**China Supplier of All Types DIN931 & DIN933 Hex Bolts and Nuts**
A bolt is a type of threaded fastener with an external male thread, often confused with screws. A hex cap screw features a hexagonal head designed to be driven by a wrench or spanner. ASME B18.2.1 compliant cap screws have tighter tolerances compared to hex bolts, ensuring they fit in places where hex bolts might not.
Here’s the detailed specification of our products:
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**Product Name:**
Hex Head Hot Forged Large Bolt in Big Size
**Standards:**
DIN, ASTM/ANSI, JIS, EN, ISO, AS, GB
**Material Options:**
- **Stainless Steel:** SS201, SS303, SS304, SS316, SS316L, SS904L, F593
- **Steel Grades:** DIN: Gr. 4.6, 4.8, 5.6, 5.8, 8.8, 10.9, 12.9; SAE: Gr. 2, 5, 8; ASTM: 307A, 307B, A325, A394, A490, A449
**Finishing Options:**
Zinc (Yellow, White, Blue, Black), Hot Dip Galvanized (HDG), Black Oxide, Geomet, Dacromet, Anodization, Nickel Plated, Zinc-Nickel Plated
**Production Process:**
- M2-M24: Cold Forging
- M24-M100: Hot Forging
- Machining and CNC for Customized Fasteners
**Customized Products Lead Time:**
- Busy Season: 15–30 Days
- Slack Season: 10–15 Days
**Stock Products Available:**
- **Steel:** 4.8 Grade DIN6923, 8.8 Grade, 10.9 Grade of GB5783 and GB5782
- **Stainless Steel:** All DIN Standard Stainless Steel Bolts
**Free Samples:**
Available for standard fasteners
**Visit Us:**
For more information, please visit: [www.hainafastener.com](http://www.hainafastener.com)
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**Our Services:**
- **Professional Manufacturer:** We design and manufacture all fasteners according to your specifications and performance requirements.
- **Quality Guaranteed:** We conduct durability testing and use advanced technical designs to ensure long-lasting performance.
- **Cost-Effective:** Competitive pricing with direct factory supply.
- **Perfect Fastening Solution:** With 20 years of experience, we provide a wide range of parts to meet your needs.
- **Customized Fasteners:** We offer custom solutions based on your samples or drawings.
If you're unsure about what you need, feel free to contact us anytime—we’re here to help!
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ZHEJIANG UNIVERSE FILTER CO.,LTD. , https://www.unifil.com