Customization: | Available |
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Material: | High Strength Steel |
Type: | Round Head |
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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 |
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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