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Screws › Countersunk & Flat-Head Machine Screws

DIN7991 Carbon Steel Hexagon Socket Countersunk Head Screw

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.30 / piece

MOQ 500 pieces · Final price confirmed in your quote

Head Style: Hexagonal
Standard: DIN, GB, ANSI, BSW, JIS, GOST
Grade: 4,6,8,10
Material: Carbon Steel
Size: M4--M100
Surface treament: Black,zinc plated,zinc(yellow)plated,H.D.G ,Dacroment
Packing: 25kgs per box,36 boxes per pallet,900kgs per pallet.
Headmark: Customized

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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.	DIN7991
Groove	Hexagon Socket Head
Connection	Common Bolt
Head Style	Hexagonal
Standard	DIN, GB, ANSI, BSW, JIS, GOST
Grade	4,6,8,10
Model No.	DIN7991
Delivery	30-45 Work Days
Market	Global
Transport Package	25kgs Per Box,36 Boxes Per Pallet,900kgs Per Palle
Specification	M4-M100
Origin	Ningbo, China
HS Code	7318150000
Production Capacity	1500ton/Month
Customization	Available
Material	Carbon Steel
Type	Hexagon Head
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Product name	Hexagonal countersunk machine screw DIN7991
Size	M4--M100
Surface treament	Black,zinc plated,zinc(yellow)plated,H.D.G ,Dacroment
Packing	25kgs per box,36 boxes per pallet,900kgs per pallet.
Headmark	Customized
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Product name:	Hexagonal countersunk machine screw DIN7991
Grade:	4,6,8,10,
Size:	M4--M100
Surface treament:	Black,zinc plated,zinc(yellow)plated,H.D.G ,Dacroment
Material:	Carbon steel,stainless steel,alloy steel
Packing:	25kgs per box,36 boxes per pallet,900kgs per pallet.
Standard	DIN, ANSI, GB, JIS, BSW, GOST ,ASTM ,AS
Headmark:	Customized
Head type	Hexagonal,Round,Square

Description

DIN7991 Carbon Steel Hexagon Socket Countersunk Head Screw is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Hexagon Head
Standard: DIN, GB, ANSI, BSW, JIS, GOST
Material: Carbon Steel
Grade: 4,6,8,10
Size: M4–M100
Head Style: Hexagonal
Groove: Hexagon Socket Head
Connection: Common Bolt

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 500 pieces at US$0.30 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 DIN7991 Carbon Steel Hexagon Socket Countersunk Head Screw?

The listed minimum order is 500 pieces, at US$0.30 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 DIN7991 Carbon Steel Hexagon Socket Countersunk Head Screw?

Type: Hexagon Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Carbon Steel; Grade: 4,6,8,10; Size: M4--M100; Head Style: Hexagonal. 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, material and 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

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US$0.30MOQ 500 piecesGet a quote WA