DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical
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Product Highlights
- Manufactured from 904L (UNS N08904) super austenitic stainless steel with low carbon (0.02%)
- This material offers exceptional resistance to sulfuric acid, phosphoric acid, acetic acid, and chloride-induced pitting and stress corrosion cracking, outperforming 304 and 316L in aggressive chemica
- The integrated nylon insert provides prevailing torque, effectively preventing loosening under vibration, thermal cycling, and dynamic loads.
- Fully compliant with both DIN 985 (European standard) and ASTM A194 Heavy Hex (American standard), enabling one-stop procurement for global projects across European and North American markets.
- With high nickel (24%), molybdenum (4.3%), and copper (1.5%) content, this nut maintains its integrity in wet chlorine, hypochlorite, and strong oxidizing environments, making it the ideal choice
- The 904L alloy provides stable mechanical properties from -60degreeC to 400degree C, with a minimum tensile strength of 490 MPa
- Every batch is supplied with a full EN 10204 3.1 Mill Test Certificate, documenting complete chemical composition and mechanical properties, along with PMI verification
- Specifically engineered for refineries, chemical reactors, heat exchangers, offshore platforms, and FGD systems, ensuring long-term reliability and reduced maintenance costs in the world's most aggres
Product Attributes
- Customization
- Available
- Material
- 904L (Uns N08904 1.4539)
- Type
- Hexagon Head
- Model NO.
- DIN 985 / ASTM A194
- Connection
- Nut
- Head Style
- Hexagonal
- Standard
- DIN, DIN 985 / ASTM A194
- Grade
- 904L (Uns N08904 1.4539)
- Locking Mechanism
- Nylon Insert (Prevailing Torque)
- Mechanical Properties
- Tensile ≥ 490 MPa, Elongation ≥ 35%
- Temperature Range
- -60°C to +400°C
- Delivery Time
- 10-45 Days
- Surface Finish
- Plain / Passivated
- Transport Package
- Plastic Bag+ Carton+Wood Pallet
- Specification
- M3 - M48 (Customized Available)
- Trademark
- G&T
- Origin
- Shanghai, China
- Production Capacity
- 50 Tons/Month
- Package Size
- 5.00cm * 5.00cm * 5.00cm
- Package Gross Weight
- 0.002kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical
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DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical -
DIN 985 Nylon Insert Lock Nut 904L Uns N08904 ASTM A194 Heavy Hex M6 M8 En10204 3.1 Petrochemical
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Product Description
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Product features
1. Certified Super Austenitic Material (904L / UNS N08904)
Manufactured from 904L (UNS N08904) super austenitic stainless steel with low carbon (≤0.02%). This material offers exceptional resistance to sulfuric acid, phosphoric acid, acetic acid, and chloride-induced pitting and stress corrosion cracking, outperforming 304 and 316L in aggressive chemical environments.
2. Superior Anti-Loosening Nylon Insert Design
The integrated nylon insert provides prevailing torque, effectively preventing loosening under vibration, thermal cycling, and dynamic loads. This design ensures reliable clamping force in critical petrochemical equipment where maintenance access is limited.
3. Dual Standard Compliance (DIN 985 + ASTM A194)
Fully compliant with both DIN 985 (European standard) and ASTM A194 Heavy Hex (American standard), enabling one-stop procurement for global projects across European and North American markets.
4. Extreme Corrosion Resistance in Harsh Media
With high nickel (24%), molybdenum (4.3%), and copper (1.5%) content, this nut maintains its integrity in wet chlorine, hypochlorite, and strong oxidizing environments, making it the ideal choice for flue gas desulfurization (FGD) and seawater treatment systems.
5. Excellent Mechanical Stability Over Wide Temperature Range
The 904L alloy provides stable mechanical properties from -60°C to 400°C, with a minimum tensile strength of 490 MPa and elongation ≥35%, ensuring reliable performance in thermal cycling applications without brittle fracture.
6. Complete Material Traceability with EN 10204 3.1
Every batch is supplied with a full EN 10204 3.1 Mill Test Certificate, documenting complete chemical composition and mechanical properties, along with PMI verification. This ensures 100% acceptance for rigorous EPC project audits.
7. Precision Cold Forging & Surface Passivation
Manufactured using precision cold-forging and rolling processes, resulting in high thread accuracy and a smooth, burr-free surface. Available with passivation treatment for enhanced corrosion resistance and easy assembly.-
8. Perfect Mating with 904L Stud Bolts
Designed to pair seamlessly with 904L hex bolts and stud bolts from the same material grade, ensuring uniform load distribution and eliminating galvanic corrosion risks in mixed-material assemblies.
9. Cost-Effective Alternative to Nickel Alloys
While offering corrosion resistance comparable to expensive nickel alloys like Hastelloy, 904L provides a more budget-friendly solution for petrochemical and chemical processing applications, delivering superior value.
10. Oil & Gas / Petrochemical Optimized Applications
Specifically engineered for refineries, chemical reactors, heat exchangers, offshore platforms, and FGD systems, ensuring long-term reliability and reduced maintenance costs in the world's most aggressive corrosive environments.
Description
What are lock nuts used for?
Ordinary nuts provide clamping force to a bolt or screw to prevent axial movement. When the application involves vibration, the nuts risk loosening, risking damage to the application. This is where lock nuts prove their worth: they resist vibration and shock.
| Standard: | ASME/ANSI B18.2.2; DIN985, DIN982 |
| Diameter: | 1/4''-3-1/2''; M3-M72 |
| Material: | Carbon Steel, Alloy Steel, Stainless Steel |
| Grade: | IFI-101,IFI-100/107 2007,SAE J995 Gr.2, 5,8; CL4, 5, 6, 8, 10, 12 |
| Thread: | M, UNC, UNF |
| Finish: | Plain,Black oxide, Zinc Plated(Clear/Blue/Yellow/Black), H.D.G, Nickel, Chrome,PTFE,Dacromet,Geomet,Magni,Zinc Nickel,Zinteck. |
| Packing: | bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand |
| Application: | Structural Steel; Metal Buliding; Oil&Gas;Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating |
| Equipments: | Caliper, Go&No-go gauge, Tensile test machine, Hardness tester, Salt spraying tester, H.D.G thickness tester, 3D detector, Projector, Magnetic flaw detecter |
| Supply Ability: | 1000 tons per month |
| MinimumOrder: | according to customer demand |
| Trade Term: | FOB/CIF/CFR/CNF/EXW/DDU/DDP |
Company Introduction
Testing Machine
Packing & Shipping
Cetificate
Exhibition
FAQ
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASR254666". Items marked "
" are certified.
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Company Profile
Shanghai G&T Industrial Co., Ltd., located in Jing'an District, Shanghai, offers OEM/ ODM services for fasteners. With over 20 years of experience in the production and export of high-quality standard fasteners, non-standard parts, which are widely used in various fields such as high-speed rail, ships, nuclear power, new energy, mechanical equipment, petrochemicals, military equipment, aerospace, etc.
We have provided high-quality fasteners to over 1, 000 customers from more than 200 countries around the world. Main products include standard (German, American, European, Chinese standards) fasteners (bolts, stud bolts, threaded rod, nuts, washers, rivets, screws) and non-standard fasteners. Our raw material includes carbon steel, stainless steel, and alloy steel, as well as special material fasteners for special application scenarios (ultra-high temperature, ultra-low temperature, strong corrosion).
S30403, S30408, S31603, S31608, S32168, S31803, F304, F304L, F321, F316, F316L, 316S31, 316LN, 316Ti, 32550, 32750, 32760, F347, B8, B8M, B8T, B8C, B7, L7, B16, Gr7, 660A\B\C\D, N4400, 410, 420, 600, 625, 655, 665, 718, 2205, 2507, F51, F53, C276, 17-4, 825, 925, N08020, 25Cr2MOV, 30CrMoA, 35CrMoA, 40Cr, 42CrMo, etc. (Product size covers M3 to M150, with length ranging from 5 millimeter to 12 meters)
We offer a one-stop fastener procurement solution, dedicated to providing a safer, more professional, more accurate and more efficient purchasing experience of fasteners for customers. If you have any needs, questions or inquiries, please feel free to contact us directly (the email suffix of the salesperson is our official website. You can visit our official website to learn more information).
1.20 years of experience
2. Competitive price
3. Fast delivery
4. Professional quality inspection
5. One-stop procurement solution.
6. Efficient communication.
7. Offer OEM/ ODM services
About Our Factory & Business Background
- Address
- Room 1702-1703, No. 899 Haining Road, Jing'an District, Shanghai, China
-
Plant Area
- 697 square meters
-
Number of Employees
- 32
-
Registered Capital
- 8,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 1 Pc
-
Supply Chain Partners
- 120
Our Production Capability & Technical Expertise
-
Main Products
- Bolt, Nut, Threaded Rod, Stud Bolts, Customized Fastener
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 2 people
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2015-03-31
-
Export Year
- 10 Years
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, Australia
-
Number of Foreign Trading Staff
- 15
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015
FAQ
- Why choose us?
- We provide first-class services in the supply of quality fasteners minimizing costs, with professional customer service and innovation in technology.
- How is quality ensured?
- All processes strictly adhere to ISO9001:2008 procedures with strict quality control from producing to delivery and strong technology support.
- If you cannot find the product you need on your website, what should I do?
- You can send pictures, photos, or drawings via email for us to check, or send samples by DHL/TNT for us to develop a new model especially for you.
- Can you strictly follow the tolerance on the drawing and meet high precision?
- Yes, we can provide high precision parts and make the parts exactly as your drawing.
- How should I order and make payment?
- By T/T; for samples 100% with the order; for production, 30% paid for deposit before production arrangement, and the balance before shipment.
- What is your delivery time?
- Standard parts take 7-15 days, while non-standard parts take 15-25 days.
- How to custom-made (OEM/ODM)?
- Send us a new product drawing or sample, and we can custom-make the hardware as required while providing professional advice to maximize performance.
- Which mode of transport would be better?
- In general, sea freight is recommended as production is heavy, but we respect your views on other transportation modes as well.
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