ASTM A 307, Grade A; [ASTM A 325M ASTM A 325, Type 1], [ASTM A 490M ASTM A
490, Type 1]. The bolt heads and the nuts of the supplied fasteners must
be marked with the manufacturer's identification mark, the strength grade
and type specified by ASTM specifications.
2.2.1.2
Nuts
ASTM A 563M, Grade A , heavy hex style, except nuts under M36 may be
provided in hex style. ASTM A 563, Grade and Style for applicable ASTM
bolt standard recommended.
2.2.1.3
Washers
ASTM F 844 washers for ASTM A 307 bolts, and ASTM F 436M ASTM F 436 washers
for ASTM A 325M ASTM A 325 and ASTM A 490M ASTM A 490 bolts.
2.2.2
High-Strength Structural Steel [and Structural Steel Tubing]
2.2.2.1
Bolts
**************************************************************************
NOTE: Do not galvanize ASTM A 490 bolts. When
galvanizing ASTM A 325 bolts limit hardness of bolts
to Rockwell C-32.
**************************************************************************
**************************************************************************
NOTE: Do not mix bolt material specifications ASTM
A 325M and ASTM A 490M ASTM A 325 and ASTM A 490 on
the same diameter bolts in high strength
connections. Do not place ASTM A 325M and ASTM A
490M ASTM A 325 and ASTM A 490 bolts, which have a
hardness equal or in excess of Rockwell C-32, in
contact with a galvanized surface. The ASTM A 325M
and ASTM A 490M ASTM A 325 and ASTM A 490 bolts
specified are for a maximum diameter of M36 1.5
inches. If larger bolts are required, include the
following ASTM publications in reference article:
ASTM A 354 - Quenched and Tempered Alloy Steel
Bolts, Studs, and Other Externally Threaded Fasteners
ASTM A 449 - Quenched and Tempered Steel Bolts and
Studs.
**************************************************************************
ASTM A 325M ASTM A 325, Type 1 ASTM A 490M
ASTM A 490, Type 1 or 2.
2.2.2.2
Nuts
ASTM A 563M ASTM A 563, Grade and Style as specified in the applicable ASTM
bolt standard.
2.2.2.3
Washers
ASTM F 436M ASTM F 436, plain carbon steel.
SECTION 05120
Page 17
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