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Threaded Inserts & Clinch Fasteners › Heat-Set, Knurled & Molded-In Inserts

M3 M8 Good Price Stainless Steel Square Knurled Internal Thread Insert Flat Hex Head Barrel Nut

Updated 2026-11-04 · Markdown version

Model no. nut

US$0.0842,000–4,999 pieces

US$0.0485,000–9,999 pieces

US$0.02410,000+ pieces

MOQ 2,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Square
Standard: DIN, ANSI, GB, JIS, GOST, BSW
Grade: 12.9
Surface Finish: Zinc, Nickel, Black Oxide, Dacromet, Custom
Size: M2-M16
Length: 10-180mm (3/8- 7)
Thread Type: Metric, Unc, Unf, Coarse, Fine, Custom Thread

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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
Connection	Common Bolt
Model NO.	nut
Head Style	Square
Standard	DIN, ANSI, GB, JIS, GOST, BSW
Grade	12.9
Surface Finish	Zinc, Nickel, Black Oxide, Dacromet, Custom
Size	M2-M16
MOQ	20000 PCS
Length	10-180mm (3/8- 7)
Thread Type	Metric, Unc, Unf, Coarse, Fine, Custom Thread
Packing	Plastic Bag, Carton, Pallet, Custom Packing
Nut Type	Hex, Flange, Lock, Knurled, Insert, Custom
Inspection	Dimension, Hardness, Torque, Tensile, Salt Spray
Certification	ISO9001, ISO14001, IATF16949
Manufacturing Process	Cold Heading, CNC Machining, Turning, Stamping
Custom by	Drawing, Sample, OEM, ODM
Advantage	OEM ODM Customized Service Provided
Tolerance	Custom Tolerance
Transport Package	Cartons+Plastic Bags
Specification	M2-M16
Origin	China
HS Code	6307900090
Production Capacity	1000000pieces/Day
Package Size	28.50cm * 20.00cm * 12.00cm
Package Gross Weight	5.000kg
Carbon Steel	1008 / 1022 / 10B21 / SCM435;
Stainless Steel	302 / 304 / 316 / 410;
Brass	H65 / C1100;
Main products	screws, bolts, nuts, rivets, non-standard studs, turning parts and precision CNC machining parts.
Materials	carbon steel, alloy steel, stainless steel, aluminum, brass, copper — or per your requirement.
Urgent cases	contact us directly by phone or email.
Payment	30% deposit via T/T, PayPal, Western Union or MoneyGram; balance upon shipping documents.
Incoterms	EXW, FOB, CIF, CFR, DDU, DDP — DDP/DDU includes customs clearance and door-to-door delivery.
Certifications	ISO 9001, ISO 14001, IATF 16949; REACH, RoHS, SGS reports on request.
Category	Heat-Set, Knurled & Molded-In Inserts

Technical parameters

Product Name	nuts
Thread size	M2–M16 or customized
Standard	ISO, GB, DIN, BS, ANSI, JIS, Nonstandard
Grade	4.8 / 6.8 / 8.8 / 10.9 / 12.9
Material	Carbon Steel: 1008 / 1022 / 10B21 / SCM435; Stainless Steel: 302 / 304 / 316 / 410; Brass: H65 / C1100; Aluminum; Alloy Steel, etc.
Surface Treatment	Zinc Plated (Clear/Blue/Yellow/Black), Zinc-Nickel, Nickel Plated, Chrome Plated, Black Oxide, Dacromet, Anodized (Al), Phosphate, Customized per Request; Salt Spray Test Available
Advantage	OEM / ODM / customized service provided
Quality control	ISO standard, 100% whole range inspection through the production
Certificate	ISO9001, IATF16949, ISO14001, ROHS, REACH
After-sales Service	We will follow up every customer and solve all your problems satisfied after sales

Description

M3 M8 Good Price Stainless Steel Square Knurled Internal Thread Insert Flat Hex Head Barrel Nut is part of our heat-set, knurled & molded-in inserts range (Threaded Inserts & Clinch Fasteners).

Key details

Standard: DIN, ANSI, GB, JIS, GOST, BSW
Material: Stainless Steel
Grade: 12.9
Size: M2-M16
Length: 10-180mm (3/8- 7)
Head Style: Square
Connection: Common Bolt
Certification: ISO9001, ISO14001, IATF16949

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 2,000 pieces at US$0.024 – 0.084 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 M3 M8 Good Price Stainless Steel Square Knurled Internal Thread Insert Flat Hex Head Barrel Nut?

The listed minimum order is 2,000 pieces, at US$0.024 – 0.084 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$0.084 for 2,000–4,999 pieces; US$0.048 for 5,000–9,999 pieces; US$0.024 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 M3 M8 Good Price Stainless Steel Square Knurled Internal Thread Insert Flat Hex Head Barrel Nut?

Standard: DIN, ANSI, GB, JIS, GOST, BSW; Material: Stainless Steel; Grade: 12.9; Size: M2-M16; Length: 10-180mm (3/8- 7); Head Style: Square. 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 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 heat-set, knurled & molded-in inserts are available?

The Heat-Set, Knurled & Molded-In Inserts category lists 395 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/

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 – 0.084MOQ 2,000 piecesGet a quote WA