Heavy Hex Bolts
SeveralASTM specificationsrequire a hex head that is larger than a standard (finished) hex head. These specifications include: A193, A320and A307B. Although A325 andA490bolts also require a heavy hex head, please refer to Structural Boltsfor dimensional specifications, since these bolts have shorter thread lengths than standard heavy hex bolts.
Manufacturing
Taida Bolt manufactures heavy hex bolts from 1/2" diameter through 2-1/2" diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your company's name and/or logo.
|
TYPE 1
|
Medium carbon and alloy steel.
|
|
TYPE 2
|
Withdrawn in 2002.
|
|
TYPE 3
|
Weathering steel.
|
|
|
|
|
M
|
Metric A490.
|
|
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.
|
|
Size
|
Tensile, ksi
|
Yield, ksi
|
Elong. %, min
|
RA %, min
|
|
1/2 - 1-1/2
|
150-173
|
130
|
14
|
40
|
|
Nuts
|
Washers
|
||
|
Type 1
|
Type 3
|
Type 1
|
Type 3
|
|
A563DH
|
A563DH3
|
F436-1
|
F436-3
|
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.
01
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.
02
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.
03
Professional Team
The company has its own R & D team and several senior technical and quality management personnel.
04
Custom Service
Our company has complete production & testing equipment. Can develop and produce products according to the drawings or samples provided by customers
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.
200 ton and 100 ton tensile strength testing
fully automatic impact testing machines
hardness machines
Magnetic particle testing machine permeation chamber