ASTM F879M-16 - 1.5.2016
 
1. Scope

1.1 This specification covers the chemical and mechanical requirements for stainless steel metric hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws with nominal thread M 3 through M 20 intended for use in applications requiring general corrosion resistance.

1.2 The following three property classes are covered:

1.2.1 Austenitic Class A1-50 in an annealed condition at 585 MPa maximum,

1.2.2 Austenitic Class A1–55 in a cold worked condition at 550 MPa minimum, and

1.2.3 Austenitic Class A1-70 in a cold-worked condition at 700 MPa minimum.

1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 The following hazard caveat pertains only to Section 12, Test Methods: This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

F606M-14

Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric) (Withdrawn 2015)

E384-22

Standard Test Method for Microindentation Hardness of Materials

E92-23

Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials

F1470-24

Standard Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection

F788-20

Standard Specification for Surface Discontinuities of Bolts, Screws, Studs, and Rivets, Inch and Metric Series

F738M-02

Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs

E18-22

Standard Test Methods for Rockwell Hardness of Metallic Materials

D3951-18(2023)

Standard Practice for Commercial Packaging

A967/A967M-17

Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts

A751-21

Standard Test Methods and Practices for Chemical Analysis of Steel Products

A555/A555M-23

Standard Specification for General Requirements for Stainless Steel Wire and Wire Rods

A380/A380M-17

Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

A342/A342M-21

Standard Test Methods for Permeability of Weakly Magnetic Materials

ISO 7380–1

ISO 10642

Hexagon socket countersunk head screws

A262-15(2021)

Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels