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Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw
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Screws › Socket Head Cap & Allen Screws

Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw

Updated 2026-11-04 · Markdown version

Model no. M2-M12

US$0.03610,000–49,999 pieces US$0.01250,000–999,999 pieces US$0.0061,000,000+ pieces

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

Material
Carbon Steel
Head Style
Counter Sunk Bolt
Standard
DIN, ANSI
Grade
12.9
Packing
Carton + Pallet
Finish
Plain, Galvanzied, Passivation ,HDG,Nickel Plated
Size
M4-M24 ,or non-standard as request&design
Non-standards
OEM is available, according to drawing or samples
Get a quote

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

CustomizationAvailable
MaterialCarbon Steel
TypeCountersunk Head
Model NO.M2-M12
GrooveCross
ConnectionCommon Bolt
Head StyleCounter Sunk Bolt
StandardDIN, ANSI
Grade12.9
NameBlack Gr12.9 DIN7991 Csk Socket Head Machine Screw
SamplesFree
Delivery Time7~25days
Payment TermL/C&T/T
PackingCarton + Pallet
CertificationISO, RoHS, SGS, TUV
FinishPlain, Galvanzied, Passivation ,HDG,Nickel Plated
Transport PackageCarton + Pallet
SpecificationM2-m12
OriginJiaxing Zheng, China
HS Code7318159090
Production Capacity50ton/ Weeks
SizeM4-M24 ,or non-standard as request&design
Stainless SteelSS303, SS304, SS316,
SteelC45(K1045), C46(K1046),C20,etc.
BrassC36000 ( C26800), C37700 ( HPb59), C38500( HPb58)etc.
BronzeC51000, C52100, C54400, etc.
Iron1213, 12L14,1215,etc.
AluminumAl6061, Al6063, etc.
Alloy steelSCM435,10B21, C10B33,etc.
Carbon steelC1006,C1010,C1018,C1022,C1035K,12L14,etc.
Non-standardsOEM is available, according to drawing or samples
Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.
ISO 90012015 and ISO 14001:2015
Packageaccording to customers requirement
BOLTDIN928,DIN933, DIN931, DIN912,DIN603,DIN7985,DIN7991,DIN6921, ASME/ANSI B 18.2.1ASME/ANSIB18.2.3.1M,GB, BSW, ISO Hex bolt , carriage bolt, heavy hex bolt, flange head bolt, achor bolt ect
NutDIN934,DIN6923,DIN985,ISO4032 hex heavy hex nut, 2H nut,A563/A563M cap nut, nylon nut, ect
Rodthreaded rod DIN975,DIN976, threaded bar DIN975 stud bolt, B7 stud bolt ect
Screwhex screw,DIN912; self drilling screw, DIN7504; self tapping screw,DIN7981/7982; drywall screw, pan head screw, button head screw, machine screw, chipboard screw,furniture screw,wood screw, ect
washerflat washer DIN125, spring washer DIN127, lock washer,square washer,spring lock washer, plain washer ect
CategorySocket Head Cap & Allen Screws

Technical parameters

Name:Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw
Size:M4-M24 ,or non-standard as request&design
Material:Stainless Steel:SS303, SS304, SS316,
Steel:C45(K1045), C46(K1046),C20,etc.
Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58)etc.
Bronze: C51000, C52100, C54400, etc.
Iron: 1213, 12L14,1215,etc.
Aluminum: Al6061, Al6063, etc.
Alloy steel: SCM435,10B21, C10B33,etc.
Carbon steel: C1006,C1010,C1018,C1022,C1035K,12L14,etc.
Grade:a2 a4etc
Standard:GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
Non-standards:OEM is available, according to drawing or samples
Heat Treatment:Tempering,Hardening,Spheroidizing,Stress Relieving.
Finish:Plain, black, zinc plated/according to your requirement
Certification:ISO 9001:2015 and ISO 14001:2015
Package:according to customers requirement

Description

Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw is part of our socket head cap & allen screws range (Screws).

Key details

  • Type: Countersunk Head
  • Standard: DIN, ANSI
  • Material: Carbon Steel
  • Grade: 12.9
  • Size: M4-M24 ,or non-standard as request&design
  • Head Style: Counter Sunk Bolt
  • Groove: Cross
  • Finish: Plain, Galvanzied, Passivation ,HDG,Nickel Plated

Available configurations include material, head style, standard, grade and packing. 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 – 0.036 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 Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw?

The listed minimum order is 10,000 pieces, at US$0.006 – 0.036 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$0.036 for 10,000–49,999 pieces; US$0.012 for 50,000–999,999 pieces; US$0.006 for 1,000,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw?

Type: Countersunk Head; Standard: DIN, ANSI; Material: Carbon Steel; Grade: 12.9; Size: M4-M24 ,or non-standard as request&design; Head Style: Counter Sunk Bolt. 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 packing. 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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