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Screws › Countersunk & Flat-Head Machine Screws

DIN 7991 Hexagon Socket Countersunk Head Cap Screws, Black Finished.

Updated 2026-11-04 · Markdown version

Model no. M6X30

US$0.0963,000–9,999 pieces

US$0.0610,000–49,999 pieces

US$0.03650,000–99,999 pieces

US$0.024100,000+ pieces

MOQ 3,000 pieces · Final price confirmed in your quote

Material: Carbon Steel
Head Style: Hexagonal
Standard: DIN, ANSI, JIS, BSW, GOST
Grade: 10.9
Finish: Black
Standard parts: 7-
Non-standard parts: 25

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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	Carbon Steel
Type	Hexagon Head
Model NO.	M6X30
Connection	Common Bolt
Head Style	Hexagonal
Standard	DIN, ANSI, JIS, BSW, GOST
Grade	10.9
Application	Machinery, Chemical Industry, Environmental
Finish	Black
Transport Package	Approx 25kg/Carton, 36 Carton/Pallet.
Specification	DIN7991, GB, Jisb, ISO, ANSI/Asme B, W. S. W
Origin	China
HS Code	7318160000
Production Capacity	3000 Tons Per Year
ABOUT US	Wellbolt is an excellent fasteners & metal production manufacturer and exporter in China,from the beginning of the production of bolts and screws, established its full range fastener distribution line 3 years later.
All our processes strictly adhere to ISO9001	2008 procedures. We have strict quality control from producing to
Standard parts	7-
Non-standard parts	25
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Product	DIN7991 Hex Socket Countersunk Head Cap screws
Grade	Grade 4.8, 8.8, 10.9,12.9, A2-70,A4-80
Material	Carbon Steel, Alloy Steel, Stainless Steel, Aluminum, Brass
Coating	Galvanized, Black Oxide, Dacromet, etc
Size	M3-M24
Packing	Small box, Bags, Carton

Screw Thread d	M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
P	Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
α	tol.(+2)	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	60°	60°
b	L≤125	12	14	16	18	22	26	30	34	38	42	46	50	54
125<L ≤ 200	/	/	/	24	28	32	36	40	44	48	52	56	60
L>200	/	/	/	/	/	45	49	53	57	61	65	69	73
dk	max=nominal size	6	8	10	12	16	20	24	27	30	33	36	36	39
min	5.7	7.64	9.64	11.57	15.57	19.48	23.48	26.48	29.48	32.38	35.38	35.38	38.38
ds	max=nominal size	3	4	5	6	8	10	12	14	16	18	20	22	24
min	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67
e	min	2.3	2.87	3.44	4.58	5.72	6.86	9.15	11.43	11.43	13.72	13.72	16	16
k	max	1.7	2.3	2.8	3.3	4.4	5.5	6.5	7	7.5	8	8.5	13.1	14
s	Nominal Size	2	2.5	3	4	5	6	8	10	10	12	12	14	14
min	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	10.025	12.032	12.032	14.032	14.032
max	2.1	2.6	3.1	4.12	5.14	6.14	8.175	10.175	10.175	12.212	12.212	14.212	14.212
t	max=nominal size	1.2	1.8	2.3	2.5	3.5	4.4	4.6	4.8	5.3	5.5	5.9	8.8	10.3
min	0.95	1.55	2.05	2.25	3.2	4.1	4.3	4.5	5	5.2	5.6	8.44	9.87

Description

DIN 7991 Hexagon Socket Countersunk Head Cap Screws, Black Finished. is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Hexagon Head
Standard: DIN, ANSI, JIS, BSW, GOST
Material: Carbon Steel
Grade: 10.9
Head Style: Hexagonal
Finish: Black
Connection: Common Bolt
Application: Machinery, Chemical Industry, Environmental

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 3,000 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 DIN 7991 Hexagon Socket Countersunk Head Cap Screws, Black Finished.?

The listed minimum order is 3,000 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 3,000–9,999 pieces; US$0.06 for 10,000–49,999 pieces; US$0.036 for 50,000–99,999 pieces; US$0.024 for 100,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of DIN 7991 Hexagon Socket Countersunk Head Cap Screws, Black Finished.?

Type: Hexagon Head; Standard: DIN, ANSI, JIS, BSW, GOST; Material: Carbon Steel; Grade: 10.9; Head Style: Hexagonal; Finish: Black. 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 finish. 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

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US$0.024 – 0.096MOQ 3,000 piecesGet a quote WA