Ss316 Hex Socket Flat Head Cap Screw DIN7991
1> Description: Ss316 Hex Socket Flat Head Cap Screw DIN7991
2> Material: Stainless Steel 316
3> Surface: Passivated
4> Size: M6 to M24, or 1/4" to 1"
5> Length: Up to 500mm
6> Mechanical Properties: A4-50/70
7> Packing: Bulk packing and box packing
We are a professional manufacturer of bolts, including Socket Cap Screws, Hex Head Screws, Carriage Bolts, Square Head Bolts, and more. Our products adhere to standards such as DIN, GB, ANSI, ISO, and JIS. We use imported equipment, materials, and matrices to ensure the highest quality. In addition, we can produce non-standard parts tailored to your specifications.
Please feel free to contact us if you're interested in our products. With over 40 years of experience in fastener manufacturing and an ISO 9001 certification, we guarantee top-quality products and exceptional service.
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 machine parts for the automotive and other industries. The group's headquarters is Dragon Iron Enterprise in A Lien, Taiwan. Lockey Industrial Co., Ltd., set up in 2003 in Dongguan City, serves as the foreign sales department of the group. Our plant is located in Jingjiang City, allowing us to easily export our products.
What does Lockey do?
As a fastener manufacturer, we mainly produce:
1. Bolts, studs, and thread rods
2. Hex nuts, nylon nuts, flange locknuts
3. Tapping screws, drilling screws, wood screws, machine screws, socket cap screws
4. Washers (plain, spring, tooth)
5. Structural applications like ASTM A325/A490, ASTM F1852/F2280, DIN6914/5/6, DIN7990
We also produce special fasteners, hardware parts, forging, and machine parts for the automotive industry. We supply parts for Toyota, Honda, and others. 70% of our products are exported.
Why choose Lockey?
Lockey never stops innovating. Innovation is the driving force behind our development. We focus on both technological and conceptual innovation. We have a team of skilled professionals who are good at management and cooperation. When you contact us, you will get excellent results.
We are not just a supplier but a partner. We don’t only sell; we share. We share the latest information on fasteners, price trends, and even profit. We care about your success and the quality of the products you use.
How does Lockey ensure quality?
With over 40 years of experience and an ISO 9001 certificate, we have a strict quality assurance system. 80% of our staff are skilled and have worked with us for more than five years. Employees undergo skill training regularly to prevent and handle any issues effectively.
Do you produce non-standard items?
Yes, we do. Send your specification drawings to our sales representative, and you’ll receive a quotation.
Do you have a published price list?
No, we don't. Market conditions are always changing, making it difficult to maintain standard pricing. Our sales team is flexible and offers the best possible price when needed.
Do you offer discounts?
Yes, we offer discounts based on order quantity. However, we believe our sales team provides the best price available. You may get a discount, but not a huge one. Feel free to explore.
Do you provide samples?
Of course! Stored samples are free. However, we don’t have a budget for express shipping.
What’s the delivery time?
It depends on your order quantity. Standard items take 20–40 days, while non-standard ones take 35–60 days. Contact your sales representative for an accurate shipment date.
What is the payment term?
T/T and L/C are preferred. Western Union is acceptable for small payments, such as sample shipping fees.
| Technical Delivery Conditions | |||||
| Material | Steel | Stainless steel | Non-ferrous Metal | ||
| General requirements | As specified in DIN 267 part 1 | ||||
| Thread | Tolerance | 6g | |||
| Standard | DIN13 Part 12 & 15 | ||||
| Mechanical properties | Property class | 8.8 | ≤M20 | A2-70 | CuZn |
| A4-70 | Copper | ||||
| >M20 | A2-50 | Zinc Alloy | |||
| A4-50 | ........ | ||||
| Other property classes or material subject to agreement | |||||
| Standard | ISO 898 Part 1 | DIN267 Part 11 | DIN267 Part 18 | ||
| Limit deviations geometrical tolerance | Product grade | A | |||
| Standard | ISO 4759 Part 1 | ||||
| Surface finish | Blackened | Bright | Bright | ||
| DIN267 Part 2 shall apply with regard to surface roughness | |||||
| DIN267 Part 19 shall apply with regard to permissible surface discontinuities | |||||
| DIN267 Part 9 shall apply with regard to electroplating | |||||
| If a different kind of electroplating or a different kind of surface protection is desired, this should be agreed upon at the time of ordering | |||||
| Acceptance inspection | DIN267 Part 5 shall apply with regard to acceptance inspection | ||||
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