screws

This standard provides the dimensional requirements for inch flange 12-point screws from nominal thread size 1/4 through 1 1/2 inches.


IFI-114:2003

Break Mandrel Blind Rivets

This standard establishes the dimensional, mechanical, and performance requirements of inch series break mandrel blind rivets suitable for use in joining the component parts of an assembly. A metric series counterpart standard is in existence under designation IFI-505.


IFI-124:2002

Test Procedures for the Performance of Nonmetallic Resistant Element Prevailing-Torque Screws

This standard establishes a conformance test procedure for the performance of Nonmetallic Resistant Element Prevailing-Torque Screws (REPT screws), in nominal screw sizes No. 0 thru 1½ in.


IFI-525:2007

Test Procedure for the Prevailing-Torque Performance of Metric Chemical Coated Screws

This standard establishes a conformance test procedure for the performance of metric adhesive coated prevailing-torque screws in nominal thread diameters M3 thru M20 inclusive.

Torque values given in this standard are conformance requirements for adhesive coated prevailing- torque screws and apply only to the combination of test conditions described in the performance test procedure (Para. 5.1). If the conditions of the actual service application differ from those of Para. 5.1 (e.g., length of thread engagement, class of internal thread tolerance, different coating on screw or mating part) the torque values may differ. Such values can only be determined through testing the prevailingtorque screw in its actual assembly.

This standard is not concerned with dimensional features such as head styles, or with other mechanical or performance capabilities such as strength properties, corrosion resistance, sealing, suitability for use in high or low temperatures, and/or consistency of torque-to-tension relationships during assembly. Such features and properties are covered in other standards and specifications, and must be referenced when specifying an adhesive coated prevailing- torque screw to ensure that all of the service conditions of the particular engineering application are properly met.


IFI-111:2002

Hex Flange Screws

This standard establishes the requirements for hex flange and indented hex flange screws in sizes 1/4 inch thru 3/4 inches. Provisions include three styles of standard fillets.


IFI-125:2007

Test Procedure for the Performance of Chemical Coated Prevailing-Torque Screws

This standard establishes a conformance test procedure for the performance of adhesive coated prevailing-torque screws, in nominal screw sizes No. 4 thru 3/4 in.

Torque values given in this standard are conformance requirements for adhesive coated prevailingtorque screws and apply only to the combination of test conditions described in the performance test procedure (Para. 5.1). If the conditions of the actual service application differ from those of Para. 5.1 (e.g., length of thread engagement, class of internal thread tolerance, different coating on screw or mating part) the torque values may differ. Such values can only be determined through testing the prevailing-torque screw in its actual assembly.

This standard is not concerned with dimensional features such as head styles, or with other mechanical or performance capabilities such as strength properties, corrosion resistance, sealing, suitability for use in high or low temperatures, and/or consistency of torque-to-tension relationships during assembly. Such features and properties are covered in other standards and specifications, and must be referenced when specifying an adhesive coated prevailing-torque screw to ensure that all of the service conditions of the particular engineering application are properly met.


IFI-126:2003

Break Mandrel Closed End Blind Rivets

This standard establishes the dimensional, mechanical, and performance requirements of inch series break mandrel closed end blind rivets suitable for use in joining the component parts of an assembly. A metric series counterpart standard is in existence under designation IFI-509.


IFI-130:2003

Structural Splitting Self-Plugging Pull Mandrel Blind Rivets

This standard establishes the dimensional, mechanical and performance requirements for structural splitting self-plugging pull mandrel blind rivets suitable for use in engineering assemblies where load transmitting capability by the rivet is a design requirement.


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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