1/4′′-5/8′′ ANSI/ASME B18.5 Machinery Carriage Bolt Grade 2/5/8

• Customization: Available
• Material: High Strength Steel
• Type: Round Head
• Model NO.: 1/4′′-5/8′′; 2/5/8
• Head Style: Round
• Standard: DIN, ANSI, GB, JIS, BSW
• Grade: 8.8 10.9 12.9
• Application: Machinery, Chemical Industry, Environmental
• Finish: Blue-White Zinc Plated
• Certificate: SGS, ISO9001.IATF16949
• Model No.: ISO 8678
• Average Lead Time: Peak Season Lead Time: One Month off Season Lead
• Capacity: The Monthly Output Is 200, 000 Units
• Transport Package: Cartons+Plastic Bags
• Specification: 26.00cm * 26.00cm * 14.00cm
• Trademark: JX
• Origin: Hangzhou Zhejiang
• HS Code: 7318150000
• Production Capacity: 2000 Ton/Tons Per Quarter
• Package Size: 26.00cm * 26.00cm * 14.00cm
• Package Gross Weight: 20.000kg

Product Description

Round Head Square Neck Bolt / Carriage Bolt

A carriage bolt (also called coach bolt and round-head square-neck bolt) is a type of bolt. It is also known as a cup head bolt in Australia and New Zealand.

It is distinguished from other bolts by its shallow mushroom head and the fact that the cross-section of the shank, though circular for most of its length (as in other kinds of bolt), is square immediately beneath the head.^[2] This makes the bolt self-locking when it is placed through a square hole in a metal strap. This allows the fastener to be installed with only one wrench, working from the opposite end. The head of a carriage bolt is usually a shallow dome. The shank has no threads and its diameter equals the size of the square cross-section.

The carriage bolt was devised for use through an iron strengthening plate on either side of a wooden beam, the squared part of the bolt fitting into a square hole in the ironwork. It is common to use a carriage bolt on bare timber, the square section giving enough grip to prevent rotation.

Standard	ANSI/ASME B18.5/DIN603
Strength Grade	Gr 2, 5, 8; Gr 4.8, 8.8, 10.9
Material	Q195/35K/10B21/40CR/Stainless Steel 304
Size	Dia 1/4''-5/8'', M5-M20, or customized
Exterior Finish	Plain/Zinc/Black/Decromet
Package	Bulk in carton, small box, or customized

ASME B18.5

Nominal Size or Basic Diameter		E		A		H		J		T		U
		Body Diameter		Head Diameter		Head Height		Slot Width		Slot Depth		Fillet Radius
		Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1/4''	0.2500	0.2500	0.2450	0.4370	0.4180	0.1910	0.1750	0.0750	0.0640	0.1170	0.0970	0.0310	0.0160
5/16''	0.3125	0.3125	0.3070	0.5620	0.5400	0.2450	0.2260	0.0840	0.0720	0.1510	0.1260	0.0310	0.0160
3/8''	0.3750	0.3750	0.3690	0.6250	0.6030	0.2730	0.2520	0.0940	0.0810	0.1680	0.1380	0.0310	0.0160
7/16''	0.4375	0.4375	0.4310	0.7500	0.7250	0.3280	0.3020	0.0940	0.0810	0.2020	0.1670	0.0470	0.0160
1/2''	0.5000	0.5000	0.4930	0.8120	0.7860	0.3540	0.3270	0.1060	0.0910	0.2180	0.1780	0.0470	0.0160
9/16''	0.5625	0.5625	0.5550	0.9370	0.9090	0.4090	0.3780	0.1180	0.1020	0.2520	0.2070	0.0470	0.0160
5/8''	0.6250	0.6250	0.6170	1.0000	0.9700	0.4370	0.4050	0.1330	0.1160	0.2700	0.2200	0.0620	0.0310
3/4''	0.7500	0.7500	0.7420	1.2500	1.2150	0.5460	0.5070	0.1490	0.1310	0.3380	0.2780	0.0620	0.0310

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Hangzhou Jiangxin Industry Co., Ltd

Established in 2004, Hangzhou Jiangxin Industry Co., Ltd is a national high-tech enterprise and a scientific and technological enterprise in Zhejiang Province. We are a professional fastener manufacturer that integrates production, research and development, and sales. With our world-class fastener production equipment and advanced ERP system for management, we ensure top-notch quality and efficiency.

Our company holds the ISO9001 international quality management system certification and operates distribution outlets and logistics distribution centers in East China. We specialize in producing and supplying a wide range of standard and non-standard high-strength bolts and advanced expansion bolts. Our materials include various carbon steel and stainless steel 304 and 316, making our products suitable for high-speed rail, automobiles, ships, machinery, molds, electronics, and construction industries.

Our products are known for their exceptional performance, fast installation, beautiful appearance, compatibility, and stability. These advantages have made them highly favored by both Chinese and foreign merchants.

Business Varieties

• Bolts: outer hexagonal bolts, inner hexagonal bolts, carriage bolts, flange bolts, etc.
• Screws: machine screws, drilling screws, set screws, 12.9-grade plug screws, hexagonal wood screws, self-tapping screws
• Nuts: hexagonal nuts, K caps, nylon, stamped metal self-locking nuts, hexagonal flange nuts, cap nuts, rivet nut series, etc.
• Others: semi-hollow rivets, step rivets, and various non-standard tightening customization of firmware