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1.1 This specification covers the chemical and mechanical requirements of hexagon and square-head zinc-coated steel bolts and atmospheric corrosion-resistant bolts, in nominal thread diameters of 1/2 5/8, ¾, 7/8 and 1 in. for use in the construction of transmission towers, substations, and similar steel structures. The various types of bolts covered in this specification are:
1.1.1 Type 0—Hot-dip zinc-coated bolts made of low or medium carbon steel.
1.1.2 Type 1—Hot-dip zinc-coated bolts made of medium carbon steel, quenched and tempered.
1.1.3 Type 2—Withdrawn in 2005.
1.1.4 Type 3—Bare (uncoated), quenched and tempered bolts made of weathering steel.
1.2 Annex A1 of this specification covers hot-dip zinc-coated steel ladder bolts, step bolts, and support-equipment bolts.
1.3 Nuts and washers that are supplied under this specification that are hot-dip zinc coated shall be in accordance with 4.4.
1.4 Terms used in this specification are defined in Terminology F 1789
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 The following safety hazards caveat pertains only to the test methods portion, Section 11, 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A563 Specification for Carbon and Alloy Steel Nuts
D3951 Practice for Commercial Packaging
F436 Specification for Hardened Steel Washers
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
F2329 Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
ASME StandardsB1.1 Unified Screw Threads B18.2.1 Square and Hex Bolts and Screws B18.24 Part Identifying Number (PIN) Code System Standard for Fastener Products
ICS Number Code 21.060.10 (Bolts, screws, studs); 29.240.20 (Power transmission and distribution lines)
UNSPSC Code 11101704(Steel); 31161600(Bolts)
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ASTM A394-08, Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare, ASTM International, West Conshohocken, PA, 2008, www.astm.orgBack to Top