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Black M8 M12 Carbon steel Flat head Philip sclotted tapping screws Class4. 8 Grade4.8

Name: Black M8 M12 Carbon steel Flat head Philip sclotted tapping screws Class4. 8 Grade4.8
Brand: Hunan Jia Shan Hardware Tech Co., Ltd.
SKU: DIN, ASEM, ISO
Price: 0.20 USD
Availability: InStock

Product Details

Place of Origin: China

Brand Name: JIA SHAN

Certification: ISO

Model Number: DIN, ASEM, ISO

Payment & Shipping Terms

Minimum Order Quantity: 100

Price: USD0.2/pcs-USD1/pcs

Delivery Time: 1-5 weekds

Payment Terms: T/T, Western Union

Supply Ability: Batch order abailable

Get Best Price

Product Details

Product Description

Highlight:

Usage:	Fastening	Size:	Various Sizes Available
Style:	Self Tapping Screws	Head Style:	Self Tapping Screws
Strength:	High	Finish:	Black
Manufacturer:	JIA SHAN Hardward Company	Length:	As Customisation
Package:	Small Packing+Carton Packing+Pallet	Standard:	DIN
Package Quantity:	100 Pieces	Shape:	Self Tapping Screws
Measurement System:	INCH, Metric	Port:	Shenzhen
Quality:	Inspection Before Shipment	Color:	As Customisation
Material:	Carbon Steel

Usage:	Fastening
Size:	Various Sizes Available
Style:	Self Tapping Screws
Head Style:	Self Tapping Screws
Strength:	High
Finish:	Black
Manufacturer:	JIA SHAN Hardward Company
Length:	As Customisation
Package:	Small Packing+Carton Packing+Pallet
Standard:	DIN
Package Quantity:	100 Pieces
Shape:	Self Tapping Screws
Measurement System:	INCH, Metric
Port:	Shenzhen
Quality:	Inspection Before Shipment
Color:	As Customisation
Material:	Carbon Steel

Black M8 M12 Carbon steel Flat head Philip sclotted tapping screws Class4. 8 Grade4.8

Black M8 M12 Carbon Steel Flat Head Phillips Slotted Tapping Screws Class 4.8 Grade 4.8

Product Specifications

Attribute	Value
Usage	Fastening
Size	Various sizes available
Style	Self Tapping Screws
Strength	High
Finish	Black
Manufacturer	JIA SHAN Hardware Company
Length	Customizable
Package	Small Packing + Carton Packing + Pallet
Standard	DIN
Package Quantity	100 pieces
Measurement System	INCH, Metric
Port	Shenzhen
Quality	Inspection before shipment
Color	Customizable
Material	Carbon steel

Product Overview

Types of Self-Tapping Screws

Ordinary self-tapping screws: Feature 'self-tapping thread' (wide thread), mostly surface plated.
Self-cutting tapping screws: Include cross recessed pan head, countersunk head, raised countersunk head, and hexagonal head variants.
Self-extruding tapping screws: Typically use machine thread with triangular cross-section for high-speed assembly.
Self-drilling tapping screws: Designed with self-tapping or machine thread for direct drilling applications.
Metal drive screws: Feature multi-head special thread primarily following US standards.
Wallboard tapping screws: Include trumpet head with cross groove and 60° tooth angle, often phosphated.
Fibreboard nails: Available in various head styles with Z-type cross slot, typically plated.
Combination self-tapping screws: Combine standard screws with washers for enhanced functionality.
Specialty variants: Include double lead, different pitch threads, sealed threads, and composite groove designs.

Key Features

Manufactured from carburized steel (99%), with stainless steel or non-ferrous options available
Heat-treated for optimal performance - carbon steel screws are carburized, stainless steel screws are solution-hardened
High surface hardness with tough core ("soft outside steel") for superior fastening performance
Surface protection through plating or phosphate treatment (for wallboard screws)
Produced using high-speed cold heading and thread rolling machines for consistent quality

Blackening Treatment Benefits

Enhanced rust prevention: Iron tetraoxide film inhibits red rust formation, with optional oil treatment for added protection
Improved durability: Chemically bonded surface treatment resists flaking compared to plating or painting
Better tool compatibility: Maintained surface oil improves sliding properties for tools and machine parts

Material Composition

No.	C%	Cr%	Ni%	Mo%
304	0.07	17.5-19.5	8.0-10.5	/
316	0.08	16.0-18.0	10.0-14.0	2.00-3.00
301	0.15	16.0-18.1	6-8	/
310	0.08	24-26	19-22	/
304L	0.03	18-20	8-12	/
316L	0.03	16-18	10-14	2-3
321	0.08	17-19	9-12	/

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