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Screws › Countersunk & Flat-Head Machine Screws

Stainless Steel Countersunk Screw Retainer Ring

Updated 2026-11-04 · Markdown version

Model no. Retainer ring

US$0.061,000–9,999 pieces

US$0.03610,000–99,999 pieces

US$0.012100,000+ pieces

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

Head Style: Flat
Standard: DIN
Grade: 4.8
Packing: Carton+Pallet
Package Size: 36.00cm * 26.00cm * 36.00cm
Material: Stainless Steel

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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

Model NO.	Retainer ring
Connection	Common Ring
Head Style	Flat
Standard	DIN
Grade	4.8
MOQ	1000PCS
Packing	Carton+Pallet
Delivery Time	7-15 Working Days
Measuring System	Metric
Sample	Available
Application	Industry
Advantage	OEM Customized Service Provided
Item	China Fastener
Certificate	CE, SGS, ISO
Product Name	Retainer Ring
Service	OEM/ODM
Quality	High Practicability
Transport Package	Carton
Specification	2mm-8mm
Origin	Jiangsu, Taizhou
Package Size	36.00cm * 26.00cm * 36.00cm
Package Gross Weight	0.880kg
Customization	Available
Material	Stainless Steel
Type	Hexagon Head
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Specification	3	4	5	6	7	8	9	10	11	12
s	Max	0.4	0.4	0.6	0.7	0.8	0.8	1	1	1	1
Min	0.35	0.35	0.55	0.65	0.75	0.75	0.94	0.94	0.94	0.94
d3	Nominal	2.7	3.7	4.7	5.6	6.5	7.4	8.4	9.3	10.2	11
Max	2.74	3.74	4.74	5.64	6.56	7.46	8.46	9.4	10.3	11.1
Min	2.55	3.55	4.55	5.45	6.32	7.22	8.22	8.94	9.84	10.64
a	Max	1.9	2.2	2.5	2.7	3.1	3.2	3.3	3.3	3.3	3.3
n	≈	0.8	0.9	1.1	1.3	1.4	1.5	1.7	1.8	1.8	1.8
d5	Min	1	1	1	1.2	1.2	1.2	1.2	1.5	1.5	1.7

Description

Stainless Steel Countersunk Screw Retainer Ring is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Hexagon Head
Standard: DIN
Material: Stainless Steel
Grade: 4.8
Head Style: Flat
Connection: Common Ring
Application: Industry
Packing: Carton+Pallet

Available configurations include head style, standard, grade, packing and package size. 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 Stainless Steel Countersunk Screw Retainer Ring?

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.

How does the price change with quantity?

Volume pricing: US$0.06 for 1,000–9,999 pieces; US$0.036 for 10,000–99,999 pieces; US$0.012 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 Stainless Steel Countersunk Screw Retainer Ring?

Type: Hexagon Head; Standard: DIN; Material: Stainless Steel; Grade: 4.8; Head Style: Flat; Connection: Common Ring. 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, packing and package size. 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$0.012 – 0.06MOQ 1,000 piecesGet a quote WA