ASTM A563 Grade 10s Heavy Hex Nut ASME B18.2.2 High Strength Structural Steel

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: B18.2.2
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, GOST, BSW, En 10204 3.1 Mill Test Certificate
• Grade: 10s
• Material Standard: ASTM A563
• Proof Load: 150 Ksi (1034 MPa)
• Hardness: 248-352 Hb
• Matching Bolt: A325 / A490
• Application: Structural Steel / Bridge
• Transport Package: Carton Box
• Specification: 1/4-4"Customized size is available
• Trademark: G&T
• Origin: Made in China
• Production Capacity: 500 Tons/Month
• Package Size: 5.00cm * 5.00cm * 5.00cm
• Package Gross Weight: 0.050kg

Product Description

Product Description

Top: Core Specification Table

 

 

Item	Specification
Product Name	ASTM A563 Grade 10S Heavy Hex Nut
Dimension Standard	ASME B18.2.2
Material Grade	ASTM A563 Grade 10S (High Strength Structural Steel)
Hardness	248-352 HB
Surface Finish	Plain / Black Oxide / HDG / Zinc Plated (on request)
Certificate	EN 10204 3.1 MTC (Chemical Composition, Hardness, Proof Load)
Matching Bolt	ASTM A325 / A490 Structural Bolts

1. Material and Standard

What is ASTM A563 Grade 10S

A563 Grade 10S is a high strength structural steel nut grade. Its requirements are basically equivalent to ISO 4775 (Hexagon nuts for high strength structural bolting with large width across flats). Grade 10S is intended for use with A325 and A490 structural bolts.

Chemical Composition

 

 

Element	Composition (%)
Carbon (C)	0.30 - 0.55
Manganese (Mn) min	0.60
Phosphorus (P) max	0.040
Sulfur (S) max	0.050

Source: ASTM A563 standard specification

Mechanical Properties

 

 

Property	Value
Hardness	248-352 HB
Proof Load	Per ASTM A563 Table
Proof Stress	150 ksi (1034 MPa)

Source: ASTM A563 standard specification

Grade Comparison

 

 

Grade	Hardness (HB)	Matching Bolt	Application
2H	248-352	A193 B7	High temp / high pressure flanges
10S	248-352	A325 / A490	Structural steel connections
8S	150-250	A325	Structural steel connections

Note: A563 10S and A194 2H share a similar hardness range but serve different industries. 2H is for pressure flanges, 10S is for structural bolting.

2. Dimensions and Tolerances (ASME B18.2.2)

ASME B18.2.2 defines the dimensions for inch-series heavy hex nuts. Below is a reference dimension table for common sizes.

 

 

Nominal Size	Width Across Flats (in)	Thickness (in)
1/2"	0.875	0.437
5/8"	1.062	0.535
3/4"	1.250	0.617
7/8"	1.438	0.710
1"	1.625	0.813
1-1/8"	1.812	0.916
1-1/4"	2.000	1.019
1-3/8"	2.188	1.122
1-1/2"	2.375	1.225

Source: ASME B18.2.2 standard specification

Full dimension table available as PDF attachment.

3. Surface Finish Options

 

 

Finish	Standard	Corrosion Protection	Typical Application
Plain	-	None	Indoor, painted assemblies
Black Oxide	-	Mild	Indoor, sheltered
Zinc Plated	ASTM B633	Moderate	Outdoor, general
HDG	ASTM A153 / F2329	High	Outdoor, corrosive

For structural bolting, plain or HDG are the most common finishes. Zinc plating is generally not recommended for A490 bolts due to hydrogen embrittlement risk, but A563 10S nuts may be zinc plated when specified.

4. Inspection and Certificate (EN 10204 3.1)

Certificate Content

EN 10204 3.1 is an inspection certificate issued by the manufacturer's authorized representative, based on specific inspection of the actual delivered product. It must include:

• Chemical composition: Heat number level chemical analysis

• Hardness test: Actual hardness values of finished nuts

• Proof load test: Load bearing verification

• Heat number traceability: Complete traceability from heat number to finished product

Purpose of Certificate

Large buyers need the 3.1 certificate for incoming inspection and project audits. Without a 3.1 certificate, the buyer cannot prove material compliance to the end user or EPC.

5. Application

Structural Steel Connections

A563 Grade 10S heavy hex nuts are designed for high strength structural bolting. Typical applications include:

• Steel structures and buildings

• Bridges and infrastructure

• Tower and mast construction

• Industrial plants and equipment

• Transmission towers

Matching Recommendation

 

 

Nut Grade	Matching Bolt	Washer
A563 10S	A325 / A490	F436 Hardened Washer
A563 8S	A325	F436 Hardened Washer

For A490 bolts, A563 10S nuts are required. For A325 bolts, either 8S or 10S may be used depending on the specification.

6. Notes

1. Structural vs Pressure Application: A563 10S is for structural bolting (A325/A490). For pressure flange bolting (A193 B7), use A194 2H nuts.

2. Hardness: A563 10S hardness is 248-352 HB. This is similar to A194 2H but the two grades serve different industries and should not be interchanged without engineering approval.

3. Certificate Type: EN 10204 3.1 certificate must be based on the actual shipped batch. Do not use test data from other batches.

4. Metric Version: For metric structural nuts, specify ASTM A563M Grade 10S, which corresponds to ISO 4775.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Company Profile

Shanghai G&TIndustrial Co., Ltd., located in Jing'an District, Shanghai, offers OEM/ ODM services for fasteners. With over 20 years of experience in the production and export of high-quality standard fasteners, non-standard parts, which are widely used in various fields such as high-speed rail, ships, nuclear power, new energy, mechanical equipment, petrochemicals, aerospace, etc. We have provided high-quality fasteners to over 1,000 customers from more than 200 countries around the world. Main products include standard (German, American, Europe- an, Chinese standards) fasteners (bolts, stud bolts, threaded rod, nuts, washers, rivets, screws) and non-standard fasteners. Our raw material includes carbon steel, stainless steel, and alloy steel, as well as special material fasteners for special application scenari- os (ultra-high temperature, ultra-low temperature, strong corrosion). S30403,S30408,S31603,S31608,S32168,S31803,F304,F304L, F321,F316,F316L,316S31,316LN,316Ti,32550,32750,32760,F347,B8, B8M,B8T, B8C,B7,L7,B16, Gr7,660A\B\C\D, N4400,410, 420,600, 625, 655, 665, 718, 2205,2507,F51,F53, C276,17-4,825,925,N08020,25Cr2MOV,30CrMoA,35CrMoA,40Cr,42CrMo,etc.(Product size covers M3 to M150, with length ranging from 5 millimeter to 12 meters) We offer a one-stop fastener procurement solution, dedicated to providing a safer, more professional, more accurate and more efficient purchasing experience of fasteners for customers. If you have any needs, questions or inquiries, please feel free to contact us directly (the email suffix of the salesperson is our official website. You can visit our offi- cial website to learn more information).

 

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