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Screws › Countersunk & Flat-Head Machine Screws

Grade12.9 Black Csk Flat Head Screw From China

Updated 2026-11-04 · Markdown version

Model no. M6-20

US$0.012 – 0.12 / piece

MOQ 100,000 pieces · Final price confirmed in your quote

Head Style: Round
Standard: DIN, GB
Grade: 12.9
Thread: Metric
Surface Treatment: Black
Package Size: 1100.00cm * 800.00cm * 500.00cm
Material: Carbon Steel

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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

Model NO.	M6-20
Groove	Hexagon
Connection	Common Bolt
Head Style	Round
Standard	DIN, GB
Grade	12.9
Thread	Metric
Surface Treatment	Black
Usage	Machinery
MOQ	1ton
Transport Package	Carton+Wood Pallet
Specification	M6-M20
Origin	Hebei, China
HS Code	73182200
Production Capacity	250tons/Month
Package Size	1100.00cm * 800.00cm * 500.00cm
Package Gross Weight	25.000kg
Customization	Available
Material	Carbon Steel
Type	Round Head
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Tips	seclect Nominal Length L and get
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Nominal Length L - 5 6 8 10 12 16 20 25 30 35 40 45 50 55 60 65 70 80 90 100 Tips:seclect Nominal Length L and get Thread length.

M2.5

M10

M12

(M14)

M16

M20

min
P	Pitch
b	ref.
dk	Theoretical	max
Actual	max
ds	max
min
e	min
k	Ref.	max
min
s	Nominal Size
max
min
t	max
min
Minimum tensile load(N)-8.8
Minimum tensile load(N)-10.9
Minimum tensile load(N)-12.9
Minimum tensile load(N)-50
Minimum tensile load(N)-70
Minimum tensile load(N)-80

0.4	0.45	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5
-	-	18	20	22	24	28	32	36	42	48	60
4.7	5.88	6.72	8.96	11.2	13.44	17.92	22.4	26.88	30.8	33.6	40.32
4.09	5.08	5.81	7.96	10.07	12.16	16.43	20.69	24.81	28.31	30.61	36.75
3.7	4.8	5.54	7.53	9.43	11.34	15.24	19.22	23.12	26.52	29.01	35.4
2	2.5	3	4	5	6	8	10	12	14	16	20
1.86	2.36	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
1.454	1.733	2.303	2.873	3.443	4.583	5.723	6.863	9.149	11.429	11.429	13.716
1.35	1.69	1.86	2.48	3.1	3.72	4.96	6.2	7.44	8.4	8.8	10.16
1.13	1.408	1.522	2.121	2.669	3.218	4.366	5.563	6.711	7.588	7.874	9.037
1.3	1.5	2	2.5	3	4	5	6	8	10	10	12
1.36	1.56	2.08	2.58	3.08	4.095	5.14	6.14	8.175	10.175	10.175	12.212
1.32	1.52	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	10.025	12.032
0.85	1.15	1.25	1.65	2	2.5	3.2	3.9	4.9	5.1	5.4	6.4
0.75	1	1.1	1.4	1.75	2.2	2.9	3.5	4.3	4.5	4.8	5.6
1330	2180	3220	5620	9080	12900	23400	37100	53900	73600	100000	162000
1730	2820	4180	7300	11800	16700	30500	48200	70200	96000	130000	204000
2020	3310	4910	8560	13800	19600	35700	56600	82400	112000	154000	239000
830	1360	2010	3510	5680	8060	14600	23200	33710	46180	62670	97920
1160	1900	2810	4910	7950	11270	20400	32400	47190	64650	87760	137120
1330	2180	3220	5620	9080	12880	23430	37120	53940	73890	100320	156720

Length of Thread b

,e mim=1.14 S min ,80% of the values for Fm,min as specified in ISO 898-1. ,80% of the values for Fm,min as specified in ISO 3506-1.

FAQ

Threaded rod, Hex bolt, Hex Nut, Flat washer, Screws, Anchors, Blind rivet, etc

It depends on sizes, Usually 200 kgs to 1000 kgs.

From 7 days to 75 days, depends on your sizes and quantity.

T/T, LC, DP, etc.

Due to a lot of kinds of fasteners, we quote prices accoridng to sizes, quantity, packing only.

Sure, free sampls will be provided

Description

Grade12.9 Black Csk Flat Head Screw From China is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Round Head
Standard: DIN, GB
Material: Carbon Steel
Grade: 12.9
Thread: Metric
Head Style: Round
Groove: Hexagon
Surface Treatment: Black

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 100,000 pieces at US$0.012 – 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 Grade12.9 Black Csk Flat Head Screw From China?

The listed minimum order is 100,000 pieces, at US$0.012 – 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 Grade12.9 Black Csk Flat Head Screw From China?

Type: Round Head; Standard: DIN, GB; Material: Carbon Steel; Grade: 12.9; Thread: Metric; Head Style: Round. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include head style, standard, grade, thread 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

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

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US$0.012 – 0.12MOQ 100,000 piecesGet a quote WA