ASTM C1513-18

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Designation: C1513 − 13 C1513 − 18
Standard Specification for
Steel Tapping Screws for Cold-Formed Steel Framing
Connections
This standard is issued under the fixed designation C1513; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers steel self-drilling and self-piercing tapping screws for the connection of cold-formed steel
members manufactured in accordance with Specifications C645 and C955. This specification also covers test methods for
determining performance requirements and physical properties.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 The following safety hazards caveat pertains only to the test methods described in this specification. This standard does not
purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to
establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability of regulatory
requirementslimitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A510 Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel
A1040 Guide for Specifying Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels
B117 Practice for Operating Salt Spray (Fog) Apparatus
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C645 Specification for Nonstructural Steel Framing Members
C955 Specification for Cold-Formed Steel Structural Framing Members
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1941 Specification for Electrodeposited Coatings on Threaded Fasteners (Metric) F1941_F1941M
2.2 ANSI/ASME Documents:
ANSI/ASME B18.6.4 Standard Specification for Thread Forming and Thread-Cutting Screws
ANSI/ASME B18.18 Quality Assurance for Fasteners3
2.3 SAE Standards:
SAE J78 Steel Self-Drilling Tapping Screws
SAE J933 Mechanical and Quality Requirements for Tapping Screws
3. Terminology
3.1 Definitions—For definitions relating to gypsum and related building materials and systems, use Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.
Current edition approved March 1, 2013April 1, 2018. Published April 2013April 2018. Originally approved in 2001. Last previous edition approved in 20122013 as
C1513C1513 – 13.–12a. DOI: 10.1520/C1513-13.10.1520/C1513-18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
www.asme.org.
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1513 − 18
3.2.1 bearing surface (of the screw), n—the supporting or locating surface of a fastener with respect to the part which it fastens
(mates). The loading of the fastener is usually through the bearing surface, (that is, the bearing surface of the hex washer head style
is under the head, the part that touches the top material being fastened).
3.2.2 case depth (of the screw), n—the thickness of the hardened surface of the screw.
3.2.3 countersunk head style (for a screw), n—all screw head designs that sink into the top material being fastened and that have
the bearing surface (see 3.2.1), at the top of the head (that is, flat and bugle).
3.2.4 crest (of the screw thread), n—the highest point of the screw thread.
3.2.5 drill capacity (of the self-drilling screw), n—the total thickness of material the fastener is designed to drill through,
including any space between the layers.
3.2.6 head styles (of the screw), n—refer to Fig. 1 drawings.
3.2.6.1 bugle head, n—bugle shape countersinking head typically used for fastening gypsum panel products to wood and steel.
3.2.6.2 hex washer head, n—has an indented top surface and six flat sides formed integrally with a flat washer which projects
beyond the sides and provides a flat bearing surface.
3.2.6.3 lath head, n—see modified truss.
3.2.6.4 modified truss, n—low profile round washer head.
3.2.6.5 pan framing head, n—flat top surface rounding into cylindrical sides and a flat bearing surface.
3.2.6.6 pan head, n—a slightly rounded top surface rounding into cylindrical sides and a flat bearing surface.
3.2.6.7 pancake head, n—lower profile head style than the hex washer and pan head with a larger flat bearing surface.
3.2.6.8 wafer head, n—a countersinking head style with a large lip at the top of the countersinking contour that will “flush” with
the substrate creating a greater bearing surface, therefore a greater pull-over/pull-through value.
3.2.7 point style, n—of the self-drilling tapping screw is designated by a number (that is, 1, 2, 3, 4, or 5). The higher the number,
the higher the drill capacity (see 3.2.5) of the screw.
3.2.8 root (of the screw thread), n—the lowest point of the screw thread.
3.2.9 self-drilling tapping screw, n—externally threaded fasteners with the ability to drill their own hole and form or cut their
own internal mating threads without breaking.
3.2.10 self-piercing tapping screw, n—externally threaded fasteners with the ability to pierce metallic material 33 mils (0.84
mm), or less, form a sleeve by extruding metallic material and “tap” their own mating threads when driven. Self-piercing screws
have a sharp point with the point angle not more than 30 degrees.
3.2.11 spin-out (for a screw), n—for a screw, the continued rotation of a screw without further penetration into the substrate.
3.2.12 tapping screw, n—externally threaded fasteners with the ability to “tap” their own internal mating threads when installed.
4. Classification
4.1 Steel tapping screws covered by this specification are two types:
4.1.1 Self-drilling.
4.1.2 Self-piercing.
5. Materials
5.1 Steel wire, Specification A510–minimum grade 1018.
5.1.1 Chemical composition shall be in accordance with Specification A1040, minimum Grade 1018.
6. Physical Properties
6.1 Dimensions:
6.1.1 Self-drilling tapping screws shall be in accordance with SAE J78 based upon nominal size or basic diameter. Threads per
inch (TPI) shall be as shown in Table 1.
FIG. 1 Head Styles
C1513 − 18
TABLE 1 Threads Per Inch (TPI)
Nominal Threads Per Threads Per
Screw Size Inch, max Inch, min
6 20 10
8 20 12
10 24 12
12 24 14
⁄4 in. 28 14
6.1.2 Self-piercing tapping screws shall be in accordance with head dimensions as shown in ANSI/ASME B18.6.4.
6.2 Total Case Depth—Screws shall have a total case depth conforming to the tabulation in Table 2.
6.2.1 Case depth shall be measured at the mid-point between crest and root on the thread shank.
7. Packaging and Head Marking
7.1 Screws shall be marked with manufacturer’s/supplier’s head marking for traceability.
7.2 Screws shall be packaged in substantial commercial shipping containers, constructed so as to preserve the contents in good
condition and to ensure acceptance and safe delivery by common or other carriers.
7.2.1 Individual packages shall be so constructed that the contents shall be able to be partially removed without destroying the
container’s ability to serve as a receptacle for the remainder of the contents.
7.2.2 Individual packages and shipping containers shall be marked with the type, size, use, and quantity of the screws contained
therein, the name brand headmarking example and trademark of the producer or supplier, the ASTM designation, and any or all
appropriate evaluation reports . reports. Boxes shall be marked with the drill capacity of the self-drilling tapping screws.
8. Performance Requirements
8.1 Hardness:
8.1.1 The self-drilling tapping screws shall have a surface hardness of not less than Rockwell C50 and core hardness of not less
than Rockwell C32 as tested in accordance with SAE J78.
8.1.2 The self-piercing screws shall have a surface hardn
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