Standard Specification for
Vinyl-Coated Glass Yarns1

This standard is issued under the fixed designation D 3374; 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 (e) indicates an editorial change since the last revision or reapproval.

1. Scope *

1.1 This specification covers vinyl-coated glass yarns.
These yarns are manufactured in two basic classes. These
classes have established that adequate strength, durability, and insect protection are obtained when properly woven into screening. The two classes are as follows:

1.1.1 Class 1—Nominal thickness 0.292 mm (0.0115 in.).

1.1.2 Class 2—Nominal thickness 0.330 mm (0.0130 in.).

1.2 The values stated in either SI or inch-pound units are to
be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system
shall be used independently of the other. Combining values
from the two systems may result in nonconformance with this
specification.

1.3 The following precautionary statement pertains only to
the test method portions, Sections 12–21, of 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 and
health practices and determine the applicability of regulatory
limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:
D 123 Terminology Relating to Textiles2
D 578 Specification for Glass Fiber Strands2
D 885 Test Methods for Tire Cords, Tire Cord Fabrics, and
Industrial Filament Yarns Made From Man-Made OrganicBase Fibers2
D 1776 Practice for Conditioning and Testing Textiles2
D 1907 Test Method for Yarn Number by the Skein
Method2
D 2256 Test Method for Tensile Properties of Yarns by the
Single-Strand Method2
D 4329 Practice for Fluorescent UV Exposure of Plastics3
D 4909 Test Method for Color Stability of Vinyl-Coated
Glass Textiles to Accelerated Weathering4

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