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Black Oxide M100 Class10 GB812 Round Nuts

Updated 2026-11-04 · Markdown version

Model no. GB812-M100-Black

US$4.601,000–4,999 pieces

US$4.465,000–9,999 pieces

US$4.3110,000+ pieces

MOQ 1,000 pieces · Final price confirmed in your quote

Material: Carbon Steel
Head Style: Round
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Grade: 10.9
Material Name: Steel 45
Surface Treatment: Black Oxide
Packing way: 25kg/carton, 1.5tons-2.5tons / pallet ; or as requested by buyer.

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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	Round Head
Model NO.	GB812-M100-Black
Connection	Common Bolt
Head Style	Round
Standard	DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Grade	10.9
Material Name	Steel 45
Property Class	Class 10
Surface Treatment	Black Oxide
Transport Package	Pallet+Carton
Specification	25kg/carton
Origin	China
HS Code	73181600
Production Capacity	2000000PCS/Month
Packing way	25kg/carton, 1.5tons-2.5tons / pallet ; or as requested by buyer.
P.S.	Please contact us to re-quote the exact price before placing an order, due to material price is unstable.
Category	Hex & Other Standard Nuts

Technical parameters

GB /T 812 - M100 - Class10 - Black Oxide

Mechnical Property	Material	Surface Treatment
Class 4 / 5/ 6/ 8/ 10/ 12	Steel 45 40Cr 35CrMo 42CrMo Q235 Steel20	Plain Black oxide Zinc Plated Phosphated Dacromet Geomet HDG

d	M16	M18	M20	M22	M24	M25	M27	M30	M33	M35	M36	M39	M40
dk	30	32	35	38	42	42	45	48	52	52	55	58	58
d1	22	24	27	30	34	34	37	40	43	43	46	49	49
m	8	8	8	10	10	10	10	10	10	10	10	10	10
n	5.3-5	5.3-5	5.3-5	5.3-5	5.3-5	5.3-5	5.3-5	5.3-5	6.3-6	6.3-6	6.3-6	6.3-6	6.3-6
t	3.1-2.5	3.1-2.5	3.1-2.5	3.1-2.5	3.1-2.5	3.1-2.5	3.1-2.5	3.1-2.5	3.6-3	3.6-3	3.6-3	3.6-3	3.6-3
c	0.5	0.5	0.5	0.5	1	1	1	1	1	1	1	1.5	1.5
c1	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5

d	M42	M45	M48	M50	M52	M55	M56	M60	M64	M65	M68	M72	M75
dk	62	68	72	72	78	78	85	90	95	95	100	105	105
d1	53	59	61	61	67	67	74	79	84	84	88	93	93
m	10	10	12	12	12	12	12	12	12	12	12	15	15
n	6.3-6	6.3-6	8.36-8	8.36-8	8.36-8	8.36-8	8.36-8	8.36-8	8.36-8	8.36-8	10.36-10	10.36-10	10.36-10
t	3.6-3	3.6-3	4.25-3.5	4.25-3.5	4.25-3.5	4.25-3.5	4.25-3.5	4.25-3.5	4.25-3.5	4.25-3.5	4.75-4	4.75-4	4.75-4
c	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
c1	0.5	0.5	0.5	0.5	0.5	0.5	1	1	1	1	1	1	1

d	M76	M80	M85	M90	M95	M100	M105	M110	M115	M120	M125	M130	M140
dk	110	115	120	125	130	135	140	150	155	160	165	170	180
d1	98	103	108	112	117	122	127	135	140	145	150	155	165
m	15	15	15	18	18	18	18	18	22	22	22	22	26
n	10.36-10	10.36-10	10.36-10	12.43-12	12.43-12	12.43-12	12.43-12	14.43-14	14.43-14	14.43-14	14.43-14	14.43-14	14.43-14
t	4.75-4	4.75-4	4.75-4	5.75-5	5.75-5	5.75-5	5.75-5	6.75-6	6.75-6	6.75-6	6.75-6	6.75-6	6.75-6
c	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
c1	1	1	1	1	1	1	1	1	1	1	1	1	1

Our Factory Introduction

Description

Black Oxide M100 Class10 GB812 Round Nuts is part of our hex & other standard nuts range (Nuts).

Key details

Type: Round Head
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Material: Carbon Steel
Grade: 10.9
Head Style: Round
Surface Treatment: Black Oxide
Connection: Common Bolt
Material Name: Steel 45

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 1,000 pieces at US$4.31 – 4.60 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 Oxide M100 Class10 GB812 Round Nuts?

The listed minimum order is 1,000 pieces, at US$4.31 – 4.60 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$4.60 for 1,000–4,999 pieces; US$4.46 for 5,000–9,999 pieces; US$4.31 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 Black Oxide M100 Class10 GB812 Round Nuts?

Type: Round Head; Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni; Material: Carbon Steel; Grade: 10.9; Head Style: Round; Surface Treatment: Black Oxide. 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 material name. 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$4.31 – 4.60MOQ 1,000 piecesGet a quote WA