Standard & made-to-drawing parts
Checked before shipping
Air, sea & express delivery

Screws › Countersunk & Flat-Head Machine Screws

Custom 8.8 Grade Black Phosphate Knurled Neck Weld Screw with Flat/Round/ Countersunk Head for High-Strength Applications

Updated 2026-11-04 · Markdown version

Model no. 824

US$0.05285,000–9,999 pieces

US$0.039610,000–99,999 pieces

US$0.0264100,000+ pieces

MOQ 5,000 pieces · Final price confirmed in your quote

Head Style: Round
Standard: DIN, GB, ANSI, JIS
Grade: 8.8
Custom: Yes
Drive: Hand Twist
Screw Diameter: 8mm
Surface: Galvanized
Screw Length: 3mm-110mm Available

Get a quote WhatsApp

Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order.

Specifications

Model NO.	824
Groove	Special Shape
Connection	Hinged Bolts
Head Style	Round
Standard	DIN, GB, ANSI, JIS
Grade	8.8
Custom	Yes
Drive	Hand Twist
Screw Diameter	8mm
Surface	Galvanized
Screw Length	3mm-110mm Available
After-Sales Service	Warranty
Warranty Period	Three Years
Authentication	ISO9001
Transport Package	General Export Package/Require to Customer
Specification	M2-M12
Origin	China
HS Code	7318150000
Production Capacity	800 Tons/Month
Package Size	27.00cm * 20.00cm * 16.00cm
Package Gross Weight	20.000kg
Customization	Available
Material	Carbon Steel
Type	Round Head
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Specification	Description	Details
Type	Weld Screw	A screw specifically designed for welding applications, featuring a head suitable for welding processes.
Material	Carbon Steel, Stainless Steel, Brass, etc.	The material composition that affects the screw's strength, corrosion resistance, and environmental compatibility.
Diameter (d)	Ranges from small to large	The nominal diameter of the screw thread, available in various sizes to suit different applications.
Length (L)	Varies depending on application requirements	The overall length of the screw, accommodating different assembly depths and requirements.
Thread Type	None, External, or Internal	The presence and type of thread, which can be tailored for specific applications.
Head Type	Flat, Oval, Pan, etc.	The shape of the screw head, which influences the way it is installed and the torque applied.
Drive Type	Slotted, Phillips, Hex Socket, etc.	The type of drive mechanism compatible with the screw head for installation.
Corrosion Resistance	High, Moderate, Low	The screw's ability to withstand corrosion, a critical factor for use in harsh or exposed environments.
Tensile Strength	Rated in MPa	The maximum tensile stress the screw can endure before failure, essential for high-load applications.
Shear Strength	Rated in MPa	The maximum shear stress the screw can handle before breaking, important for lateral force resistance.
Application	Automotive, Machinery, Electronics, Construction, etc.	The various industries and applications where the screw is commonly utilized.
Temperature Range	Varies by material, e.g., -60°C to 300°C for stainless steel	The safe operating temperature range of the screw without loss of strength or corrosion resistance.
Finish	Zinc Plated, Galvanized, Black Oxide, etc.	Surface treatments to enhance the screw's corrosion protection and improve aesthetics.
Customizability	Available in custom sizes, materials, and finishes	The option to produce screws with specific dimensions, materials, or finishes for specialized needs.
Standards	Adheres to international standards such as ISO, ASTM, GB, JIS, DIN	The manufacturing and testing standards ensuring quality, reliability, and consistency.

Transportation Method	Destination Regions	Estimated Timeframe	Packaging Options
Via Ocean shipping	North America	About 40 working days	Boxes, cartons or plastic bags, or as per customer needs.
	South America	About 40 working days
	Eastern Europe	30-40 working days
	Southeast Asia	20-30 working days
	Africa	35-45 working days
	India, Pakistan	About 40 working days
	Korea, Japan	About 40 working days
Air transport	Other places	Around 1-3 business days	Boxes, cartons or plastic bags, or as per customer needs.

Description

Custom 8.8 Grade Black Phosphate Knurled Neck Weld Screw with Flat/Round/ Countersunk Head for High-Strength Applications is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Round Head
Standard: DIN, GB, ANSI, JIS
Material: Carbon Steel
Grade: 8.8
Head Style: Round
Groove: Special Shape
Drive: Hand Twist
Connection: Hinged Bolts

Available configurations include head style, standard, grade, custom and drive. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 5,000 pieces at US$0.0264 – 0.0528 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you.

Frequently asked questions

What is the minimum order quantity (MOQ) for Custom 8.8 Grade Black Phosphate Knurled Neck Weld Screw with Flat/Round/ Countersunk Head for High-Strength Applications?

The listed minimum order is 5,000 pieces, at US$0.0264 – 0.0528 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

How does the price change with quantity?

Volume pricing: US$0.0528 for 5,000–9,999 pieces; US$0.0396 for 10,000–99,999 pieces; US$0.0264 for 100,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of Custom 8.8 Grade Black Phosphate Knurled Neck Weld Screw with Flat/Round/ Countersunk Head for High-Strength Applications?

Type: Round Head; Standard: DIN, GB, ANSI, JIS; Material: Carbon Steel; Grade: 8.8; Head Style: Round; Groove: Special Shape. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include head style, standard, grade, custom and drive. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing.

What is the lead time and how is it shipped?

Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment.

Which other countersunk & flat-head machine screws are available?

The Countersunk & Flat-Head Machine Screws category lists 2,424 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/

How we work

Specified, checked and shipped by Engineering Hardware & Fasteners

Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing.

DIN, ISO, ASTM, ANSI, JIS and GB standard parts
Non-standard parts made to your drawing
Dimensions, thread gauges and plating checked before packing
Export cartons and pallets, consolidated mixed orders
Samples available for approval before mass production

More about us → · Request a sample or custom quote →

Request a quote for this product

US$0.0264 – 0.0528MOQ 5,000 piecesGet a quote WA