Premium Black Double-Headed Self-Tapping Screws
High-quality black double-headed screws with self-tapping machine
thread designed for versatile industrial applications.
Product Specifications
Material Options
Stainless Steel (SUS201, SS303, SS304, SS316, SS410, SS430), Carbon
Steel (C1018, C1022, 10B21), Alloy Steel (40Cr, SCM435), Brass,
Aluminum, Copper. Custom materials available.
Head Styles
Pan, Truss, Flat, Hexagonal, Round, HEX, Cheese, Binding, Oval
Drive Styles
Phillips, Torx, Inner Hexagonal, Hexagonal, Plum, Cross, Slotted,
Star
Thread Types
Self-tapping, Machine teeth (Coarse teeth, Fine teeth), Custom
thread specifications
Standards
DIN, ISO, ANSI, BSW, JIS, GOST, GB and other international
standards
Finishing Options
Plated: Zinc, Zinc nickel alloy, Chrome, Silver, Gold, Brass, Tin.
Coating: Dacromet, MAGni, Geomet, Electrophoresis, Baking paint.
Passivation; Oxide: Black Oxide, Anodic oxidation
Performance Grades
Carbon Steel: 4.8~12.9 grade; Stainless Steel: A2-70, A4-70, A4-80,
A5-80; Hardening of carburized surfaces: HV400-HV550. Custom
specifications available.
Customization & Quality
Anticorrosion Protection
Customizable salt spray testing: 12H, 24H, 48H, 96H, 196H, 240H,
480H, 720H, 840H
Size Range
Diameter: M0.6mm, M0.8mm ~ M36mm | Length: 1mm~600mm
Environmental Compliance
RoHS, SCHV, MSDS, IMDS certified
Quality Testing
Performance test reports, Salt spray test reports, Dimensional
inspection reports, PPAP, PSW documentation
Manufacturer Profile
Lock Technology (Shenzhen) Co., Ltd. specializes in fastener and precision machined parts manufacturing
since 2007. With an overseas sales company established in 2013, we
provide comprehensive solutions for global customers.
Applications
Automotive, electronics, electrical equipment, household
appliances, communication equipment, consumer electronics, optical
equipment, medical equipment and other industrial fields.
Manufacturing Capabilities
40,000 square meter facility in Shenzhen with over 1,000 production
equipment units including cold heading equipment, thread rubbing
equipment, CAM lathes, CNC lathes, CNC milling machines, and 300+
inspection equipment types. Annual production value exceeds $10
million.
Global Reach
Products exported to Europe, America, Africa, and Southeast Asia
with excellent customer feedback for quality and service.
Certifications & Quality Standards
ISO9001, IATF16949, ISO14001, ISO45001 and other system
certifications ensuring consistent quality and environmental
compliance.
Production & Delivery
| Quantity (pieces) | Lead Time (days) |
|---|
| 1 - 10,000 | 10 |
| 10,001 - 50,000 | 15 |
| 50,001 - 100,000 | 20 |
| > 100,000 | To be negotiated |
Packaging Options
Independent carton, self-sealing bag, blister, vacuum packaging,
pallet, and custom packaging solutions.
Shipping Methods
FedEx, DHL, UPS, or customer-specified transportation methods.
Global Partnerships
We have provided customized services to over 300 customers
worldwide. Our products are sold to more than 20 countries and
regions including Europe, North America, South America, and
Southeast Asia.
Frequently Asked Questions
Q: Can you provide customized services?
A: Yes, we accept OEM/ODM services with 20+ years experience in
custom non-standard screws. We provide free product drawings based
on your requirements if needed.
Q: Can you supply samples?
A: Yes, we provide free samples when molds exist. For new tooling,
mold and shipping costs are customer responsibility.
Q: How do you ensure quality?
A: Professional QC department with strict adherence to ISO9001,
IATF16949, ISO14001, SGS, RoHS, PPAP, MSDS standards. We provide
drawings and samples for confirmation.
Q: What is the minimum order quantity?
A: High-value products: 1,000-10,000 pcs. Low-value products:
20,000 pcs. Trial orders accepted before mass production.
Q: What transportation options are available?
A: Sea delivery, air delivery, or door-to-door express services
based on customer preference.
Q: How to place orders and make payments?
A: Send purchase order or confirmation via email/TradeManager. We
provide Proforma Invoice with bank details. Payment options include
PayPal and L/C.
Samples & Trial Orders: Free samples available with 5-7 day lead time. Mass production:
15-25 days (negotiable).
M4 Stainless Steel Hex Bolt A2-50 Grade 720H Salt Spray Test
