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

Bolts › Countersunk, Plow & Elevator Bolts

304 Stainless Steel GB820 Countersunk Head Phillips Screws Bolts, Semi-Flat Head Screws M2 M. 5 M3 M4 M5 M6 M8 M10

Updated 2026-11-03 · Markdown version

Model no. GB820

US$0.1110,000–49,999 pieces

US$0.0650,001+ pieces

MOQ 10,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Round
Standard: GB
Grade: 4.8
Surface Treatment: White Zinc
Length: 12mm
Package Size: 30.00cm * 26.00cm * 18.00cm
The material is primarily divided into two types: SUS304 stainless steel countersunk head machine screws (strength class A2-70)

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

Material	Stainless Steel
Type	Countersunk Head
Groove	Cross
Model NO.	GB820
Connection	Common Bolt
Head Style	Round
Standard	GB
Grade	4.8
Surface Treatment	White Zinc
Length	12mm
Transport Package	Tray
Specification	M5
Origin	Guangxi, China.
Production Capacity	50000pieces/Year
Package Size	30.00cm * 26.00cm * 18.00cm
Package Gross Weight	25.000kg
The material is primarily divided into two types	SUS304 stainless steel countersunk head machine screws (strength class A2-70)
Typical Applications	Machinery enclosures and precision instrument assembly
Alternative Standard	DIN 965 (Slotted and cross recessed countersunk head screws), ISO 2009 (Countersunk head screws)
Approximate Standard	GB/T 2673 (Cross recessed countersunk flat head screws), ASME B18.6.3
Optional Materials	Stainless steel SUS304, SUS316, grades A2-70, A4-70, A4-80, etc.
Flush Surface Finish	Countersunk head design ensures screw head is level with or below the material surface.
Corrosion Resistance	Stainless steel construction provides durability in humid, chemical, or outdoor environments.
High Strength and Precision	Suitable for precision assemblies requiring reliable fastening and dimensional accuracy.
Smooth Aesthetics	Eliminates protruding screw heads for improved safety, cleanliness, and visual appeal.
Wide Drive Compatibility	Available with various drive types including Phillips, slotted, hex socket, or combination drives.
How to Use	Drill or countersink a tapered hole matching the screw head angle (typically 82° or 90°).
Matters Needing Attention	Ensure the countersink angle matches the screw head angle for proper seating.
Common Standards	GB/T 2673, DIN 965, ISO 2009, ASME B18.6.3
Category	Countersunk, Plow & Elevator Bolts

Description

304 Stainless Steel GB820 Countersunk Head Phillips Screws Bolts, Semi-Flat Head Screws M2 M. 5 M3 M4 M5 M6 M8 M10 is part of our countersunk, plow & elevator bolts range (Bolts).

Key details

Type: Countersunk Head
Standard: GB
Material: Stainless Steel
Grade: 4.8
Length: 12mm
Head Style: Round
Groove: Cross
Surface Treatment: White Zinc

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 10,000 pieces at US$0.06 – 0.11 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 304 Stainless Steel GB820 Countersunk Head Phillips Screws Bolts, Semi-Flat Head Screws M2 M. 5 M3 M4 M5 M6 M8 M10?

The listed minimum order is 10,000 pieces, at US$0.06 – 0.11 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$0.11 for 10,000–49,999 pieces; US$0.06 for 50,001+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of 304 Stainless Steel GB820 Countersunk Head Phillips Screws Bolts, Semi-Flat Head Screws M2 M. 5 M3 M4 M5 M6 M8 M10?

Type: Countersunk Head; Standard: GB; Material: Stainless Steel; Grade: 4.8; Length: 12mm; Head Style: Round. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, head style, standard, grade and surface treatment. 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, plow & elevator bolts are available?

The Countersunk, Plow & Elevator Bolts category lists 533 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/

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$0.06 – 0.11MOQ 10,000 piecesGet a quote WA