Standard & made-to-drawing parts
Checked before shipping
Air, sea & express delivery

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

Stainless Steel Key Locking Threaded Inserts with Threads Unc 1 / 4-20

Updated 2026-11-04 · Markdown version

Model no. M1.2-M100

US$0.181–9 pieces

US$0.1110–99 pieces

US$0.096100–999 pieces

US$0.061,000+ pieces

MOQ 1 piece · Final price confirmed in your quote

Material: Stainless Steel
Surface Finishing: Zinc Plated
Customized: Customized
Precision Grade: 6h
Length: Customizable
Temperature Tolerance: 932fahrenheit-1382fahrenheit

Get a quote WhatsApp

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
Type	Common
Model NO.	M1.2-M100
Usage	Building, Machinery, Medical, Rocket, Shipping, Chemical
Rotation Direction	Right Rotation
Surface Finishing	Zinc Plated
Certification	ISO, RoHS
Customized	Customized
Precision Grade	6h
Length	Customizable
Installation Handle	Have
Temperature Tolerance	932fahrenheit-1382fahrenheit
Transport Package	PE Bags+Cartons+Pallets
Specification	Package 30cm x 26cm x 18cm
Origin	China
HS Code	7318190000
Production Capacity	3000000 Pieces/Day
Category	Thread Repair & Solid Threaded Inserts

Technical parameters

	Number of coil turns of the thread insert
Specification	1D	1.5D	2D	2.5D	3D	Outer diameter before installation	Drill bit diameter
St1.6×0.35	3.1	4.5	6.2			2.1~2.3	1.6
St2×0.4	3.2	5.3	7.4	9.5	11.6	2.5~2.8	2.1
St2.5×0.45	3.6	5.9	8.2	10.5	12.8	3.2~3.5	2.6
St3×0.5	4.2	6.8	9.4	12	14.6	3.7~4.0	3.1
St4×0.7	4	6.6	9.1	11.7	14.2	5.0~5.3	4.2
St5×0.8	4.4	7.1	9.9	12.6	15.3	6.3~6.6	5.2
St6×1.0	4.3	6.9	9.6	12.2	14.9	7.5~7.9	6.3
St8×1.25	4.8	7.7	10.6	13.5	16.5	9.8~10.1	8.3
St10×1.5	5	8.1	11.2	14.2	17.3	12~12.5	10.4
St12×1.75	5.3	8.4	11.6	14.8	18	14.3~14.8	12.4
St14×2	5.4	8.7	11.9	15.2	18.40	16.7~17.2	14.5
St16×2	6.3	10.00	13.7	17.5	21.2	18.8~19.4	16.5

Description

Stainless Steel Key Locking Threaded Inserts with Threads Unc 1 / 4-20 is part of our thread repair & solid threaded inserts range (Threaded Inserts & Clinch Fasteners).

Key details

Type: Common
Material: Stainless Steel
Length: Customizable
Certification: ISO, RoHS
Usage: Building, Machinery, Medical, Rocket, Shipping, Chemical
Rotation Direction: Right Rotation
Surface Finishing: Zinc Plated
Precision Grade: 6h

Available configurations include material, surface finishing, customized, precision grade and length. 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$0.06 – 0.18 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 Stainless Steel Key Locking Threaded Inserts with Threads Unc 1 / 4-20?

The listed minimum order is 1 piece, at US$0.06 – 0.18 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$0.18 for 1–9 pieces; US$0.11 for 10–99 pieces; US$0.096 for 100–999 pieces; US$0.06 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 Stainless Steel Key Locking Threaded Inserts with Threads Unc 1 / 4-20?

Type: Common; Material: Stainless Steel; Length: Customizable; Certification: ISO, RoHS; Usage: Building, Machinery, Medical, Rocket, Shipping, Chemical; Rotation Direction: Right Rotation. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, surface finishing, customized, precision grade and length. 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

More about us → · Request a sample or custom quote →

Request a quote for this product

US$0.06 – 0.18MOQ 1 pieceGet a quote WA