Black Oxide U Bolts
Standard: DIN 3570
Thread Type: Coarse Thread, Partial Thread
Commodity: Black Oxide U Bolts
Also Named: U Shaped Bolt
Material: Carbon Steel
Property Class: 5
Diameter: 30、38、46、52、64、82、94、120、148、176、202、228、282、332、378、428、530
Finish: Plain, Black, Zinc Plated, Hot Dipped Galvanized, Oxidation, Dacromet, Phosphating, Cadmium Electroplate, Nickel Plated
Alternative Standard: ASME B 18.31.5、DIN 3570、JIS B 2809
MOQ: 1000kgs
Lead Time: 30 to 60 days
Product Introduction
AYA Fasteners (Hebei) Co., Ltd. is one of the most experienced manufacturers and suppliers of black oxide u bolts in China. Please feel free to buy high quality black oxide u bolts made in China here from our factory. For price consultation, contact us.

As a global supplier of customized fastening solutions, AYA's service process is also as close to customers as AYA's products. From describing needs to follow-up services, AYA will promptly and spare no effort to help customers solve any fastening problems that arise, to eliminate the concern of customers.
Product Description
Product Name | Black Oxide U Bolts |
Also Named | U Shaped Bolt |
Material | Carbon Steel |
Standard | DIN 3570 |
Property Class | 5 |
Diameter | 30、38、46、52、64、82、94、120、148、176、202、228、282、332、378、428、530 |
Finish | Plain, Black, Zinc Plated, Hot Dipped Galvanized, Oxidation, Dacromet, Phosphating, Cadmium Electroplate, Nickel Plated |
Thread Type | Coarse Thread, Partial Thread |
Dimensions Table

| Nominal Diameter d | 30 | 38 | 46 | 52 | 64 | 82 | 94 | 120 | 148 | |||
| d1 | 25~26.9 | 30~33.7 | 38~42.4 | 44.5~48.3 | 57~60.3 | 76.1 | 88.9 | 108~114.3 | 133~139.7 | |||
| d1 | tube size | Metric | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | |
| d1 | Inch | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | - | ||
| b ① | 40 | 40 | 50 | 50 | 50 | 50 | 50 | 60 | 60 | |||
| ds | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 16 | 16 | |||
| d3 | M10 | M10 | M10 | M10 | M12 | M12 | M12 | M16 | M16 | |||
| L ① | 70 | 76 | 86 | 92 | 109 | 125 | 138 | - | - | |||
| L1 | 28 | 31 | 37 | 40 | 49 | 57 | 66 | 171 | 191 | |||
| n | 40 | 48 | 56 | 62 | 76 | 94 | 106 | 136 | 164 | |||
| per 100 units ≈ kg | Type A | 9.4 | 10.5 | 12 | 12.9 | 22.2 | 25.9 | 28.8 | 64 | 72.7 | ||
| Type B | 6.8 | 7.7 | 9 | 9.7 | 16.8 | 19.8 | 22.4 | - | - | |||
| Nominal Diameter d | 176 | 202 | 228 | 282 | 332 | 378 | 428 | 530 | |||
| d1 | 159~168.3 | (191)~193.7 | 216~219.1 | 267~273 | 318~323.9 | 355.6~368 | 406.4~419 | 508~521 | |||
| d1 | tube size | Metric | 150 | -175 | 200 | 250 | 300 | 350 | 400 | 500 | |
| d1 | Inch | - | - | - | - | - | - | - | - | ||
| b ① | 60 | 60 | 70 | 70 | 70 | 70 | 70 | 70 | |||
| ds | 16 | 16 | 20 | 20 | 20 | 24 | 24 | 24 | |||
| d3 | M16 | M16 | M20 | M20 | M20 | M24 | M24 | M24 | |||
| L ① | - | - | - | - | - | - | - | - | |||
| L1 | 217 | 249 | 283 | 334 | 385 | 435 | 487 | 589 | |||
| n | 192 | 218 | 248 | 302 | 352 | 402 | 452 | 554 | |||
| per 100 units ≈ kg | Type A | 83.4 | 95.8 | 169.8 | 202.8 | 235 | 382 | 429 | 522 | ||
| Type B | - | - | - | - | - | - | - | - | |||
Product Details

Product Advantages

Advantages Of Black Oxide U Bolts
1. You will witness no build-up or rust when you buy the black U bolts
2. Among the fasteners, this is the most budgeted option you can buy for your machinery.
3. The black coating for U bolts is generally done on stainless steel, alloy, brass, copper, zinc, and iron.
4. You can use our black U Bolts for various piping solutions like restraining, elevating, and shipping the pipes.
5. You can use these bolts amicably under high pressure and in the most elevated temperatures with ease.
6. AYA manufactures and sells black U Bolts of the highest quality that are also permissible under international standards.
7. AYA black U bolts provide the highest resistance power under extreme pressure that is affordable globally by clients.
Quality Inspection

Every link in the production will be supervised by quality control personnel to ensure that the final product meets customer expectations.
Sophisticated testing instruments and experienced quality control personnel can provide customers with more accurate quality inspection reports.
Packaging & Container Loading

AYA's product packaging can not only provide very good protection to the product, but also improve the beauty of the product.
AYA provides custom labeling services.
Usage Scenarios

Why Choose AYA?

AYA provides exclusive services to 1000+ members from all over the world every year, with a unique chain service solution system, you only need to click the mouse to get exclusive fastening solution and enjoy door-to-door services.
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