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

High-Performance Factory Unjc/Unjf Key Locking Thread Inserts M18 M20

Updated 2026-11-04 · Markdown version

Model no. EA-M18

US$0.24100–999 pieces

US$0.221,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Surface Finishing: Nickel Plated
Customized: Customized
Material: Stainless 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.	EA-M18
Usage	Building, Machinery, Medical, Rocket, Shipping, Chemical, High Speed Rail
Rotation Direction	Right Rotation
Surface Finishing	Nickel Plated
Certification	ISO, RoHS
Customized	Customized
Other Name	Keen Locking Thread Insert
Delivery Time	Within 3-7 Working Days
Advantage	Durable; Rust Anti; Easy to Use
Sample	Available
Specificate	Metric, Inch
Warranty	6 Months
Certificate	ISO9001:2015
Transport Package	Plastic Bag+Carton
Specification	100pcs/bag
Origin	China
HS Code	7318190090
Production Capacity	500000PCS/Week
Customization	Available
Material	Stainless Steel
Type	Common
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Heavy Duty Key Inserts	Feature a thick, heavy-duty thread wall and are suitable for most applications.
Thinwall Key Inserts	Have a smaller OD thread size than standard and heavy-duty keenserts. These parts are ideal for use in tight spaces where less pull-out strength is acceptable.
Solid Key Inserts	These key inserts have a solid base and are ideal for relocating a drilled or tapped hole.
Unit	mm
Heavy Duty Type Specification Parameters (Table 3) Unit	mm
Package	Usually finished products will be put into plastic bags and outer with carton cases.
https	//eliteaviation.en.made-in-china.com
Category	Thread Repair & Solid Threaded Inserts

Technical parameters

Thin Wall Type Specification Parameters (Table 3) Unit: mm
Key locking thread insert	Installation	Removal
Internal thread 6H	External thread 6g	Length	Drill bit size	Countersink diameter 0.250	Tap thread	Drill size	Drill depth
6H	Minimum depth
M2×0.4	M4×0.7	3	3.4	4.4	M4×0.7	4	2.8
M2.5×0.45	M4.5×0.75	3.8	3.9	4.6	M4.5×0.75	5	3	2
M3×0.5	M5×0.8	4.25	4.4	5.1	M5×0.8	5.5	3.5	2.25
M4×0.7	M6×0.75	5.25	5.5	6.1	M6×0.75	6.5	4.6	2.5
M5×0.8	M8×1.25	8	6.9	8.25	M8×1.25	9.5	5.5	4
M6×1	M10×1.25	10	8.8	10.25	M10×1.25	11.5	7.5	4.75
M8×1.25	M12×1.25	12	10.8	12.25	M12×1.25	13.5	9.5
M8×1
M10×1.5	M14×1.5	14	12.8	14.25	M14×1.5	15.5	11.5
M10×1.25
M12×1.75	M16×1.5	16	14.75	16.25	M16×1.5	17.5	13.5
M12×1.25

Heavy Duty Type Specification Parameters (Table 3) Unit: mm
Key locking thread insert	Installation	Removal
Internal thread 6H	External thread 6g	Length	Drill bit size	Countersink diameter 0.250	Tap thread	Drill size	Drill depth
6H	Minimum depth
M4×0.7	M8×1.25	8	6.9	8.25	M 8×1.25	9.5	5.5	4
M5×0.8	M10×1.25	10	8.8	10.25	M10×1.25	12.5	7.5	4.75
M6×1	M12×1.25	12	10.8	12.25	M12×1.25	14.5	9.5
M8×1.25	M14×1.5	14	12.8	14.25	M14×1.5	16.5	11.5
M8×1
M10×1.5	M16×1.5	16	14.75	16.25	M16×1.5	18.5	13.5	4.75
M10×1.25
M12×1.75	M18×1.5	18	16.75	18.25	M18×1.5	20.5	15.5
M12×1.25
M14×2	M20×1.5	20	18.75	20.25	M20×1.5	22.5	17.5
M14×1.5
M16×2	M22×1.5	22	20.5	22.25	M22×1.5	24.5	17.75	6.35
M16×1.5
M18×1.5	M24×1.5	24	22.5	24.25	M24×1.5	26.5	19.75
M20×2.5	M30×2.0	30	28	30.25	M30×2.0	34.5	25.75
M20×1.5
M22×1.5	M32×2.0	32	30	32.25	M32×2.0	36.5	27.75
M24×3.0	M33×2.0	33	31	33.25	M33×2.0	37.5	28.75
M24×2

Description

High-Performance Factory Unjc/Unjf Key Locking Thread Inserts M18 M20 is part of our thread repair & solid threaded inserts range (Threaded Inserts & Clinch Fasteners).

Key details

Type: Common
Material: Stainless Steel
Certification: ISO, RoHS
Rotation Direction: Right Rotation
Surface Finishing: Nickel Plated
Other Name: Keen Locking Thread Insert
Advantage: Durable; Rust Anti; Easy to Use
Specificate: Metric, Inch

Available configurations include surface finishing, customized 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$0.22 – 0.24 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 High-Performance Factory Unjc/Unjf Key Locking Thread Inserts M18 M20?

The listed minimum order is 100 pieces, at US$0.22 – 0.24 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$0.24 for 100–999 pieces; US$0.22 for 1,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of High-Performance Factory Unjc/Unjf Key Locking Thread Inserts M18 M20?

Type: Common; Material: Stainless Steel; Certification: ISO, RoHS; Rotation Direction: Right Rotation; Surface Finishing: Nickel Plated; Other Name: Keen Locking Thread Insert. 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 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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US$0.22 – 0.24MOQ 100 piecesGet a quote WA