ASTM A490 Type 1 Structural Heavy Hex Bolts Black Finish

• Customization: Available
• Material: High Strength Steel
• Type: Hexagon Head
• Model NO.: HEX BOLTS
• Head Style: Hexagonal
• Standard: ANSI
• Finish: Black
• Transport Package: 25kgs Carton Box + 36 Ctns Wooden Pallet
• Specification: 1/2"-1 1/2"
• Trademark: M
• Origin: Ningbo
• HS Code: 7318151001
• Production Capacity: 5000ton/Month

Product Description

Product Name	ASTM A490 B7 B8 hex bolt, heavy hex bolt
Material	Stainless steel
Color	Polish, Passication
Standard	DIN,ASME,ASNI,ISO
Grade	B7/B8
Finished	Polish, Passication
Thread	coarse, fine
Used	building industry machinery

Prior to its withdrawal in 2016, the ASTM A490 specification covered quenched and tempered, alloy steel, heavy hex  structural bolts from 1/2″ diameter through 1-1/2″ diameter with a minimum 150 ksi tensile. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Refer to the Structural Bolts page of our site for thread lengths and other related dimensions. A490 bolts are similar in application and dimensions to A325 heavy hex structural bolts but are made from alloy steel rather than medium carbon steel, resulting in a higher strength fastener. The A490 specification is applicable to heavy hex structural bolts only. For bolts with different thread lengths than specified for structural bolts but with similar mechanical properties, see Specification A354 grade BD. ASTM A490 bolts shall not be coated by hot-dip galvanizing, mechanical deposition, or electroplating with zinc due to the potential risk of hydrogen embrittlement. ASTM has approved coating A490 bolts with Zinc/Aluminum Corrosion Protective Coatings per ASTM F1136 Grade 3, commercially called Geomet. Additional testing in the form of Magnetic Particle Inspection for Longitudinal Discontinuities and Transverse Cracks is a requirement of the A490 specification.

A490 Types

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TYPE 2	Withdrawn in 2002.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

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.

A490 Mechanical Properties

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

A490 Chemical Properties

Type 1 Bolts
Element	Sizes 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%
Sulfur, max	0.040%	0.040%
Alloying Elements	*	*
* Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum range given for the content of alloying elements exceeds one of more of the following limits: Manganese, 1.65%, silicon, 0.60%, copper, 0.60%, or in which a definite range or a minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99%, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium or any other alloying elements added to obtain a desired alloying effect.

Type 3 Bolts
Element	Sizes 1/2 to 3/4	Size above 3/4
Carbon	0.20 - 0.53%	0.30 - 0.53%
Manganese, min	0.40%	0.40%
Phosphorus, max	0.035%	0.035%
Sulfur, 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%
or
Molybdenum, min	0.15%	0.15%

A490 Recommended Hardware

Nuts	Washers
Type 1	Type 3	Type 1	Type 3
A563DH		A563DH3	F436-1	F436-3

The Ningbo Beilun Milfast Metalworks Co., Ltd. is a professional fasteners company in Ningbo, specialize in the Threaded Rods, Studs, Bolts, Nuts, Washers and the Stamping metal parts. With the products quality and good service, we have gained the credit from our customers.

The Milfast Metalworks products include various different specifications and types:
THREADED RODS, STUD BOLTS, HEAVY HEX BOLTS, STRUCTURAL BOLTS, HEX BOLTS, FLANGE BOLTS, TRACK BOLTS, CARRIAGE BOLTS, HEAVY HEX NUTS, STRUCTURAL NUTS, HEX NUTS, FLANGE NUTS, CASTLE NUTS, SQUARE NUTS, FLAT WASHERS, SPRING WASHERS, SPECIAL FASTENERS AND OTHER VARIOUS METAL PARTS.
Ningbo Beilun Milfast Metalworks Co.,Ltd produce high-quality fasteners standard Threaded Rods, bolts, nuts, stud bolts, washers as follows, 
ASTM A325/A325M/A490/A490M Type 1 Structural Bolts, A193/A193M Gr.B7/B7M Heavy Hex Bolts, ASTM A307 Hex Bolt, DIN912 Socket Head Cap Screws, DIN6914 Structural Bolts, EN14399-3/EN14399-4 Heavy Hex Bolts, DIN931/933 Hex Bolts, DIN960/961 Hex Bolts, ISO4014/4017 Hex Bolts, DIN6921 Flange Bolts
ASTM A194/A194M Gr. 2H/2HM, 7/7M Heavy Hex Nuts, A563/A563M Gr. C/DH/10S Heavy Hex Nuts, DIN6915 Structural Nuts, EN14399-3/EN14399-4 Heavy Hex Nuts, DIN934 Hex Nuts, ISO4032 Hex Nuts, DIN6923 Flange Nuts
ASTM A193/A193M Gr. B7/B7M, B16, B8/B8M, ASTM A320 Gr.L7/L7M Threaded Rod/Stud Bolts, DIN975 Threaded Rods
ASTM F436 Hardened Flat Washer, SAE/USS Flat Washer, ISO7089 Round Flat Washer, DIN125 Flat Washers, DIN6916 Structural Washer, EN14399-5/EN14399-6 Flat Washer, DIN127 Spring Washer, F959 DTI Washer
Based on the standard system, Ningbo Beilun Milfast Metalworks Co.,Ltd control each link to ensure the factory can produce the high-leave quality products, from raw material to the production process in strict management to ensure products quality. It successfully won the customer very satisfactory according to this process.

The Milfast Metalworks main products ASTM A193-B7 Threaded Rods, A194 Gr. 2H Heavy Hex Nuts, ASTM A325 Structural Bolts, ASTM F436M Hardened Flat Washers, they are widely spread all over the world, include the Country from America, Europe, Middle East, Africa, Etc
We′re confident to provide you with high-quality products, competitive prices, timely delivery and perfect after-sales service. The Milfast target is to create a win-win business model and establish long-term business relationship with our partner in future.