Stainless Steel A4-70 Hex Nylon Nut per ISO 7040
1. Description: Stainless Steel A4-70 Hex Nylon Nut as per 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 request
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 value are key considerations. The drive system is a hexagonal head, making them easy to install. Coarse threads are better suited for brittle materials and allow for quicker assembly and disassembly than fine threads, ensuring a long-lasting hold for any project.
If you are interested in our products, please don’t hesitate to contact us. We will provide the best price as soon as we receive your inquiry.
**Q&A**
**Who is Lockey?**
Lockey is a fastener manufacturer founded in 1973. Dragon Iron Group specializes in the production and sales of fasteners, hardware parts, forging, and machined components for the automotive and other industries. The group's headquarters is located in A Lien, Taiwan. Lockey Industrial Co., Ltd. was established in 2003 in Dongguan City as the foreign sales department of the group, with its plant in Jingjiang City. This setup allows for efficient export of our products.
**What do Lockey produce?**
As a fastener manufacturer, we mainly produce:
1. Bolts, studs, and threaded rods
2. Hex nuts, nylon nuts, and flange locknuts
3. Tapping screws, drilling screws, wood screws, machine screws, and socket cap screws
4. Plain washers, spring washers, and tooth washers
5. Structural applications such as ASTM A325/A490, ASTM F1852/F2280, DIN 6914/5/6, DIN 7990, etc.
In addition, we also manufacture special fasteners, hardware parts, forgings, and machined components for the automotive industry, including parts for Toyota and Honda. 70% of our products are exported.
**Why choose Lockey?**
Lockey never stops innovating. Innovation is the driving force behind our development, and we focus on both technological and conceptual innovation. We have gathered a team of professionals who excel in management and cooperation. You will get satisfied results by working with them.
We are not just a supplier—we are a partner. We don’t only sell; we share. We share updates on fasteners, price trends, and even profit. We are friends, and we care about your sales and the quality of your usage.
**How does Lockey ensure quality?**
With over 40 years of experience in fastener manufacturing and an ISO 9001 certificate, we have developed a robust quality assurance system. Our criteria are based on factors that may affect quality. 80% of our staff are skilled workers with over five years of experience. Employees undergo skill training for weeks to ensure they can prevent and handle issues effectively.
**Do Lockey produce non-standard items?**
Yes, we do. Send your specification drawings to our sales representative, and you will receive a quotation.
**Does Lockey have a published price list?**
No, we do not. Market conditions fluctuate, making it difficult to maintain standard pricing. Our sales team is flexible when providing quotes, ensuring you get the best possible price at the time of your request.
**Does Lockey offer discounts?**
Of course, we can offer discounts based on large quantities. However, we believe our sales representatives already provide the best price available. While you may receive a small discount, it’s always worth exploring further.
**Does Lockey provide samples?**
Yes, we do. Stored samples are free of charge. However, we do not have a budget for express shipping.
**What is the delivery time?**
It depends on the order quantity. Standard items take approximately 20–40 days, while non-standard items take 35–60 days. Please consult with your sales representative for an accurate shipment date.
**What is the payment term?**
T/T and L/C are preferred. Western Union is also acceptable for low-value payments, such as sample shipping fees.
| Technical Delivery Conditions | ||
| Material | Steel | |
| General requirements | As specified in DIN 267 part 1 & 15 | |
| Thread | Tolerance | 6H |
| Standard | DIN13 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 | |
| DIN267 Part 2 shall apply with regard to surface roughness | ||
| DIN267 Part 20 shall apply with regard to permissible surface discontinuities | ||
| DIN267 Part 21 shall apply with regard to the widening test | ||
| DIN267 Part 9 shall apply with regard to electroplating | ||
| DIN267 Part 10 shall apply with regard to hot dip galvanizing | ||
| Acceptance inspection | DIN267 Part 5 shall apply with regard to acceptance inspection | |
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