Standard Specification for Steel Wire, Cold-Drawn, for Coiled-Type Springs
1.1 This specification covers round, cold-drawn, steel spring wire having properties and quality intended for the manufacture of the following types of upholstery springs: 1.1.1 Type A - Coiled (Marshall pack), 1.1.2 Type B - Coiled and knotted, 1.1.3 Type C - Coiled and knotted (offset style), 1.1.4 Type D - Coiled and hooked (single and cross helicals), 1.1.5 Type E - Coiled and hooked (short tension-regular tensile strength), 1.1.6 Type F - Coiled and hooked (short tension-high tensile strength), 1.1.7 Type G - Regular lacing, 1.1.8 Type H - Automatic lacing, 1.1.9 Type I - Zig-zag (U-formed), 1.1.10 Type J - Square-formed, and 1.11 Type K - Sinuous for furniture spring units.
