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Screws › Countersunk & Flat-Head Machine Screws

DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.12 / piece

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

Material: Carbon Steel
Head Style: Counter Sunk Bolt
Standard: DIN, GB, ANSI, JIS, GOST
Grade: 4.8,8.8,10.9,12.9
Surface Treatment: According to Requirements
Thread Type: Fine / Coarse /Bsw/Bsf/ Unc/Unf
Package Size: 10.00cm * 10.00cm * 10.00cm

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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
Type	Countersunk Head
Model NO.	DIN7991
Groove	Hexagon
Connection	Common Bolt
Head Style	Counter Sunk Bolt
Standard	DIN, GB, ANSI, JIS, GOST
Grade	4.8,8.8,10.9,12.9
Process	Cold Forging,Hot Forging,Machining
Salt Spray Test	According to Requirements
Surface Treatment	According to Requirements
Thread Type	Fine / Coarse /Bsw/Bsf/ Unc/Unf
Transport Package	Small Box & Bulk & Customizing
Specification	M3-M24
Origin	Ningbo, China
HS Code	7318150000
Production Capacity	2500tons/Year
Package Size	10.00cm * 10.00cm * 10.00cm
Package Gross Weight	1.000kg
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Available Material	Carbon steel,Stainless steel,Duplex Stainless steel Brass,Copper,Plastic,Aluminum
Surface Treatment	Zinc Plated/Galvanized,Nickel Plated,HDG,Copper Plated,Anodized,Polishing.
Powder Coating	Geomet,Dacromet,Passivation,Electrophoesis,
Equipments	Cold forging Machine,Thread Rolling Machine,CNC Machine,Lather Machine,
Processing Way	Grinding Machine,Milling Machine,Drilling Machine,Casting Machine
Cold Forging,Stamping,Rolling,Bending,Casting,Extrusion,Milling,Welding,Turning
Processing drawing Format	. jpg /. pdf / . dwg / . igs / . stp etc.
Trade Term	EXW, FOB, CIF, DDP, CFR,or as discussing
Payment Term	T/T,L/C,Western Uion
Packagement	Plastic Bag+Chipboard Carton +Plywood Pallet With Belt and Film

Description

DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8 is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Countersunk Head
Standard: DIN, GB, ANSI, JIS, GOST
Material: Carbon Steel
Grade: 4.8,8.8,10.9,12.9
Head Style: Counter Sunk Bolt
Groove: Hexagon
Surface Treatment: According to Requirements
Connection: Common Bolt

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 1,000 pieces at US$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 DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8?

The listed minimum order is 1,000 pieces, at US$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 DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8?

Type: Countersunk Head; Standard: DIN, GB, ANSI, JIS, GOST; Material: Carbon Steel; Grade: 4.8,8.8,10.9,12.9; Head Style: Counter Sunk Bolt; Groove: Hexagon. 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 & 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$0.12MOQ 1,000 piecesGet a quote WA