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EXPERTISE // LABORATORIES // TESTING STANDARDS

Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series

ASTM F788

This specification establishes allowable limits for the various types of surface discontinuities that may occur during the manufacture and processing of bolts, screws, and studs, including heat-treated machine screws, tapping screws, and sems. Types of surface discontinuities are: crack; burst; seam; fold; thread lap; void; tool marks; and gouge and nick. These surface discontinuities shall be inspected in accordance with the specified requirements. This specification covers metric series products with nominal diameters of 4 mm and larger and with specified minimum tensile strengths of 420 MPa and higher; and inch series products with nominal diameters of No. 5 (0.1250 in.) and larger and with specified minimum tensile strengths of 60,000 psi and higher.

WJE laboratories are accredited by ANAB (ISO/IEC 17025) to perform testing standard ASTM F788 for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series. Contact us to learn more.

Keywords

ASTM F788 - Bolts - Bolts, Screws, and Studs - Studs - Surface Defects - Tensile Strength

ICS CODE

21.060.10 (Bolts, screws, studs)

UNSPSC CODE

31160000 (Hardware)

CITATION FORMAT

ASTM F788-13(2018), Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series, ASTM International, West Conshohocken, PA, 2018, www.astm.org

TESTING STANDARDS

Wiss, Janney, Elstner Associates is committed to helping our clients solve, repair, and avoid problems in the built world. Supported by unparalleled laboratory and field testing capabilities, our team of engineers, architects, and materials scientists brings an enthusiasm for problem solving and a hands-on technical approach to every challenge.

Ask the Structure and Solutions for the Built World are trademarks of Wiss, Janney, Elstner Associates, Inc.

© COPYRIGHT WISS, JANNEY, ELSTNER ASSOCIATES, INC., NORTHBROOK, ILLINOIS. ALL RIGHTS RESERVED.

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EXPERTISE // LABORATORIES // TESTING STANDARDS