At Tormex we manufacture structural bolts with ASTM norms A307, A-325, A490, A193-B7, etcetera.
We have in stock A325 and A490 in diameters up to 1 1/2″
For A490 we can revise the bolts with magnaflux.

BOLTS A-307 GRADE A

Summary of standard only for general information

1. Dimensions

ANSI / ASME B18.2.1 HEX BOLTS

2. Chemical Composition

Max Carbon 0.29
Manganese 1.20 Max
Phosphorous 0.04 Max
Sulfur Max 0.15
Sulfur 0.15 Max

3. Toughness Requirements

Minimum 69 Rockwell B
Maximum 100 Rockwell B

4. Requirements Voltage

Tensile Strength 60 ksi Min

BOLTS A-307 GRADE B

Summary of standard only for general information

1. Dimensions

ANSI B18.2.1 HEX BOLTS HEAVY

2. Chemical Composition

Max Carbon 0.29
Manganese 1.20 Max
sulfur Max 0.05
Sulfur 0.05 Max

3. Toughness Requirements

Minimum 69 Rockwell B
Maximum 95 Rockwell B

4. Requirements Voltage

Voltage resistance wing 60 to 100 ksi

BOLTS A-394 T-0

Summary of standard only for general information

1. Dimensions

ANSI / ASME B18.2.1 HEX BOLTS

2. Chemical Composition

Carbon Max 0.55
Fosforo Max 0.048
Sulfur 0.058 Max

3. Toughness Requirements

Least 80 Rockwell B
Maximum 100 Rockwell B

4. Requirements Voltage

Tensile Strength 74,000 psi

SCREWS A-394 T-1

Summary of standard only for general information

1. Dimensions

ANSI / ASME B18.2.1 HEX BOLTS

2. Chemical Composition

Carbon 0.28 to 0.55
Manganese 0.60 Min
Fosforo Max 0.048
Sulfur 0.058 Max

3. Toughness Requirements

Minimum Rockwell C 25
Maximum 34 Rockwell C

4. Requirements Voltage

Tensile Strength psi 120 000

SCREWS A-325 TYPE 1

Summary of standard only for general information

1. Dimensions

ANSI B18.2.6 STRUCTURAL BOLTS

2. Chemical Composition

Carbon 0.30 to 0.52
Manganese 0.60 Min
Fosforo Max 0.040
Sulfur 0.050 Max
Silicon 0.15-0.30

3. Toughness Requirements

4. Requirements Voltage

Tensile Strength for Diameters 1/2 to 1 “Inclusive 120,000 psi minimum.
Tensile Strength Diameter 1 1/8 to 1 1/2 psi Minimum Even 105,000.

SCREWS A-490 Type 1

Summary of standard only for general information

1. Dimensions

ANSI B18.2.6 STRUCTURAL BOLTS

2. Chemical Composition

Alloy Steel
Carbon 1 3/8 screw up from 0.30 to 0.48
Carbon 1 1/2 screw 0.35 to 0.53
Fosforo Max 0.040
Sulfur 0.040 Max

3. Toughness Requirements

4. Requirements Voltage

SCREWS A-193 B7

Summary of standard only for general information

1. Dimensions

ANSI B18.2.1 except Hexagonal Head Screws Body diameter and radio

2. Chemical Composition

Steel SAE / AISI 4140

3. Toughness Requirements

To 2-1 / 2 Diámtero including 35 HRC Maximum

4. Mechanical Requirements

Tensile Strength 125,000 psi minimum.
Limit Cedencia 105,000 psi minimum.
Elongation at 4 Diameters 16% minimum.
Reduction of Area 50% minimum.

HEX

Summary of standard only for general information

1. Dimensions Hexnut Liviana

ANSI B18.2.2 HEX

2. Heavy Hex Dimensions

Compatibility Guide SCREW AND NUT

RULES

Summary of standards only for general information

1. Chemical Composition

2. Mechanical Properties

TORQUE VALUES OF REFERENCE

THESE VALUES SHOULD NOT BE USED FOR INSTALLATION OR INSPECTION. ONLY ARE ONE OF AVERAGES USED REFERENCE VALUES.

IT DEPENDS ON THE TORQUE CLEANING, FINISHING AND LUBRICATION OF THE ELEMENTS USED IN THE ASSEMBLY.

FORMULA

T = K * P * D
Where
T = Torque inch – pounds
K = factor may vary from 0.1 to 0.25
P = bolt tension in pounds
D = screw diameter Inches
For more information go to specialized information as: Steel Structures Technology Center Inc.

Screws structural weight A-325 and A-490

Nut (Kgs per 100 pieces)

Other products we can manufacture:

CONFIGURATION :

  • ANCHORS
  • STUDS
  • ASPARAGUS
  • ESCALONES
  • Hexagon socket cylindrical screws
  • Hexagon socket head screws
  • BOLTS MILL LINING
  • Eyebolts
  • VIA SCREWS
  • Countersunk screws GROOVE
  • BOLTS PLOWS
  • Head screws “T”
  • BOLTS CAR
  • HEAD FLANGE BOLTS 12 point
  • HEXAGON FLANGE BOLTS
  • HEXAGON WOOD SCREWS AND SQUARES
  • SQUARE HEAD BOLTS
  • HARDWARE TRANSMISSION TOWERS

MECHANICAL PROPERTIES:

SAE grades 1, 2, 5 AND 8
ISO 898-1 CLASSES 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 10.9 and 12.9
8 10.9, 12.9 AND
STAINLESS STEELS I-304 (18.8) and I-316 CLASS 1
GRADE B7M

SIZES:

Diameters ½ A 3 ”
diameter M76 M12 A

THREADS (ROPES):

METRIC INCH
THICK AND THIN

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