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Flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.012 / piece

MOQ 30,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Standard: DIN, GB, ANSI, BSW, JIS, ISO
Grade: 10.9
Size 1: M3-M20
Size 2: 1/4-3/4"
Materials: Stainless Steel
Package Size: 0.50cm * 0.30cm * 0.20cm
Diameter from M3-M30, Inch size: 10# to 1-1/4"

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	Screw
Model NO.	DIN7991
Groove	Hexagon
Connection	Common Bolt
Standard	DIN, GB, ANSI, BSW, JIS, ISO
Grade	10.9
Product Name	DIN7991 Socket Flat Screw
Size 1	M3-M20
Size 2	1/4-3/4"
Materials	Stainless Steel
Transport Package	Neutral Packing
Specification	M3-M20
Origin	China
HS Code	731815
Production Capacity	10 Million/Month
Package Size	0.50cm * 0.30cm * 0.20cm
Package Gross Weight	0.500kg
Diameter from M3-M30, Inch size	10# to 1-1/4"
Surface Treatment	Plain (Black oxide), Zinc Plated (White/Yellow), H.D.G and etc.
ISO9001	2008, SGS, ROHS
Package	Each carton weighs 25-30KGS and contains 36-48 cartons per pallet.
Produce Time	Standard sizes are usually in stock and can be shipped within 15-30 working days. Non-standard sizes will depend on the quantity ordered.
Shipping Way	For orders weighing less than 100KGS, we offer shipping by air or express services such as FedEx, UPS, or DHL. If the order exceeds 100KGS, we can arrange sea shipping through our agent. If you have your own agent, we can work with them as well.
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How to Get a Quotation	To receive a quotation, simply provide us with detailed information about your requirements. The more specific you are about the item number, style, logo, size, material, surface treatment, and quantity, the better. You can leave us an inquiry or email us, and we will respond promptly.
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Sample	7-10 working days (Standard)
Bulk order	15-30 working days (Standard)
Category	Socket Head Cap & Allen Screws

Technical parameters

Material	1.Stainless Steel:SS304,SS316 2.Alloy Steel
Grade	8.8, 10.9, 12.9
Finish	Plain(Black oxide), Zinc Plated(White/Yellow), H.D.G and etc.
Thread	Metric,UNC,UNF,BSW
Standard	ISO, DIN, ASME, JIS, BS and Non-standard
Sample Service	Samples can be in free when you confirm our price is acceptable.
Certificate	ISO9001,CE, SGS
Advantage	1. Competitive price; 2. OEM service available
Packing	1. Bulk in cartons (25-30kg Max.)+wooden pallet 2. Small Boxes into outer carton + wooden pallet 3. According to customer special demand
Payment terms	FOB, CIF, CFR, L/C, or others.
Delivery method	by sea, by air or by express service
Lead Time	15-30 work days after order confirmed
Application	Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile; Home Decorating and etc.
Notes	Special specifications and marks can be made according to customers requirements;

Description

Flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991 is part of our socket head cap & allen screws range (Screws).

Key details

Type: Screw
Standard: DIN, GB, ANSI, BSW, JIS, ISO
Material: Stainless Steel
Grade: 10.9
Size: [Insert Size]
Groove: Hexagon
Surface Treatment: Plain (Black oxide), Zinc Plated (White/Yellow), H.D.G and etc.
Connection: Common Bolt

Available configurations include material, standard, grade, size 1 and size 2. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 30,000 pieces at US$0.012 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 Flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991?

The listed minimum order is 30,000 pieces, at US$0.012 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 Flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991flat Head Hex Socket Screw Hexagon Socket Countersunk Head Screws DIN 7991?

Type: Screw; Standard: DIN, GB, ANSI, BSW, JIS, ISO; Material: Stainless Steel; Grade: 10.9; Size: [Insert Size]; 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, standard, grade, size 1 and size 2. 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 socket head cap & allen screws are available?

The Socket Head Cap & Allen Screws category lists 2,042 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-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$0.012MOQ 30,000 piecesGet a quote WA