Hexagonal screw A490

SKU: TO490

Hexagonal screw A490

ASTM A90 structural hex bolts of different diameters and lengths for use in structural connections. This type of screw must be used with hexagonal nut 2H or DH and flat washer F436.
$4.92$189.31
Tipo

Hexagonal screw

Grado

ASTM-A490

Material

Medium carbon steel

Dimensiones

ASME B18.6.3

Acabado

Pavonado

Cabeza

Hexagonal heavy

Cuerda

UNC Standard

Diámetro

1/2, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 1/2

Largo

1 1/4, 1 1/2, 1 3/4, 2, 2 1/4, 2 1/2, 2 3/4, 3, 3 1/4, 3 1/2, 3 3/4, 4, 4 1/4, 4 1/2, 5, 5 1/2, 6

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A490 or ASTM A490 bolts are high strength structural bolts used in structural steel connections. A490 Screws have heavy hex heads, a full diameter and are usually short in overall length since they are connecting steel to steel. Unlike A325 bolts, A490 bolts are higher strength bolts and are called structural because of their physical and chemical characteristics. These bolts range in diameter from 1/2″ to 1-1/2″ and are manufactured from medium carbon alloy steel that is cooled and tempered to develop the desired mechanical properties.

Structural Hexagonal Bolt ASTM A490

Screw dimensions
Diameter Body diameter (E) Width between faces (F) Width between corners (G) Rondana Head Height (H) Thread length (LT) Transition Thread Length (Y)
MAX MIN BASIC MAX MIN MAX MIN Max Min BASIC MAX MIN Ref Max Reference
1/2 .5000 0.515 0.482 7/8 0.875 0.850 1.010 .969 0.031 0.009 5/16 0.323 0.302 1.00 0.19
5/8 .6250 0.642 0.605 1 1/16 1.062 1.031 1.227 1.175 0.062 0.021 25/64 0.403 0.378 1.25 0.22
3/4 .75 0.768 0.729 1 1/4 1.250 1.212 1.443 1.383 0.062 0.021 15/32 0.483 0.455 1.38 0.25
7/8 .8750 0.895 0.852 1 7/16 1.438 1.394 1.660 1.589 0.062 0.31 35/64 0.563 0.531 1.50 0.28
1 1 1.022 0.976 1 5/8 1.625 1.575 1.876 1.796 0.093 0.62 39/64 0.627 0.591 1.75 0.31
1 1/8 1.12 1.149 1.098 1 13/16 1.812 1.756 2.093 2.002 0.093 0.062 11/16 0.718 0.658 2.00 0.34
1 1/4 1.25 1.277 1.223 2 2.000 1.938 2.309 2.209 0.093 0.062 25/32 0.813 0.749 2.00 0.38
1 3/8 1.3750 1.404 1.345 2 3/16 2.188 2.119 2.526 2.416 0.093 0.062 27/32 0.878 0.810 2.25 0.44
1 1/2 1.50 1.531 1.470 2 3/8 2.375 2.300 2.742 2.622 0.093 0.062 15/16 0.974 0.902 2.25 0.44
  Length tolerance:
Nominal Diameter Nominal length
Up to 6" More than 6"
½ -0.12 -0.19
5/8 -0.12 -0.25
¾ -0.19 -0.25
1 1/8 -0.25 -0,25
ASTM A490 Type 1
Descriptions Heavy hexagonal bolt made of medium carbon steel. The bearing should be flat and have a washer on the bottom and beveled ends.
Applications Used in structural joints for construction
Material Carbon steel
Heat treatment Heat treatment by quenching in a liquid above the austenitizing temperature, then tempered by reheating to a temperature of at least 800° F.
Hardness 1/2"-1" D: C24-35 Rockwell 1 1/8"-1 1/2" D: C19-31 Rockwell
Burden of proof 1/2"-1" D: 85,000 psi 1 1/8"-1 1/2" D: 74,000 psi
Performance Strength 1/2"-1" D: 92,000 psi min 1 1/8"-1 1/2" D: 81,000 psi min
Reduction of the area 1/2"-1" D: 120,000 psi min 1 1/8"-1 1/2" D: 105,000 psi min
 

A490 MECHANICAL PROPERTIES

Size Tension, ksi Performance, ksi Elong. %, min RA %, min
1/2 - 1-1/2 150-173 130 14 40

A490 CHEMICAL PROPERTIES

Screws Type 1
Element Sizes from 1/2 to 1-3/8 Size 1-1/2
Carbon, max 0.30 - 0.48% 0.35 - 0.53%
Phosphorus, max 0.040% 0.040%
Sulfide, max 0.040% 0.040%
Alloy elements * *
 
Screws type 3
Element Size 1/2 to 3/4 Size greater than 3/4
Carbon 0.20 - 0.53% 0.30 - 0.53%
Manganese, min 0.40% 0.40%
Phosphorus, max 0.035% 0.035%
Sulfide, max 0.040% 0.040%
Copper 0.20 - 0.60% 0.20 - 0.60%
Chromium, min 0.45% 0.45%
Nickel, min 0.20% 0.20%
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Molybdenum, min 0.15% 0.15%

A490 RECOMMENDED EQUIPMENT

Nuts Washers
Type 1 Type 3 T 1 T 3
A563DH A563DH3 F436-1 F436-3
Note: Nuts complying with A194 Grade 2H are a suitable substitute for use with A490 hex structural bolts.
  ASTM A490 bolts should not be coated with hot-dip galvanizing, mechanical deposition or zinc electroplating due to the potential risk of hydrogen embrittlement.  
Tipo

Hexagonal screw

Grado

ASTM-A490

Material

Medium carbon steel

Dimensiones

ASME B18.6.3

Acabado

Pavonado

Cabeza

Hexagonal heavy

Cuerda

UNC Standard

Diámetro

1/2, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 1/2

Largo

1 1/4, 1 1/2, 1 3/4, 2, 2 1/4, 2 1/2, 2 3/4, 3, 3 1/4, 3 1/2, 3 3/4, 4, 4 1/4, 4 1/2, 5, 5 1/2, 6