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

 
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.
Keywords
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