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Threaded Inserts & Clinch Fasteners › Thread Repair & Solid Threaded Inserts

Heat-Resistant Spark Plug Threaded Inserts for Industrial Engines

Updated 2026-11-04 · Markdown version

Model no. M8

US$0.72100–999 pieces

US$0.481,000–9,999 pieces

US$0.1210,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Surface Finishing: Standard
Customized: Customized
Size: as Design
Package Size: 10.00cm * 10.00cm * 10.00cm
Material: Carbon Steel

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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

Model NO.	M8
Usage	Building, Machinery, Medical
Rotation Direction	Standard
Surface Finishing	Standard
Certification	ISO, RoHS
Customized	Customized
MOQ	100 PCS
Name	Spark Plug Thread Sleeve
Size	as Design
Quality	100% Tested
Transport Package	Carton Box
Specification	M12 x 1.0
Origin	China
HS Code	7318190000
Production Capacity	50000pieces
Package Size	10.00cm * 10.00cm * 10.00cm
Package Gross Weight	1.000kg
Customization	Available
Material	Carbon Steel
Type	Common
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Accepted Delivery Terms	FOB,EXW,Express Delivery;
Accepted Payment Currency	USD;
Accepted Payment Type	T/T,L/C,MoneyGram,Western Union;
Language Spoken	English,Chinese
Category	Thread Repair & Solid Threaded Inserts

Technical parameters

Name	Spark plug insert	specification	M121.25 M141.25
material	Stainless steel, nickel-plated steel	Application	Repair fasteners for spark plug threaded holes in engine cylinder heads.

Description

Heat-Resistant Spark Plug Threaded Inserts for Industrial Engines is part of our thread repair & solid threaded inserts range (Threaded Inserts & Clinch Fasteners).

Key details

Type: Common
Material: Carbon Steel
Size: as Design
Certification: ISO, RoHS
Usage: Building, Machinery, Medical
Rotation Direction: Standard
Surface Finishing: Standard
Name: Spark Plug Thread Sleeve

Available configurations include surface finishing, customized, size, package size and material. 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$0.12 – 0.72 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 Heat-Resistant Spark Plug Threaded Inserts for Industrial Engines?

The listed minimum order is 100 pieces, at US$0.12 – 0.72 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$0.72 for 100–999 pieces; US$0.48 for 1,000–9,999 pieces; US$0.12 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 Heat-Resistant Spark Plug Threaded Inserts for Industrial Engines?

Type: Common; Material: Carbon Steel; Size: as Design; Certification: ISO, RoHS; Usage: Building, Machinery, Medical; Rotation Direction: Standard. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include surface finishing, customized, size, package size and material. 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 thread repair & solid threaded inserts are available?

The Thread Repair & Solid Threaded Inserts category lists 961 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/thread-repair-solid-threaded-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

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Request a quote for this product

US$0.12 – 0.72MOQ 100 piecesGet a quote WA