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Screws › Self-Tapping & Thread-Forming Screws

Oxidation Resistance Countersunk Head Custom Self-Tapping Screw for DIY Carpentry

Updated 2026-11-04 · Markdown version

Model no. ST2.2, ST2.9, ST3.5, ST4.2, ST4.8, ST5.5

US$0.012 – 0.06 / piece

MOQ 1,000 pieces · Final price confirmed in your quote

Material: Carbon Steel, Stainless Steel
Shape of Head: Round
Surface Finishing: Polishing
Customized: Customized
Standard: GB / DIN / ISO
Size: Customizable
Head Style: Round
OEM Custom: Yes

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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

Customization	Available
Material	Carbon Steel, Stainless Steel
Shape of Head	Round
Model NO.	ST2.2, ST2.9, ST3.5, ST4.2, ST4.8, ST5.5
Surface Finishing	Polishing
Customized	Customized
Product Name	Self-Tapping Screw
Keywords	Countersunk Head Self-Tapping Screw
Standard	GB / DIN / ISO
MOQ	1000PCS
Connection	Common Bolt
Size	Customizable
Delivery Time	7-15 Working Days
Head Style	Round
Groove	Cross / Torx / Square
Certificate	ISO9001 / ISO14001 / ISO45001 / IATF16949
Feature	Durable, High Hardness, Environmental
Application	Decoration, Industry, Equipment
OEM Custom	Yes
ODM Custom	Yes
Sample	Yes
Transport Package	Carton+Pallet
Specification	ST2.2, ST2.9, ST3.5, ST4.2, ST4.8, ST5.5
Origin	Jiangsu, China
Production Capacity	400tons/Month
Category	Self-Tapping & Thread-Forming Screws

Technical parameters

Thread Specification	ST2.2	ST2.9	ST3.5	(ST3.9)	ST4.2	ST4.8	ST5.5
P	Thread Pitch	0.8	1.1	1.3	1.3	1.4	1.6	1.8
a	Max	0.8	1.1	1.3	1.3	1.4	1.6	1.8
dk	Max=Nominal	4.3	5.5	6.8	7.5	8.1	9.5	10.8
Min	4	5.2	6.44	7.14	7.74	9.14	10.37
k	≈	1.3	1.7	2.1	2.3	2.5	3	3.4
y	Max	Type C	2	2.6	3.2	3.5	3.7	4.3	5
Type F	1.6	2.1	2.5	2.7	2.8	3.2	3.6
Slot Number	1	1	2	2	2	2	3
M1	≈		2.5	3	4.2	4.6	4.7	5.1	6.8
M2	≈		2.4	2.8	4	4.2	4.4	5	6.3

Thread Specification	ST2.2	ST2.9	ST3.5	(ST3.9)	ST4.2	ST4.8	ST5.5
P	Thread Pitch	0.8	1.1	1.3	1.3	1.4	1.6	1.8
a	Max	0.8	1.1	1.3	1.3	1.4	1.6	1.8
dk	Max=Nominal	4.3	5.5	6.8	7.5	8.1	9.5	10.8
Min	4	5.2	6.44	7.14	7.74	9.14	10.37
f	≈
k	≈	1.3	1.7	2.1	2.3	2.5	3	3.4
y	Type C	2	2.6	3.2	3.5	3.7	4.3	5
Type F	1.6	2.1	2.5	2.7	2.8	3.2	3.6
Slot Number	1	1	2	2	2	2	3
M1	≈	2.5	3	4.2	4.6	4.7	5.1	6.8
M2	≈	2.4	2.8	4	4.2	4.4	5	6.3

Description

Oxidation Resistance Countersunk Head Custom Self-Tapping Screw for DIY Carpentry is part of our self-tapping & thread-forming screws range (Screws).

Key details

Standard: GB / DIN / ISO
Material: Carbon Steel, Stainless Steel
Size: Customizable
Head Style: Round
Groove: Cross / Torx / Square
Connection: Common Bolt
Application: Decoration, Industry, Equipment
Shape of Head: Round

Available configurations include material, shape of head, surface finishing, customized and standard. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 1,000 pieces at US$0.012 – 0.06 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 Oxidation Resistance Countersunk Head Custom Self-Tapping Screw for DIY Carpentry?

The listed minimum order is 1,000 pieces, at US$0.012 – 0.06 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

What are the main specifications of Oxidation Resistance Countersunk Head Custom Self-Tapping Screw for DIY Carpentry?

Standard: GB / DIN / ISO; Material: Carbon Steel, Stainless Steel; Size: Customizable; Head Style: Round; Groove: Cross / Torx / Square; Connection: Common Bolt. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, shape of head, surface finishing, customized and standard. 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 self-tapping & thread-forming screws are available?

The Self-Tapping & Thread-Forming Screws category lists 4,881 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/self-tapping-thread-forming-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 →

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US$0.012 – 0.06MOQ 1,000 piecesGet a quote WA