Description

Carriage Bolts

Carriage bolts (round head with square neck) are commonly used in wood connections. The square neck under the round head will seat into the hole in the wood to prevent the head from turning. Because they are used with wood, carriage bolts are rarely high strength and virtually always supplied in a standard ASTM A307 specification.

Manufacturing

Taida Fasteners manufactures carriage bolts from 1/2" diameter through 1-1/4" diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions, carriage bolts larger than 1" in diameter, or bolt heads with your company's name and/or logo.

Standard Thread Length

Bolt lengths ≤ 6": Thread length = (2 X diameter) + 1/4"
Bolt lengths > 6": Thread length = (2 X diameter) + 1/2"

Note: Most stock carriage bolts have extended thread length.

Stock

Diameters: 3/8" - 3/4"
Lengths: 18" maximum
Origin: Import
Finish: Black and hot-dip galvanized

Dimensions

Bolt Diameter	D		C		H		P		F
	Body Diameter		Head Diameter		Head Height		Square Width		Square Depth
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
3/8	0.388	0.360	0.844	0.782	0.208	0.188	0.388	0.368	0.219	0.188
1/2	0.515	0.483	1.094	1.032	0.270	0.250	0.515	0.492	0.281	0.250
5/8	0.642	0.605	1.344	1.219	0.344	0.313	0.642	0.616	0.344	0.313
3/4	0.768	0.729	1.594	1.469	0.406	0.375	0.768	0.741	0.406	0.375
7/8	0.895	0.852	1.844	1.719	0.469	0.438	0.895	0.865	0.469	0.438
1	1.022	0.976	2.094	1.969	0.531	0.500	1.022	0.990	0.531	0.500
1-1/4*	1.277		2.850		0.531	0.500	1.250		0.625

*Dimensions per ASME B18.5 1990 (R 1998) cover diameters up to 1". Bolts over 1" use custom head dimensions.

Company profile

Ningbo Taida Hezhong Fastener Manufacturing Co., Ltd. is located at No. 286 Galaxy Road, Chengdong Industrial Park, Economic Development Zone, Xiangshan, Ningbo China. The company was founded in 2003 and covers an area of 13999 square meters, including a building area of 11899 square meters. The company has developed to a high professional level in the industry, specializing in the production of high-strength bolts, nuts, bolts, and non-standard special fasteners that are resistant to high pressure, high and low temperature, and corrosion, as well as high-strength bolts, nuts, bolts, and non-standard fasteners with independent research and development patents that never loosen. In recent years, the company has been committed to developing coating technology for various harsh environments and media, producing coating products to meet the anti-corrosion and acid-base requirements of bolt fasteners, making them widely used in petroleum drilling and production equipment, petrochemical equipment, pumps, valves, and seals, petrochemical pipeline containers, and marine engineering. Fasteners for equipment in highly corrosive and harsh environments such as platforms, oil well production, seawater/water injection and sewage pipelines, hydrogen energy electrolyte tanks, offshore wind power, land-based steel tower wind power, and mixed tower wind power.
Production levels include: 6.8, 8.8, 10.9, 12.9, 10.9HV, 10.9HR, 8.8HR, B7, B7M, B16, L7, L7M, L4 3, B 8, B8 M, 660A \ B \ C \ D, N4400, 410, 420, 600, 625, 655, 665, 718, 2205, 2507, F51, F53, C276, 17-4, 825, 925, N08020
Production range: Diameter M12~M100 (1/2 "~4"); Bolt length 25-200mm; The length of the tooth strip is 55-8800mm.

High Quality

The company has advanced production and inspection equipment, participates in the formulation of several international standards, and has abundant technical strength. It has won 5 national invention patents and 15 national utility model patents.

Advanced Equipment

The company has the most advanced automated stereoscopic warehouse storage system and 20tons - level AGV intelligent handling robots for fastener industry in Ningbo area.

Professional Team

The company has its own R & D team and several senior technical and quality management personnel.

Custom Service

Our company has complete production & testing equipment. Can develop and produce products according to the drawings or samples provided by customers

The Fatest Industrial equipments To Achieve Technology Consulti

The main equipment includes: 4 heat treatment Lines such as 80 meter long multi roll furnace, No. 6 mesh belt furnace, induction furnace and other heat treatment equipments; a robot - automatic hot forging bolt production machine; 21 full - automatic thread rolling machines; 3 multi - station cold forging machines; 9 chamfering - stamping machines; 1 dedicated production line for windpower anchor bolts; 3 turning - milling compound machines; 1 model - 100 peeling machine; 1 model - 40 peeling machine; 1 model - 100 straightening and calendering machine. The inspection equipment includes: 200 tons and 100 tons tensile strength testing machines; a fully automatic impact testing machines; an ultrasonic flaw detector; a magnetic particle flaw detectors; an eddy current flaw detector; 3 hardness test machines; a torque testing machine; a transverse vibration testing machine; a German Spectro desktop spectrometer; an American Niton handheld spectrometer; a projector; a metallographic analysis microscope, and other advanced laboratory equipment and dedicated vacuum-tight chamber .

We can provide a variety of fasteners, in line with national standards, the Ministry of Chemical Industry standards, the United States ASTM standards

Complete certificate: API-20E, API-20F, NORSOK M650/ISO17782，TUV Nande CE certification, TUV Nande AD2000 certification,ISO9001, ISO14001, ISO45001, to meet the needs of customers in many fields.

Diameter M12~M100 (1/2 "~4"); Bolt length 25-200mm; The length of the tooth strip is 55-8800mm.

During the development process, the company has always focused on the construction and improvement of the quality management system.