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Screws › Countersunk & Flat-Head Machine Screws

95% Alumina Ceramic Screw Stud and Screw Nut

Updated 2026-11-04 · Markdown version

US$3.601–24 pieces

US$3.1225–99 pieces

US$2.40100+ pieces

MOQ 1 piece · Final price confirmed in your quote

Head Style: Round
Grade: 9.8
Tensile Strength: 2800 Pounds
Size: M40*121*14
Flexural Strength: Mpa

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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

Connection	Common Bolt
Head Style	Round
Grade	9.8
Shape	Cylinder
Creepage Distance	14-53 Inch
Radio-Interferenc Voltage Test Voltgae	15-44 Kv
Tensile Strength	2800 Pounds
Size	M4012114
Transport Package	Plywood Case
Specification	RoHS
Origin	Shanghai
Production Capacity	50000 PCS/Year
Customization	Available
Type	Countersunk Head
Groove	Special Shape
Desnsity	g/cm3
Water Absorption	%
Refractoriness	ºC
Flexural Strength	Mpa
Category	Countersunk & Flat-Head Machine Screws

Technical parameters

Product Properties
Material	85Al203	90Al203	95Al203	99Al203
Al203	85%	90%	95%	99.3%
Fe2O3	≤0.1	≤0.5	≤0.5	≤0.3
Desnsity:g/cm3	3.4	3.5	3.6	3.85
Vickers Hardness	≥8.6	≥8.8	9	9
Water Absorption:%	≤0.2	≤0.1	≤0.085	≤0.01
Refractoriness:ºC	1580ºC	1600ºC	1650ºC	1800ºC
Flexural Strength:Mpa	180	200	240	280
Wear Rate( at room temperatureerosion100 grinding)%	≤3	≤2.5	≤1	≤0.5

Description

95% Alumina Ceramic Screw Stud and Screw Nut is part of our countersunk & flat-head machine screws range (Screws).

Key details

Type: Countersunk Head
Grade: 9.8
Size: M40*121*14
Head Style: Round
Groove: Special Shape
Connection: Common Bolt
Shape: Cylinder
Creepage Distance: 14-53 Inch

Available configurations include head style, grade, tensile strength, size and flexural strength. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 1 piece at US$2.40 – 3.60 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 95% Alumina Ceramic Screw Stud and Screw Nut?

The listed minimum order is 1 piece, at US$2.40 – 3.60 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$3.60 for 1–24 pieces; US$3.12 for 25–99 pieces; US$2.40 for 100+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of 95% Alumina Ceramic Screw Stud and Screw Nut?

Type: Countersunk Head; Grade: 9.8; Size: M40*121*14; Head Style: Round; Groove: Special Shape; 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 head style, grade, tensile strength, size and flexural strength. 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$2.40 – 3.60MOQ 1 pieceGet a quote WA