• tan@nbzyl.com

Hexagon Head bolt Coarse thread UNC UNF GR5 GR8

Short Description:

Our mainly products are high tensile hex bolts, nuts,washers with DIN, ISO,GB,ANSI standard hardware, we are factory with our own export department. Our factory has 19 years history. We have strict inspection system and ERP management system. Quality is the most important in our eyes.
If you can give us chance to offer and cooperate with you, you will find that we are a reliable and trustable suppliers in China.


Product Detail

Product Tags

UNC&UNF details

Production range:

Standard: ANSI B 18.2.1 UNC

Grade: Gr5,Gr8

Headmark: 3 lines for Grade 5, 6 lines for grade 8

Surface: Black , Zinc plated

● Place of origin: Ningbo, China

● Min quantity request: 900kgs per size

● Brand Name: ZYL

● Material: 35k 45k 40Cr etc

● Dia: 1/2", 3/4",5/8",7/8",1", 1 1/4",1 1/2", 1 3/4",2"

● Length:  no limited

External UNC hexagon bolts standard and dimensions


The difference between coarse thread and fine thread

1. The pitch of coarse teeth is large and that of fine teeth is small. 2. Thick ones have high strength, while thin ones are well sealed. 3. Coarse-tooth bolt pattern has stronger fatigue resistance, which is convenient for frequent disassembly, fine-tooth self-locking ability, large bottom diameter and strong static load capacity.

What are UNC&UNF bolts made of?

UNC&UNF bolts are made of carbon steel C1035 C1045 for Gr5, 40Cr for Gr8

What are UNC&UNF bolts coated with?

Black oxide、Zinc Plated、dacromet

What are the grade properties of UNC&UNF bolts?

Gr5、 Gr8


1. Are you a UNC&UNF bolt manufacturer?

Yes, we are a UNC&UNF bolt factory.

2. What does your company have?

We mainly produce hex bolts, hex head flange bolts, Hexagon Socket Head Cap Screws, stud bolts, hex nuts, etc.

3. How does the payment process work?

According to the specific situation, our payment terms are flexible. Generally, we recommend 30% deposit, and the balance against copy B/L

4. What about after-sales?

When our metal parts are suitable for your products, we will follow up and wait for your feedback. Our experienced engineers are willing to help with any problems related to our metal parts.

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