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Top Quality Ss 316 1/2″ Hex Socket Flat Head Screw

Updated 2026-11-04 · Markdown version

Model no. DIN7991

US$0.0965,000–9,999 pieces

US$0.04810,000–19,999 pieces

US$0.03620,000–49,999 pieces

US$0.02450,000+ pieces

MOQ 5,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Round
Standard: DIN, GB, ANSI, BSW, JIS, GOST, Per Customers' Desire
Grade: A2;A4
Size: M3-M20
Length: 6-100mm(1/4"-4")
Coating: Black Zinc, Black Oxide, Powder
Thread Type: Full Thread

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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
Connection	Common Bolt
Head Style	Round
Standard	DIN, GB, ANSI, BSW, JIS, GOST, Per Customers' Desire
Grade	A2;A4
Product Name	Socket Screw
Size	M3-M20
Length	6-100mm(1/4"-4")
Coating	Black Zinc, Black Oxide, Powder
Certificate	ISO;SGS; RoHS;CE;ISO9001
Feature	Rust Anti
Testing	Salt Spray Test
Screw Groove	Hex Socket
Usage	Kitchen, Marine, Outdoor, Window,Furniture Screw
Thread Type	Full Thread
Head Type	Countersunk
Delivery Time	7-15workdays
Sampling Time	3-5workdays
MOQ	5000PCS
Transport Package	251625cm Carton Box, Then Polywood Box Packed
Specification	M3-M20
Origin	Jiangsu
HS Code	7318159090
Production Capacity	500tons/Month
Package Size	12.50cm * 11.50cm * 7.00cm
Package Gross Weight	2.000kg
Category	Socket Head Cap & Allen Screws

Technical parameters

Material	Stainless Steel;Carbon Steel
Color	Plain
Diameter	M3-M20
Type	Hex Socket CSK Head Screw
OEM	made in china

Threaded Rods	Thumb screws	Socket Screws	Security Screws
Shoulder Screws	Rivets	Solar Hanger Bolt	Pins
Springs	Captive Screws	U/L/J bolts	Machine Screws

Description

Top Quality Ss 316 1/2″ Hex Socket Flat Head Screw is part of our socket head cap & allen screws range (Screws).

Key details

Type: Countersunk Head
Standard: DIN, GB, ANSI, BSW, JIS, GOST, Per Customers' Desire
Material: Stainless Steel
Grade: A2;A4
Size: M3-M20
Length: 6-100mm(1/4"-4")
Head Type: Countersunk
Head Style: Round

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 5,000 pieces at US$0.024 – 0.096 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 Top Quality Ss 316 1/2″ Hex Socket Flat Head Screw?

The listed minimum order is 5,000 pieces, at US$0.024 – 0.096 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

How does the price change with quantity?

Volume pricing: US$0.096 for 5,000–9,999 pieces; US$0.048 for 10,000–19,999 pieces; US$0.036 for 20,000–49,999 pieces; US$0.024 for 50,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of Top Quality Ss 316 1/2″ Hex Socket Flat Head Screw?

Type: Countersunk Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST, Per Customers' Desire; Material: Stainless Steel; Grade: A2;A4; Size: M3-M20; Length: 6-100mm(1/4"-4"). 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 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

More about us → · Request a sample or custom quote →

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US$0.024 – 0.096MOQ 5,000 piecesGet a quote WA