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Screws › Countersunk & Flat-Head Machine Screws

Brass Countersunk Hexagon Insert Nut, Precision CNC Machined Copper Fastener for Equipment, OEM Custom Machining

Updated 2026-11-04 · Markdown version

US$0.125,000–19,999 pieces

US$0.08420,000–49,999 pieces

US$0.02450,000+ pieces

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

Material: Stainless Steel
Head Style: Round
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO
Grade: 10.9
Surface: Plain, Zinc Plated (Blue, White, Black, Yellow), N
Exterior Finish: Customized
Customized: Available
Head: Hexagonal

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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	Hexagon Head
Connection	Common Bolt
Head Style	Round
Standard	DIN, ANSI, GB, JIS, GOST, BSW, ISO
Grade	10.9
Surface	Plain, Zinc Plated (Blue, White, Black, Yellow), N
Quality	100% Tested
Price	Factory Price
Lead Time	15-30 Days
Package	Standard Package or Customer's Packing
Box	Customer's Brand Box/Plain Box
MOQ	Can Be Negotiated
Shipment	by Sea / Truck / Plane / Express
Exterior Finish	Customized
Sample	Available
Customized	Available
Service	One-Stop Service
Online Sales	24 Hours Online
OEM/ODM	Available
Head	Hexagonal
Transport Package	Bulk Packaging, Small Box(Glue Box, Color Box)
Specification	M4-M72
Origin	Ningbo Zhejiang
HS Code	7318160000
Production Capacity	500tons/Month
Package Size	10.00cm * 5.00cm * 5.00cm
Package Gross Weight	0.550kg
Standards	GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC
Size	M4-M72 or non-standard asa request & design
Finish	Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc.
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Stainelss Steel Hex Head Hexagon Domed Cap Nut
Material:	Carbon Steel, Stainless Steel, Brass etc.
Standards:	GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC
Size:	M4-M72 or non-standard asa request & design
Finish:	Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc.
Grade:	A2-70, A4-70, A4-80, 4.8, 8.8, 10.9, 12.9

Thread Size d	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
P	Coarse thread	series 1	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
Fine thread	series 2	/	/	/	1	1.25	1.5	1.5	1.5	2	2
series 3	/	/	/	/	1	1.25	/	/	1.5	1.5
da	max	4.6	5.75	6.75	8.75	10.8	13	15.1	17.3	19.5	21.6
min	4	5	6	8	10	12	14	16	18	20
dw	min	5.9	6.9	8.9	11.6	14.6	16.6	19.6	22.5	24.9	27.7
e	min	7.66	8.79	11.05	14.38	17.77	20.03	23.35	26.75	29.56	32.95
x	max	series 1	1.05	1.2	1.5	1.87	2.25	3.5	4	4	5	5
series 2	/	/	/	1.5	1.87	3	3	3	4	4
series 3	/	/	/	/	1.5	2.5	/	/	3	3
g	max	series 1	2.75	3	3.7	4.9	5.6	6.4	7.3	7.3	9.3	9.3
series 2	/	/	/	3.7	4.9	5.6	5.6	5.6	7.3	7.3
series 3	/	/	/	/	3.7	4.9	-	-	5.6	5.6
h	max=nominal size	5.5	7	9	12	14	16	18	20	22	25
min	5.2	6.64	8.64	11.57	13.57	15.57	17.57	19.48	21.48	24.48
r	≈	8	10	12	15	20	25	28	30	32	35
s	max=nominal size	7	8	10	13	16	18	21	24	27	30
min	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.16	29.16
t	max	4.64	5.44	7.29	9.79	11.35	13.85	15.35	17.35	19.42	21.42
min	4.16	4.96	6.71	9.21	10.65	13.15	14.65	16.65	18.58	20.58
w	min	1	1	1.5	2	2	2	2	2	2	2.5
per 1000 units ≈ kg	1.3	2.2	4	9.5	15.6	23	35	46.5	70	94

A1: Our screws comply with DIN, ISO, ANSI, and JIS standards, and can also be customized according to customer drawings.

A2: We supply a full range of nuts including hex nuts, flange nuts, lock nuts, nylon-insert nuts, square nuts, cap nuts, weld nuts, T-nuts, wing nuts, and non-standard custom nuts.

A3: Yes, we offer free or low-cost samples for quality and dimension confirmation prior to order.

A4: Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards.

A5: Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling.

A6: A2 (304) is ideal for standard outdoor and industrial use, while A4 (316) contains molybdenum, offering higher corrosion resistance for marine, chemical, and salt-spray environments.

A7: Yes. We can supply pre-packed sets or assembly kits customized for distributors or hardware chains.

Description

Brass Countersunk Hexagon Insert Nut, Precision CNC Machined Copper Fastener for Equipment, OEM Custom Machining is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Hexagon Head
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO
Material: Stainless Steel
Grade: 10.9
Size: M4-M72 or non-standard asa request & design
Head Style: Round
Finish: Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc.
Connection: Common Bolt

Available configurations include material, head style, standard, grade and surface. 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 – 0.12 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 Brass Countersunk Hexagon Insert Nut, Precision CNC Machined Copper Fastener for Equipment, OEM Custom Machining?

The listed minimum order is 5,000 pieces, at US$0.024 – 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.

How does the price change with quantity?

Volume pricing: US$0.12 for 5,000–19,999 pieces; US$0.084 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 Brass Countersunk Hexagon Insert Nut, Precision CNC Machined Copper Fastener for Equipment, OEM Custom Machining?

Type: Hexagon Head; Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO; Material: Stainless Steel; Grade: 10.9; Size: M4-M72 or non-standard asa request & design; 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 material, head style, standard, grade and surface. 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 →

Request a quote for this product

US$0.024 – 0.12MOQ 5,000 piecesGet a quote WA