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Torsional-shear type (American standard)

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High-strength torsional-shear type for steel structures

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Product Description

　　Product Overview
　　1. ASTM F 1852 torsional-shear-type high-strength bolted connections for steel structures with a tensile strength of 120/105 ksi
　　2. ASTM F 2280 torsional-shear-type high-strength bolted connections for steel structures with a tensile strength of 150 ksi
　　Types and dimensions according to ASTM F 1852 and ASTM F 2280:

　　Technical Specifications of ASTM F1852

ASTM F1852 Torque-Shear Bolt/Nut/Washer Assembly Chart
	Bolt	nut	Washer
Type/Standard	ASTM F 1852	ASTM A563	ASTM F436
Performance Level	A325	ASTM A194 Grade 2	38-45HRC
Surface Treatment	Phosphorization	Phosphorization	Phosphorization

Bolted Joint Preload
Specifications	1/2”-13UNC	5/8”-11UNC	3/4”-10UNC	7/8”-9UNC	1”-8UNC	1-1/8”-7UNC
Bolt tightening axial force lbs/KN	13000/57.85	20,000/89.00	29000/129.05	41000/182.45	54000/240.30	59000/262.55

Bolt Mechanical Properties
Performance Level	Bolt specifications	Tensile Strength Ksi/MPa	Proof Load Ksi/MPa	Yield Strength Ksi/MPa	Rockwell hardness HRC
A 325	1/2” to 1”	120/827	85/586	92/634	25–34
A 325	1-1/8	105/724	74/510	81/558	19–30

Mechanical Properties of Nuts			Mechanical Properties of Washers
Performance Level	Proof Load Ksi/MPa	Hardness	Performance Level	Hardness
A 194 2H	144/993	78 HRB to 38 HRC	F 436	38–45 HRC

ASTM F2280 Technical specifications

ASTM F2280 Torque-Shear Bolt/Nut/Washer Assembly Chart
	Bolt	nut	Washer
Type/Standard	ASTM F 2280	ASTM A563	ASTM F436
Performance Level	A490	ASTM A194 Grade 2H	38-45HRC
Surface Treatment	Phosphorization	Phosphorization	Phosphorization

ASTM F2280 Fastening Axial Force for Bolted Joints
Specifications	1/2”-13UNC	5/8”-11UNC	3/4”-10UNC	7/8”-9UNC	1”-8UNC	1-1/8”-7UNC
Bolt tightening axial force lbs/KN	16000/71.2	25000/111.25	37000/164.65	51000/226.95	67000/298.15	84000/373.8

ASTM F2280 Mechanical Properties of Bolts
Performance Level	Bolt specifications	Tensile Strength Ksi/MPa	Proof Load Ksi/MPa	Yield Strength Ksi/MPa	Rockwell hardness HRC
A 490	1/2” to 1-1/8”	150–173/1034–1193	120/827	130/896	33–39

Mechanical Properties of Nuts			Mechanical Properties of Washers
Performance Level	Proof Load Ksi/MPa	Hardness	Performance Level	Hardness
A 194 2H	175/1207	24 HRC to 38 HRC	F 436	38–45 HRC