Designation: F /F M â 07 Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series1 This. ASTM F/FM: Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series. Designation: F /F M – 05 Standard Speci?cation for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series1 This.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use f88 agencies of the Department of Defense.

The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the speci?

There are no ISO standards for surface discontinuities on any inch-series products.

Types of Surface Discontinuities see Terminology F for de? Shear bursts occur most frequently at the periphery of products having? Shear bursts may also occur on the sides of hex-head products.

  ANSI Z244.1 PDF

ASTM-F/FM-, 0 –

Typical shear bursts are shown in Fig. Current edition approved Oct. Originally approved in For metric series products, D and Dc are in millimetres; for inch-series products, D and Dc are in inches.

NOTE 1—Forging cracks within the limits of this speci? Voids are t788 by marks or impressions of chips shear burrs or by rust formation on the raw material. They are not planished during forging. Typical voids are shown in Fig.

ASTM F788.pdf

Typical tool marks are shown in Fig. NOTE 2—Bursts and shear bursts within the limits of this speci? Inspection and Evaluation 6.

Visual inspection can include the aatm of devices that provide up to, and including, power magni? Supplementary Requirements shall in no way negate any requirement of the speci?

After etch, the samples shall be examined under a 10 3 magni? The section shall be etched for microscopic examination in accordance with Test Method E Acceptance shall be based on the requirements of S1.

ASTM F788 – 13(2018)

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement f88 such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?


Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.