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Screws › Countersunk & Flat-Head Machine Screws

Hexagon Socket Flat Countersunk Head Cap Screws

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.006 – 0.36 / piece

MOQ 10,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Butterfly or Wing
Standard: DIN, GB, ANSI, BSW, JIS, GOST
Grade: 8.8
Size: M3-M10
Package Size: 100.00cm * 100.00cm * 100.00cm

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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	Stainless Steel
Type	Butterfly
Model NO.	DIN7991
Groove	Butterfly
Connection	Common Bolt
Head Style	Butterfly or Wing
Standard	DIN, GB, ANSI, BSW, JIS, GOST
Grade	8.8
Delivery	7-15days
Pay Term	Tt 30% Deposit
Size	M3-M10
Certificate	ISO9001
Transport Package	Cartonboxes
Specification	M3-M10
Origin	China
HS Code	7318159090
Production Capacity	500ton/Month
Package Size	100.00cm * 100.00cm * 100.00cm
Package Gross Weight	500.000kg
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

PARAMETERS
Item	Hexagon socket countersunk screw
Spec	M2-M10
Material	Stainless Steel, carbon steel,copper
Grade	4.8, 8.8, 10.9, 12.9
Standard	GB, DIN, UNS,JIS
Surface Finish	Natural, Black, White-plated zinc, Color zinc, Nickel, Dacromet, Polished, Zinc-nickel alloy, Hot-dip galvanized, etc.
Delivery Time	7-20Days
Package	cartonboxes or PE bag

Description

Hexagon Socket Flat Countersunk Head Cap Screws is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Butterfly
Standard: DIN, GB, ANSI, BSW, JIS, GOST
Material: Stainless Steel
Grade: 8.8
Size: M3-M10
Head Style: Butterfly or Wing
Groove: Butterfly
Connection: Common Bolt

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 10,000 pieces at US$0.006 – 0.36 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 Hexagon Socket Flat Countersunk Head Cap Screws?

The listed minimum order is 10,000 pieces, at US$0.006 – 0.36 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 Hexagon Socket Flat Countersunk Head Cap Screws?

Type: Butterfly; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Stainless Steel; Grade: 8.8; Size: M3-M10; Head Style: Butterfly or Wing. 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 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 →

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US$0.006 – 0.36MOQ 10,000 piecesGet a quote WA