Stainless Steel A4-70 Hex Nylon Nut per ISO 7040
1. Description: Stainless Steel A4-70 Hex Nylon Nut in accordance with ISO 7040
2. Material: Stainless Steel 316
3. Surface Finish: Passivated
4. Size Range: M5 (3/16") to M24 (1")
5. Mechanical Properties: A4-70
6. Packing: Bulk packing, box packing, and palletized as per customer requirements
We produce a wide range of nuts including Hex Nut, Hex Flange Nut, Kep Nut, Hex Nylon Nut, Hex Flange Nylon Nut, Square Nut, Coupling Nut, Hex Jam Nut, Hex Heavy Nut, Channel Nut (Sliding Nut), and more.
Lock Nuts provide a secure hold and reduce slippage. Stainless Steel fasteners are ideal for applications where strength and cost-effectiveness are key considerations. The hexagonal drive system ensures easy installation. Coarse threads are recommended for brittle materials, allowing for quicker assembly and disassembly while ensuring a long-lasting grip for any project.
If you are interested in our products, please feel free to contact us. We will provide the best price once we receive your inquiry.
**Q&A**
**Who is Lockey?**
Lockey is a fastener manufacturer established in 1973. Dragon Iron Group focuses on the production and sales of fasteners, hardware parts, forging, and machined components for the automotive and other industries. The company’s headquarters are located in A Lien, Taiwan. Lockey Industrial Co., Ltd., was set up in 2003 in Dongguan City as the foreign sales department of the group. Our plant is based in Jingjiang City, making it easy for us to export our products worldwide.
**What do Lockey produce?**
As a fastener manufacturer, we mainly produce, but are not limited to:
1. Bolts, studs, and threaded rods
2. Hex nuts, nylon nuts, flange locknuts
3. Tapping screws, drilling screws, wood screws, machine screws, socket cap screws
4. Plain washers, spring washers, tooth washers
5. Structural fasteners, ASTM A325/A490, ASTM F1852/F2280, DIN 6914/5/6, DIN 7990
In addition, we also manufacture special fasteners, hardware parts, forging, and machined parts for the automotive industry. We supply components for Toyota, Honda, and others. 70% of our products are exported globally.
**Why choose Lockey?**
Lockey never stops innovating. Innovation is the driving force behind our continuous development. Through technological and conceptual innovation, we keep growing and moving forward. We have gathered a team of professionals skilled in management and cooperation. Contacting them will ensure you get satisfactory results.
We are proud that you have chosen Lockey as your supplier, but we are more than just a supplier—we are your partner. We don’t just sell; we share. Share new information about fasteners, price trends, and even profits. We are friends who care not only about our sales but also about yours and the quality of your experience.
**How does Lockey ensure quality?**
With over 40 years of experience in fastener manufacturing and an ISO 9001 certification, we continuously address challenges and solve problems. We have implemented a quality assurance system aligned with ISO 9001, based on factors that may affect product quality. 80% of our staff are skilled workers with over five years of experience. Employees attend skill training sessions both on and off the job to ensure they can prevent and handle issues effectively.
**Does Lockey produce non-standard items?**
Yes, we do. Please send your specification drawings to our sales representative, and we will provide you with a quotation.
**Do you have a published price list?**
No, we do not. Market conditions fluctuate constantly, making it difficult to maintain a standard pricing structure. Our sales team has the flexibility to quote prices based on your specific needs, ensuring you receive the best possible price when you need it.
**Do you offer discounts?**
Of course, we can offer discounts based on large quantities. However, as mentioned earlier, we believe our sales team provides the best possible price. While you may receive a small discount, we encourage you to explore further.
**Do you provide samples?**
Yes, we do. Stored samples are completely free. However, we do not have a budget for express shipping.
**What is the delivery time?**
It depends on your order quantity. Standard items take approximately 20–40 days, while non-standard items take around 35–60 days. Please consult with your sales representative for an accurate shipment date.
**What are the payment terms?**
T/T and L/C are preferred. Western Union is also acceptable for low-value payments such as sample express fees.
| Technical Delivery Conditions | ||
| Material | Steel | |
| General Requirements | As specified in DIN 267 Part 1 & 15 | |
| Thread | Tolerance | 6H |
| Standard | DIN 13 Part 12 & 15 | |
| Mechanical Properties | Property Class | ≤M39: 5, 6, 8 or 10; >39: By agreement |
| Standard | ISO 267 Part 4 | |
| Limit Deviations Geometrical Tolerance | Product Grade | A for product up to size M24 and L ≤ 10d or 150mm; B for product exceeding size M24 or L > 10d or 150mm |
| Standard | ISO 4759 Part 1 | |
| Surface Finish | As processed | |
| DIN 267 Part 2 shall apply regarding surface roughness | ||
| DIN 267 Part 20 shall apply regarding permissible surface discontinuities | ||
| DIN 267 Part 21 shall apply regarding the widening test | ||
| DIN 267 Part 9 shall apply regarding electroplating | ||
| DIN 267 Part 10 shall apply regarding hot dip galvanizing | ||
| Acceptance Inspection | DIN 267 Part 5 shall apply regarding acceptance inspection | |
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