Hex Flange Head High-Low Thread Self-Tapping Screws

Product Introduction

Hex Flange Head High-Low Thread Self-Tapping Screws feature an indented, cupped flange head, high-low thread design, and T-17 point for efficient tapping, stable fastening, and reliable connections in metal and construction applications.

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Core Advantages Application Scenarios OEM / ODM Services Why Choose Us FAQ Technical Parameters Inquiry Form

Core Advantages

1. High-Low Thread for Efficient Fastening

The high-low thread structure makes this High-Low Thread Screw suitable for applications requiring efficient thread engagement and stable fastening. The high thread outer diameter ranges from 4.60–5.60 mm, while the low thread outer diameter ranges from 3.60–4.60 mm.

2. Reliable Torque Performance

The hexagonal head provides secure tool engagement during installation. Depending on the specification, the Hex Flange Head Screw delivers a specified torque of 4.71–10 N·m, supporting stable tightening for industrial and construction fastening.

3. Stable Flange Head Design

The Hex Flange Head Self-Tapping Screw features a flange diameter of 12.80–15.00 mm and a flange recess depth of 0.90–1.40 mm. The wider flange provides increased bearing contact and helps maintain a stable connection after installation.

4. Durable Mechanical Performance

Made from SAE C1022A steel, these Self-Tapping Screws have a surface hardness of ≥550 HV0.3 and a core hardness of 270–450 HV0.3. The specified case depth is 0.100–0.230 mm, supporting consistent thread performance during repeated production use.

Application Scenarios

Metal-to-Metal Fastening
Sheet Metal Assembly
Steel Structures
Metal Panels
HVAC Systems
Construction Projects
Industrial Equipment
Steel Framing
Electrical Enclosures
Wholesale Distribution

OEM / ODM Services

We manufacture High-Low Thread Self-Tapping Screws in our own factory and provide OEM/ODM services for distributors, wholesalers, contractors, and industrial fastener buyers.

Available customization options include:

• Custom head height
• Custom raw material wire diameter
• Custom washer thickness

Why Choose Us

1. Integrated R&D, Production, Sales and Service

Founded in 2011, we are a comprehensive hardware enterprise integrating R&D, production, sales and service. With in-house manufacturing and direct factory supply, we can control quality, cost, and lead time more effectively than trading companies.

2. Certified Quality Management System

We hold ISO 9001:2015 certification for our quality management system, covering the production of fasteners. This ensures consistent quality control and reliable production standards for bulk orders.

3. Wide Product Portfolio and Application Coverage

Our products cover construction hardware, furniture hardware, automotive hardware accessories, and precision mechanical parts, widely used in residential construction, commercial facilities, transportation vehicles, electronic equipment, and other industries.

FAQ

Q1: What is the MOQ for Hex Flange Head High-Low Thread Self-Tapping Screws?

The standard MOQ is 100,000 pcs for bulk orders.

Q2: What payment terms do you accept?

We accept cash on delivery according to the agreed order terms.

Q3: Do you provide OEM and ODM services?

Yes. We support customization of head height, raw material wire diameter, and washer thickness for OEM and ODM orders.

Q4: What is the production lead time for Hex Flange Head Self-Tapping Screws?

The standard production lead time is approximately 45 days after order confirmation.

Description	Indented Cupped Flange Head Hi-Low Thread T-17 Point
ITEM	DK (Flange Diameter)	S (Across Flats)	B (Flange Flat)	H (Head Height)	K (Hex Height)	U(min) (Flange Height)	G (Flange Recess Depth)	Da (Flange Recess Inner Dia.)	D (High Thread Outer Dia.)	D1 (Low Thread Outer Dia.)	d (Thread Root Dia.)	S(±10%) (Lead)	Torque(N.M)
10#-16	12.80-13.20	7.75-7.92	10.50-10.70	4.80-5.10	2.70-3.00	2.1	0.90-1.40	9.20-9.70	4.60-4.90	3.60-3.90	2.80-3.10	3.2	4.71
12#-15	14.00-15.00	7.75-7.92	10.50-10.70	6.10-6.40	3.60-3.90	2.5	0.90-1.40	11.70-12.30	5.30-5.60	4.30-4.60	3.80-4.10	3.4	10

Nominal Length	Tolerance	Note： 0-51：Full Thread 52-65：Thread Length = 42 ±2 66-102：Thread Length = 50 ±2 103-：Thread Length = 72 ±2
L ≤ 25	±0.8
25 < L ≤ 50	±1.25
50 < L ≤ 75	±1.5
L > 75	±2

Mechanical Properties
Item	Specification
Material	SAE C 1022A STEEL
Surface Hardness	≥550 HV0.3
Core Hardness	270-450 HV0.3
Case Depth	4.8- 5.5-- 0.100- 0.230 mm 6.3- 0.150- 0.280 mm
MOQ	100,000 pcs
Lead Time	45 days