ASTM A394-05
(Specification)Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare
Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare
SCOPE
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, 3/4, 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—Zinc-coated bolts made of low or medium carbon steel.
1.1.2 Type 1—Zinc-coated bolts made of medium carbon steel, quenched and tempered.
1.1.3 Type 2—Zinc-coated bolts made from what is generally described as low-carbon martensite steel, quenched and tempered.
1.1.4 Type 3—Bare (uncoated), quenched and tempered bolts made of steel having atmospheric corrosion-resistance and weathering characteristics comparable to that of the steel covered in Specifications A 242/A 242M, A 588/A 588M, and A 709/A 709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition (see 5.4). When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.
1.1.5 For applications requiring improved low-temperature characteristics, use of Types 1, 2, or 3 bolts is recommended.
1.2 Annex A1 of this specification covers zinc-coated steel ladder bolts, step bolts, and support-equipment bolts.
1.3 Unless otherwise specified, all nuts used on these bolts shall be hex style and conform to the requirements of Specification A 563 as follows:
Bolt TypeNut GradeFinish0AZinc-coated1 and 2DHZinc-coated3DH3Plain
1.4 Suitable washers for use with Type 0 are zinc-coated carbon-steel washers with dimensions that are in accordance with Specification F 436. Suitable washers for use with Type 1 and Type 2 bolts are zinc-coated Type 1 hardened-steel washers that are in accordance with Specification F 436. Suitable washers for use with Type 3 bolts are Type 3 hardened-steel washers that are in accordance with Specification F 436.
1.5 Nuts and washers that are supplied under this specification that are zinc coated shall be in accordance with 4.4.
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 394 – 05
Standard Specification for
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Steel Transmission Tower Bolts, Zinc-Coated and Bare
This standard is issued under the fixed designation A 394; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2. Referenced Documents
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1.1 This specification covers the chemical and mechanical 2.1 ASTM Standards:
requirements of hexagon and square-head zinc-coated steel A 153/A 153M Specification for Zinc Coating (Hot-Dip) on
bolts and atmospheric corrosion-resistant bolts, in nominal Iron and Steel Hardware
1 5 3 7
thread diameters of ⁄2 ⁄8 , ⁄4 , ⁄8 and 1 in. for use in the A 563 Specification for Carbon and Alloy Steel Nuts
construction of transmission towers, substations, and similar D 3951 Practice for Commercial Packaging
steel structures. The various types of bolts covered in this F 436 Specification for Hardened Steel Washers
specification are: F 606 Test Methods for Determining the Mechanical Prop-
1.1.1 Type 0—Hot-dip zinc-coated bolts made of low or erties of Externally and Internally Threaded Fasteners,
medium carbon steel. Washers, and Rivets
1.1.2 Type 1—Hot-dip zinc-coated bolts made of medium F 788/F 788M Specification for Surface Discontinuities of
carbon steel, quenched and tempered. Bolts, Screws, and Studs, Inch and Metric Series
1.1.3 Type 2—Withdrawn in 2005. F 1470 GuideforFastenerSamplingforSpecifiedMechani-
1.1.4 Type 3—Bare (uncoated), quenched and tempered cal Properties and Performance Inspection
bolts made of weathering steel. F 1789 Terminology for F16 Mechanical Fasteners
1.2 Annex A1 of this specification covers hot-dip zinc- G 101 Guide for Estimating the Atmospheric Corrosion
coated steel ladder bolts, step bolts, and support-equipment Resistance of Low-Alloy Steels
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bolts. 2.2 ASME Standards:
1.3 Nuts and washers that are supplied under this specifica- B1.1 Unified Screw Threads
tion that are hot-dip zinc coated shall be in accordance with B18.2.1 Square and Hex Bolts and Screws
4.4. B18.24 Part Identifying Number (PIN) Code System
1.4 Terms used in this specification are defined in Termi-
3. Ordering Information
nology F 1789.
3.1 Ordersforproductsunderthisspecificationshallinclude
1.5 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for the following:
3.1.1 Quantity (number of bolts and accessories).
information only.
1.6 The following safety hazards caveat pertains only to the 3.1.2 Name of products, including accessories such as
A 563 nuts and F 436 washers when desired.
test methods portion, Section 11, of this specification. This
standard does not purport to address all of the safety concerns, 3.1.3 Dimensions, including nominal bolt diameter and
length. For bolts other than transmission-tower bolts, complete
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health dimensions are required (see Annex A1).
3.1.4 Type of bolt (for example, Type 0, 1, or 3).
practices and determine the applicability of regulatory limita-
tions prior to use.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This specification is under the jurisdiction of ASTM Committee F16 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Standards volume information, refer to the standard’s Document Summary page on
Nuts, Rivets, and Washers. the ASTM website.
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Current edition approved Sept. 15, 2005. Published September 2005. Originally Available from American Society of Mechanical Engineers (ASME), ASME
approved in 1955. Last previous edition approved in 2004 as A 394 – 04. International Central, 22 Law Dr., PO Box 2300, Fairfield, NJ 0700–2300.
*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.
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A394–05
3.1.4.1 When non-zinc-coated atmospheric corrosion- 4.2.2 Type 3 bolts shall be quenched only in oil from above
resistant steel is required,Type 3 bolts shall be specified by the the austenitizing temperature.
purchaser.
4.2.3 Type 1 bolts, regardless of the steel used, and Type 3
3.1.5 ASTM designation and year of issue. When year of
bolts shall be tempered by reheating to not less than 800°F.
issueisnotspecified,boltsshallbefurnishedtothelatestissue.
4.2.4 Cold-he
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