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Durable External Hex Nut for Heavy-Duty Applications and Projects

Updated 2026-11-04 · Markdown version

Model no. GB /T 1231

US$0.35100–9,999 pieces

US$0.3110,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Hexagonal
Standard: DIN, GB
Grade: A2-70

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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
Model NO.	GB /T 1231
Connection	Common Bolt
Head Style	Hexagonal
Standard	DIN, GB
Grade	A2-70
Transport Package	Box
Specification	M20
Origin	Jiangsu, China
Category	Hex & Other Standard Nuts

Technical parameters

D
Thread Siz	M12	M16	M20	(M22)	M24	(M27)
P	Pitch	1.75	2	2.5	2.5	3	3
da	max	13	17.3	21.6	23.8	25.9	29.1
min	12	16	20	22	24	27
dw	min	19.2	24.9	31.4	33.3	38	42.8
e	min	22.78	29.56	37.29	39.55	45.2	50.85
m	max	12.3	17.1	20.7	23.6	24.2	27.6
min	11.87	16.4	19.4	22.3	22.9	26.3
mw	min	8.3	11.5	13.6	15.6	16	18.4
c	max	0.8	0.8	0.8	0.8	0.8	0.8
min	0.4	0.4	0.4	0.4	0.4	0.4
s	max	21	27	34	36	41	46
min	20.16	26.16	33	35	40	45
The supporting face verticality of thread axis	0.29	0.38	0.47	0.5	0.57	0.64
per 1000 units ≈ kg	25.3	56.86	109.07	135.33	188.56	270.66
The dimensions in the table are all uncoated dimensions.

Description

Durable External Hex Nut for Heavy-Duty Applications and Projects is part of our hex & other standard nuts range (Nuts).

Key details

Type: Hexagon Head
Standard: DIN, GB
Material: Stainless Steel
Grade: A2-70
Head Style: Hexagonal
Connection: Common Bolt

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 100 pieces at US$0.31 – 0.35 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 Durable External Hex Nut for Heavy-Duty Applications and Projects?

The listed minimum order is 100 pieces, at US$0.31 – 0.35 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$0.35 for 100–9,999 pieces; US$0.31 for 10,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of Durable External Hex Nut for Heavy-Duty Applications and Projects?

Type: Hexagon Head; Standard: DIN, GB; Material: Stainless Steel; Grade: A2-70; Head Style: Hexagonal; Connection: Common 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 and grade. 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 hex & other standard nuts are available?

The Hex & Other Standard Nuts category lists 8,354 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/

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$0.31 – 0.35MOQ 100 piecesGet a quote WA