ASTM A490 Bolts

ASTM A490 Bolts


ASTM A490 Bolts particular secured extinguished and tempered, compound steel, overwhelming hex basic jolts from 1/2″ breadth through 1-1/2″ measurement with a base 150 ksi ductile. These jolts are expected for use in auxiliary associations and in this manner have shorter string lengths than standard hex jolts.

A490 screws are comparable in application and measurements to A325 overwhelming hex auxiliary screws however are produced using a combination steel as opposed to a medium carbon steel, bringing about a higher quality latch. The A490 particular is relevant to substantial hex auxiliary jolts as it were.

ASTM A490 Bolts jolts will not be covered by hot-plunge stirring, mechanical testimony, or electroplating with zinc because of the potential danger of hydrogen embrittlement. ASTM has endorsed covering A490 jolts with Zinc/Aluminum Corrosion Protective Coatings per ASTM F1136 Grade 3, economically called Geomet. Extra testing as Magnetic Particle Inspection for Longitudinal Discontinuities and Transverse Cracks is a prerequisite of the A490 detail.

ASTM A490 Bolts Specification covers material for extinguished and tempered Alloy Steel Bolting material for auxiliary application.This Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength.ASTM A490 Bolts is appropriate to Heavy hex head Bolts only.A490 determined jolts Should not be covered by hot-plunge galvanizing,any mechanical testimony, or electroplating with zinc because of the potential danger of hydrogen embrittlement.

ASTM A490 Bolts are proposed for auxiliary applications which implies they are of a more grounded review as well as highlight shorter strung lengths of the dart to maintain a strategic distance from obstruction with the joint. There are presently two distinct kinds of evaluations for both Imperial and Metric ASTM A490 Bolts jolts which are Type 1 Type 2, and Type 3 as demonstrated by fluctuating evaluation ID markings on the jolt heads. Type 2 was pulled back from the detail in 2002.


Useful Information of ASTM A490 Bolts

Threads: METRIC, BSW, BSF, UNC, UNF or as required
Standard: DIN 933, DIN 931, ANSI, JIS standards
In Form of: Hex
Threading as per Gauge Etc.
Head drive: Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
Packing: IN BULK :canton/pallet, Small Boxs/carton/ pallet, or customer request
Test Certificate: Manufacturer Test Certificate as per EN 10204 / 3.1
Property Class: For Bolts & Screws: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H
For Nuts: A2-70, A2-80, A4-70, A4-80, F594C, F594D, F594G, F594H, A2-035, A4-040
For SHCS: F837B, F837C, F837E, F837
For Threaded Rods: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H, B8, B8M CL1 & CL2
Finish: Passivated
Origin and service-region: European
Origin of 304 Stainless Steel Nuts are Western European. However projects with eastern origin are possible on request.
Stainless Steel Grades: AISI 304, AISI 304L, AISI 316, AISI 316L, AISI 309, AISI 310, AISI 317L, AISI 321, AISI 347, AISI 409, AISI 410, AISI 420, AISI 430, AISI 446, AISI 202 Etc.
Surface Coating: Hot Dipped Galvanizing Fasteners
Phosphate Fasteners
Teflon Fasteners
Ptfe Coated Fasteners
Xylon Fasteners
Zinc Fasteners
Cadmium Fasteners


Available standards Stainless Steel 490 Bolts

Material Size Length Specification Manufacturer
Stainless Steel 490 Fasteners M 02 to M 160 3 mm DIN GKW
to  ISO Unbrako
200 mm JIS Kundan
  IS Sundaram Precision
  BS Infasco
  ASTM EBY Fastener Etc.

A490 Types

 TYPE 1 Medium carbon and alloy steel.
 TYPE 2 Withdrawn in 2002.
 TYPE 3 Weathering steel.
M Metric A490.


Connection Types

SC Slip critical connection.
N Bearing type connection with threads included in the shear plane.
X Bearing type connection with threads excluded from the shear plane.


Chemical Composition

Element Type 1 % Type 3 %
Carbon 0.20 - 0.53 (3/4" and smaller) 0.30 - 0.48 (sizes through 1-3/8")
0.30 - 0.53 (larger than 3/4") 0.35 - 0.53 (for 1-1/2")
Manganese, min 0.400 --
Phosphorus, max 0.035 0.040
Sulfur, max 0.040 0.040
Copper 0.20 - 0.60 --
Chromium, min 0.45 --
Nickel, min 0.20 --
Molybdenum, min 0.15 --


Mechanical Properties

Nominal Diameter, inch Tensile Strength, min, ksi Yield Strength, min, ksi Elongation in 4D, min, % Reduction in Area, min, %
1/2" to 1-1/2", Inclusive 150 - 173 130 14 40


Hardness Requirements

Bolt Size, mm Bolt Length*, mm Brinell Rockwell C
min max min max
1/2" to 1", inclusive Less than 2D* 311 352 33 39
1/2" to 1", inclusive 2D and over -- 352 -- 39
1-1/8" to 1-1/2", inclusive Less than 3D 311 352 33 39
1-1/8" to 1-1/2", inclusive 3D and over -- 352 -- 39




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