ASTM F901-01(2012)
(Specification)Standard Specification for Aluminum Transmission Tower Bolts and Nuts
Standard Specification for Aluminum Transmission Tower Bolts and Nuts
ABSTRACT
This specification covers aluminum transmission tower bolts and nuts. Bolts shall be manufactured from alloy 2024 and nuts from alloy 6061 or 6262, and shall be cold formed, hot formed, or machined formed. Alloy materials for bolts and nuts shall conform to the chemical requirements of this specification. Bolts and nuts shall conform to the required tensile strength, dimensions, workmanship, finish, appearance, marking, packaging, and shipping. Test methods shall include chemical analysis, wedge tension test, shear test, and proof-stress test.
SCOPE
1.1 This specification covers aluminum structural bolts and nuts for use in the construction of aluminum transmission towers, substations, and similar aluminum structures.
1.2 Diameters of bolts and nuts furnished to this specification are 5/8, ¾, and 7/8 in.
1.3 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.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F901 −01 (Reapproved 2012)
Standard Specification for
Aluminum Transmission Tower Bolts and Nuts
ThisstandardisissuedunderthefixeddesignationF901;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope F1470 Practice for Fastener Sampling for Specified Me-
chanical Properties and Performance Inspection
1.1 This specification covers aluminum structural bolts and
2.2 ASME Standards:
nuts for use in the construction of aluminum transmission
B1.1 Unified Inch Screw Threads (UN and UNR Thread
towers, substations, and similar aluminum structures.
Form)
1.2 Diameters of bolts and nuts furnished to this specifica-
B18.2.1 Square and Hex Bolts and Screws (Inch Series)
5 3 7
tion are ⁄8, ⁄4, and ⁄8 in.
Addenda A
B18.2.2 Square and Hex Nuts
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical 2.3 Military Standard:
MIL-STD-A-8625 Anodic Coatings for Aluminum and
conversions to SI units that are provided for information only
and are not considered standard. Aluminum Alloys
3. Ordering Information
2. Referenced Documents
3.1 Orders for bolts and nuts under this specification shall
2.1 ASTM Standards:
include the following:
B565 Test Method for Shear Testing of Aluminum and
3.1.1 Quantity (number of pieces of each item and size);
Aluminum-Alloy Rivets and Cold-Heading Wire and
3.1.2 Name of item;
Rods
3.1.3 Size (diameter, threads per inch, length);
D3951 Practice for Commercial Packaging
3.1.4 Alloy number;
E29 Practice for Using Significant Digits in Test Data to
3.1.5 Shipment lot testing, as required (see Supplementary
Determine Conformance with Specifications
Requirements S1);
E34 Test Methods for Chemical Analysis of Aluminum and
3.1.6 Source inspection, if required (see Section 14);
Aluminum-Base Alloys
3.1.7 Certificate of compliance or test report, if required
E55 Practice for Sampling Wrought Nonferrous Metals and
(see Section 16);
Alloys for Determination of Chemical Composition
3.1.8 Additional requirements, if any, to be specified on the
E101 TestMethodforSpectrographicAnalysisofAluminum
purchase order (see 4.2.1, 4.2.3, 8.2.1, 8.2.2, 9.2, 12.1, and
and Aluminum Alloys by the Point-to-Plane Technique
13.1);
(Withdrawn 1996)
3.1.9 Supplementary requirements, if any; and
E227 Test Method for Optical Emission Spectrometric
3.1.10 ASTM specification and year of issue.
Analysis of Aluminum and Aluminum Alloys by the
Point-to-Plane Technique (Withdrawn 2002)
NOTE 1—Example: 10 000 piecesAluminum Transmission Tower Bolt,
F606 Test Methods for Determining the Mechanical Proper-
0.750-10 by 2.00 in., Alloy 2024-T4, Furnish Certificate of Compliance,
Supplementary Requirement S2, ASTM F901–XX.
ties of Externally and Internally Threaded Fasteners,
Washers, Direct Tension Indicators, and Rivets
4. Materials and Manufacture
4.1 Materials—Bolts shall be manufactured from Alloy
This specification is under the jurisdiction of ASTM Committee F16 on
2024 and nuts from Alloy 6061 or 6262. The materials
Fasteners and is the direct responsibility of Subcommittee F16.04 on Nonferrous
chemical composition shall be capable of developing the
Fasteners.
mechanicalpropertiesrequiredbyTable1,wheninthefinished
Current edition approved April 1, 2012. Published May 2012. Originally
approvedin1984.Lastpreviouseditionapprovedin2007asF901 – 01(2007).DOI:
condition.
10.1520/F0901-01R12.
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 Available from IHS, 15 Inverness Way East, Englewood, CO 80112, http://
Standards volume information, refer to the standard’s Document Summary page on www.global.ihs.com.
the ASTM website. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
The last approved version of this historical standard is referenced on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
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F901 − 01 (2012)
TABLE 1 Tensile Strength of 2024-T4 Bolts and Proof Loads for TABLE 3 Sample Size and Acceptance for Mechanical Property
A
6061-T6 and 6262-T9 Nuts Tests
Bolt Size, in. Tensile Strength, min, lbf (kN)
Acceptance Criteria
⁄8 12 400 (55) Number of Pieces in Lot
Number of Acceptance Rejection
⁄4 18 400 (82)
Tests Number Number
⁄8 25 400 (113)
50 and under 2 0 1
A
Based on a tensile unit stress of 55 000 psi (380 MPa) and the thread stress 51 to 500 3 0 1
area calculated as follows: 501 to 35 000 5 0 1
35 001 to 100 000 8 0 1
A 5 0.7854 fD2 s0.9743/ndg
s
where:
A = stress area,
s
6. Mechanical Properties
D = nominal diameter, and
n = threads/in.
6.1 Bolts—Bolts having a length three times the diameter or
longer shall be tested full size as specified in 13.2.2. At the
manufacturer’s option, bolts of less than 3 diameters in length
4.2 Manufacture: may be tested in full size as specified in 13.2.2. Bolts subjected
4.2.1 Forming—Unless otherwise specified, the bolts and
to tension tests shall meet the tensile strength requirements
nuts shall be cold formed, hot formed, or machined from specified in Table 1. Bolts of less than 3 diameters in length or
suitable material at the option of the manufacturer.
for other reasons cannot be tested full size in tension, shall be
4.2.2 Condition—The fasteners shall be furnished in the subject to a shear test to be performed in accordance with
following conditions:
12.2.1. The test results shall conform to the following mini-
mum shear-strength requirements: 37 ksi (255 MPa) for
Alloy Fastener Condition
2024-T4.
2024-T4 bolts solution treated and naturally aged
6.2 Nuts—Nuts shall be tested in accordance with the
6061-T6 nuts solution treated and artificially aged
6262-T9 nuts solution treated, artificially aged, and
mechanical requirements for the applicable type and shall meet
cold worked
the minimum proof-load requirements in Table 1.
4.2.3 Threads—Unless otherwise specified, the threads shall
be rolled or cut at the option of the manufacturer. 7. Significance of Numerical Limits
7.1 For purposes of determining compliance with the speci-
5. Chemical Composition
fied limits for requirements of the properties listed in this
5.1 Chemical Composition Limits—The bolts and nuts shall
specification, an observed value or calculated value shall be
conform to the requirements as to chemical composition
rounded in accordance with Practice E29.
prescribed in Table 2.
8. Dimensions
5.2 Manufacturer’s Analysis—When test reports are re-
quired on the inquiry or purchase order (see 3.1.7), the 8.1 Bolts and Nuts:
manufacturer shall furnish a certificate of conformance certi- 8.1.1 Bolts—Bolts shall be full-size body in accordance
fying compliance with the chemical limits specified in Table 2. with the requirements of AMSE B18.2.1, except the full-body
length listed in Table 4 shall be the basis of manufacture and
5.3 Product Analysis:
inspection. Unless otherwise specified, hex bolts shall be
5.3.1 Product analyses may be made by the purchaser from
furnished. The ends of the bolts need not be chamfered or
finished products representing each lot. The chemical compo-
pointed.
sition thus determined shall conform to the requirements in
8.1.2 Nuts—The dimensions of the nuts shall be in accor-
Table 2.
dance with the requirements of ASME B 18.2.2. Unless
5.3.2 In the event of disagreement, a referee chemical
otherwise specified, nuts are to be either the regular hex series
analysis shall be performed if agreed upon by both parties. A
or a recessed hex series that allows penetration of the bolt
sample as required by Table 3 shall be selected for each lot.
threads into the nut recess area.
Chemical analysis shall be performed to the requirements of
13.1 and the result shall conform to Table 2. 8.2 Threads:
A,B
TABLE 2 Chemical Requirements
UNS
Other Elements
C
Designation Alloy General Name Aluminum Chromium Copper Iron Manganese Silicon Titanium Zinc Magnesium
Each Total
Number
A92024 2024 Aluminum 2024 Balance 0.10 3.8–4.9 0.50 0.30–0.9 0.50 0.15 0.25 1.2–1.8 0.05 0.15
A96061 6061 Aluminum 6061 Balance 0.04–0.35 0.15–0.40 0.7 0.15 0.40–0.8 0.15 0.25 0.8–1.2 0.05 0.15
D
A96262 6262 Aluminum 6262 Balance 0.04–0.14 0.15–0.40 0.7 0.15 0.40–0.8 0.15 0.25 0.8–1.2 0.05 0.15
A
Limits are in percent, maximum, unless shown as a range or stated otherwise.
B
Analysis shall regularly be made only for the elements specified in this table. If, however, the presence of other elements is suspected or indicated in amounts greater
than the specified limits, further analysis shall be made to determine that these elements are not present in excess of the specified
...
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