White Zinc Grade 2/5/8 Galvanized ANSI/ASME Coach Carriage Bolts Fasteners Factory Wholesale

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; A2-70, A4-70
Material	Q195/35K/10B21/40CR/Stainless Steel 304/316
Size	Dia 1/4''-1'', M5-M20, or customized
Exterior Finish	Plain/Zinc/Black/Decromet
Package	Cartons + pallets, or customized

DIN 603

Thread d		M5	M6	M8	M10	M12	M16	M20
P		0,8	1	1,25	1,5	1,75	2	2,5
b	l < 125mm	16	18	22	26	30	38	46
	125 < l < 200mm	22	24	28	32	36	44	52
	l > 200mm	-	-	41	45	49	57	65
dk	max.	13,55	16,55	20,65	24,65	30,65	38,8	46,8
	min.	12,45	15,45	19,35	23,35	29,35	37,2	45,2
ds	max.	5	6	8	10	12	16	20
	min.	4,52	5,52	7,42	9,42	11,3	15,3	19,16
f	max.	4,1	4,6	5,6	6,6	8,75	12,9	15,9
	min.	2,9	3,4	4,4	5,4	7,25	11,1	14,1
k	max.	3,3	3,88	4,88	5,38	6,95	8,95	11,05
	min.	2,7	3,12	4,12	4,62	6,05	8,05	9,95
r1	approx.	10,7	12,6	16	19,2	24,1	29,3	33,9
r2	max.	0,5	0,5	0,5	0,5	1	1	1
r3	max.	0,75	0,9	1,2	1,5	1,8	2,4	3
v	max.	5,48	6,48	8,58	10,58	12,7	16,7	20,84
	min.	4,52	5,52	7,42	9,42	11,3	15,3	19,16

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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Established in 2004, we are a professional fastener manufacturer based in Hangzhou, China. With almost 20 years of industry experience, we specialize in producing a wide range of imperial and metric fasteners, including DIN, ANSI, ASME, ISO, JIS, BSW, and more. Our product portfolio also extends to CUSTOM fasteners to meet specific requirements. Over the years, we have successfully exported our products to Europe, North America, and other regions, helping numerous suppliers and manufacturers expand their markets.

1. Bolts: hex head bolts, hex socket bolts, carriage bolts, flange bolts, etc
2. Screws: machine screws, self-drilling screws, set screws, 12.9 shoulder screws, hex head wood screws, self-tapping screws, etc
3. Nuts: hex nuts, k-nuts/k-lock nuts, nylon inserted nuts, stamped metal self-locking nuts, hex flange nuts, cap nuts, rivet nuts, etc
4.Non-standard fasteners: semi-hollow rivets, step rivets, etc