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Three-Stage Sealing Screw Designed for Superior Leak Protection

Updated 2026-11-04 · Markdown version

Model no. 8*300

US$0.14 / piece

MOQ 1,000 pieces · Final price confirmed in your quote

Material: Metal
Package Size: 30.00cm * 30.00cm * 15.00cm
Surface Treatment: Yes

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.	8*300
Technics	Forged
Material	Metal
Type	Fasteners
Use1	Basement Side Wall
Use2	The Exterior Wall of The Underground Garage
Use3	Civil Defense Projects, Underground Pipe Galleries
Use4	Pond, Water Tank, Sewage Treatment Pool
Use5	The Key Point Is When Pouring The Waterproof Concr
Transport Package	in Bundle
Origin	China, Handan
HS Code	7318150000
Production Capacity	150 Tons Per Month
Package Size	30.00cm * 30.00cm * 15.00cm
Package Gross Weight	25.000kg
Customization	Available
Application	Decorations
Surface Treatment	Yes
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Structure	Length = wall thickness. A water-stop plate (round/rectangular) is welded in the middle. Both ends have connection threads.
Function	It bears the water-stop function and the connection with the wall. After pouring, it permanently remains in the wall and blocks the water infiltration channel.
Category	Other Machine & Custom Screws

Technical parameters

Inner rod (water-stop section, permanently pre-installed)	Material: Q235/Q355 high-strength carbon steel, customizable stainless steel.Structure: Length = wall thickness. A water-stop plate (round/rectangular) is welded in the middle. Both ends have connection threads.Function: It bears the water-stop function and the connection with the wall. After pouring, it permanently remains in the wall and blocks the water infiltration channel.
Outer rod (rotating section, detachable)	Material: The same as the inner rod, full-threaded through wire, specifications M12/M14/M16. Dimensions: Length 150–300mm, commonly 220–240mm. Function: Fixed template, reusable for 500+ times after demolding, significantly reduces cost.
Cone-shaped nuts (connection + shaping)	Material: Engineering plastic / Hard rubber. The inner rod and outer rod are connected by an internal thread. Function: Quick disassembly and assembly. After removing the mold, a regular conical hole (about 30mm) is left. The sealing is simple and the wall surface is smooth.
Complementary attachments	Mountain-shaped washer, hexagonal nut, gasket (for fixing the template).

Description

Three-Stage Sealing Screw Designed for Superior Leak Protection is part of our other machine & custom screws range (Screws).

Key details

Type: Fasteners
Material: Metal
Surface Treatment: Yes
Application: Decorations
Technics: Forged
Use1: Basement Side Wall
Use2: The Exterior Wall of The Underground Garage
Use3: Civil Defense Projects, Underground Pipe Galleries

Available configurations include material, package size and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 1,000 pieces at US$0.14 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 Three-Stage Sealing Screw Designed for Superior Leak Protection?

The listed minimum order is 1,000 pieces, at US$0.14 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

What are the main specifications of Three-Stage Sealing Screw Designed for Superior Leak Protection?

Type: Fasteners; Material: Metal; Surface Treatment: Yes; Application: Decorations; Technics: Forged; Use1: Basement Side Wall. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, package size and surface treatment. 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 other machine & custom screws are available?

The Other Machine & Custom Screws category lists 14,058 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/other-machine-custom-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

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