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Screws › Countersunk & Flat-Head Machine Screws

Metric Thread SS304/316 Allen Countersunk Head Machine Screws DIN7991

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.012 – 0.12 / piece

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

Material: Stainless Steel
Head Style: Counter Sunk Bolt
Standard: DIN
Grade: A2-70/A4-80
Finish: Plain
Model Number: DIN7991
Head Type: Csk Head
Size: M1.6-M16

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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	Stainless Steel
Type	Countersunk Head
Model NO.	DIN7991
Groove	Hexagon
Head Style	Counter Sunk Bolt
Standard	DIN
Grade	A2-70/A4-80
Finish	Plain
Place of Origin	Jiangsu, China
Model Number	DIN7991
Head Type	Csk Head
Size	M1.6-M16
Color	Silvery
Certificate	CE;ISO9001
Length	3-160mm
Measurement	Metric
Specification	M1.6-M16
Origin	Taizhou
HS Code	7318159090
Production Capacity	15tons/Month
Package Size	36.00cm * 26.00cm * 16.00cm
Package Gross Weight	0.880kg
Product name	Hex Socket Flat Head Screw
Stainless steel screws have the following characteristics	strong corrosion resistance, good high-temperature resistance, easy installation, durable, beautiful.
The factory mainly produces curtain wall accessories	aluminum alloy pendant, stainless steel back bolt, curtain wall spring pin, wedge anchor bolt.
Stainless steel standard parts	201 and 304 and 316 stainless steel self tapping screws, machine screws, self drilling screws and other product.
Machine thread	when assembling, drill holes and tap teeth on the assembly first. The tapped inner teeth have the same specifications as the outer teeth of the screw, and assemble with small torque.
Self tapping thread	When assembling, drill holes on the assembly first, do not need to tap the inner teeth, and use large torque assembly.
Self drilling thread	directly used on the assembly, screw drilling and tapping molding.
Standard parts	7-15days Non-standard parts: 15-25days We will make the delivery as soon as possible with the guarantee quality.
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Product name:	Hex Socket Flat Head Screw
Material:	Stainless Steel
Size:	M3-M6
Finish:	Polish

Description

Metric Thread SS304/316 Allen Countersunk Head Machine Screws DIN7991 is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Countersunk Head
Standard: DIN
Material: Stainless Steel
Grade: A2-70/A4-80
Size: M1.6-M16
Length: 3-160mm
Head Type: Csk Head
Head Style: Counter Sunk Bolt

Available configurations include material, head style, standard, grade and finish. 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 – 0.12 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 Metric Thread SS304/316 Allen Countersunk Head Machine Screws DIN7991?

The listed minimum order is 1,000 pieces, at US$0.012 – 0.12 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 Metric Thread SS304/316 Allen Countersunk Head Machine Screws DIN7991?

Type: Countersunk Head; Standard: DIN; Material: Stainless Steel; Grade: A2-70/A4-80; Size: M1.6-M16; Length: 3-160mm. 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 finish. 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

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US$0.012 – 0.12MOQ 1,000 piecesGet a quote WA