U bolts are very common in construction and automobile manufacturing. U bolt manufacturers are made of strong and durable materials. And you can customize different materials and sizes. U bolts can be made of many different materials. Common ones are carbon steel U bolts and stainless steel U bolts. Stainless steel is strong and durable and can carry heavy pressure.

Pipe outer diameter Da (mm)	Bending radius R (mm)	Thread specification d	Total length (mm)	U-shaped opening width a (mm)	Leg spacing b (mm)	Threaded section length m (mm)
14	8	M6	98	33	22	22
18	10	M10	108	35	26	-
22	12	M10	135	42	28	34
25	14	M10	143	44	38	-
33	18	M10	160	48	46	-
38	20	M12	192	55	32	52
42	22	M12	202	57	56	-
45	24	M12	210	59	60	-
48	25	M12	220	60	62	-
51	27	M12	225	62	66	-
57	31	M12	240	66	74	-
60	32	M12	250	67	76	-
76	40	M12	289	75	92	-
83	43	M12	310	78	98	-
89	46	M12	325	81	104	-
102	53	M16	365	93	38	122
108	56	M16	390	96	-	-
114	59	M16	405	99	-	-
133	69	M16	450	108	-	-
140	72	M16	470	112	-	-
159	82	M16	520	122	-	-
165	85	M16	538	125	-	-
219	112	M16	680	152	-	-

304 Stainless Steel (e.g., SUS304/06Cr19Ni10): The most commonly used material, offering good corrosion resistance. Suitable for most general environments, such as food processing machinery, doors and windows, general chemical equipment, and humid environments.

316 Stainless Steel (e.g., SUS316/06Cr17Ni12Mo2): Due to the presence of molybdenum (Mo), it has stronger resistance to acid, alkali, and salt spray (e.g., seawater, chemical plants) corrosion.  Suitable for more demanding corrosive environments, such as coastal facilities and chemical pipelines.

Generally, you can follow the sequence of "determine pipe diameter → select material → verify standards → procure matching components" when making your purchase. If you can provide the specific application scenario (for example, whether it's for outdoor water pipes, chemical plant pipelines, or mechanical equipment), I can provide more specific material and specification recommendations. Contact Email: info@fixdex.com