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1. Description: High-strength heavy hex bolts made from alloy steel.
2. Material: Alloy Steel.
3. Surface Finish: Plain, Zinc, HDG, etc.
4. Size: M16 - M42, 5/8" - 2"
5. Length: Up to 1000mm
Our business line includes high strength bolts such as:
- A325 Tension Control Bolts (T.C Bolts)
- A449 Tension Control Bolts (T.C Bolts)
- A490 Tension Control Bolts (T.C Bolts)
- DIN6914 series
For metric threads, we can meet classes 8.8, 10.9, and 12.9.
We are excited to hear from you if you're interested in our products. Please feel free to contact us for more details or a quotation.
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
5.6, 8.8, 10.9
≤M20
A2-70
Subject to agreement
A4-70
>M20
A2-50
A4-50
C3,C4
Standard
ISO 898 Part 1
DIN267 Part 11
DIN267 Part 18
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 Property class 8.8 and above: Blackened
Bright
Bright
DIN267 Part 2 shall apply regarding surface roughness
DIN267 Part 19 shall apply regarding permissible surface discontinuities
DIN267 Part 9 shall apply regarding electroplating
DIN267 Part 10 shall apply regarding hot dip galvanizing
Acceptance inspection
DIN267 Part 5 shall apply regarding acceptance inspection
Q&A
Who is Lockey?
Lockey Industrial Co., Ltd. is a fastener manufacturer established in 1973. It is part of the Dragon Iron Group, which specializes in manufacturing and selling fasteners, hardware parts, forgings, and machined parts for the automotive and other industries. The group's headquarters are located in A Lien, Taiwan. Lockey 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. For more information, visit http://www.lockey-dg.com/eng_001.htm.
What do Lockey produce?
As a fastener manufacturer, we mainly produce bolts, studs, thread rods, hex nuts, nylon nuts, flange locknuts, tapping screws, drilling screws, wood screws, machine screws, socket cap screws, plain washers, spring washers, tooth washers, structural applications (such as ASTM A325/A490, ASTM F1852/F2280, DIN6914/5/6, DIN7990), and special fasteners, hardware parts, forging, and machine parts for the automotive industry. We supply parts for Toyota and Honda. Approximately 70% of our products are exported.
Why Lockey?
Lockey is driven by innovation. We believe that continuous innovation is essential for growth. With over 40 years of experience and an ISO9001 certification, we focus on quality, reliability, and customer satisfaction. We are not just a supplier but a long-term partner, committed to sharing knowledge, trends, and profits with our clients.
How does Lockey ensure quality?
With over 40 years of experience and an ISO9001-certified quality system, we have developed strict quality control measures. Over 80% of our staff are skilled workers with more than five years of experience. All employees undergo regular training to ensure consistent quality and problem-solving capabilities.
Do you produce non-standard items?
Yes, we can produce custom parts. If you provide your specifications or drawings, our sales team will prepare a quotation for you.
Do you have a published price list?
No, we don't. Market conditions change frequently, so we offer flexible pricing tailored to each order. Our sales representatives will provide the best possible price based on your specific needs.
Do you offer discounts?
Yes, we offer discounts for large orders. However, we believe our current pricing already reflects the best value available. Feel free to reach out for more details.
Do you provide samples?
Yes, we offer free samples if they are in stock. However, we do not cover express shipping costs.
Delivery time?
It depends on the quantity. Standard orders take about 20–40 days, while non-standard items may take 35–60 days. Contact our sales representative for a precise delivery date.
Payment terms?
We prefer T/T (Telegraphic Transfer) and L/C (Letter of Credit). Western Union is also acceptable for small payments like sample shipping fees.
Model NO.: LKOP
Application: Construction and Industrial Use
Finish: Plain, Zinc Plated, Hot-Dipped Galvanized (HDG), etc.
Market: Global
Sample: Free (Available in Stock)
Optional Material: Stainless Steel, Carbon Steel, Alloy Steel, Brass
Optional Finish: Passivated, Zinc Plated, HDG, etc.
Optional Size: M16 to M42, 5/8" to 2"
Certificate: ISO9001, ISO/TS16949
Trademark: LK
Transport Package: Bulk Packing, Small Box Packing
Specification: DIN, ANSI, ISO, and Custom Options
Origin: China
HS Code: 7318
Alloy Steel High Strength Heavy Hex Bolt