2\" x 4\" Rectangular Tube Plug 8–12 GA Steel Fabrication Frame Insert For Sale

2\"x 4” Rectangle End CapTubePipe InsertsRectangularTube PlugsBlackmatte clean finish HDPE
KeySpecifications:
TopSize:Â2” x 4\" (51mm x Square Tube Dimensions:(1.62to 1.75) x (3.62 to 3.75 id)CompatibleThickness Range:Â8-12 gauge(Fitstubing with wall thickness of .164-.109)SizeBased on Outside Dimensions:Thesecaps are designed based on the outside dimensions of rectangle tubes.Theplug insert end is about 1/8-1/4\" smaller to fit inside dimensions,whilethe top dimension of the plug matches the OD dimension of the tube.Whetheryou\'re working on furniture, shelving, rack systems, or any other project thatutilizes square tubing, these plugs are a must-have.Pleasemeasure your tube outside dimensions fo

Alltrade Supply Inc

Quality products since 2014

• HDPE Tubing Caps & Plugs

2\" x 4” Rectangle Tube Plugs Rectangular Tube Cap Tubing Plugs

2\" x 4\" Rectangular Tube Plug – 8–12 GA Steel Fit

Each quantity option contains the same part in a different pack size.
Choose what fits your job.
Choose a larger pack to keep this common item on hand for future service work.

Description

Heavy-duty inserts for 2\" x 4\" rectangular steel tubing.
Fits 8–12 gauge wall thickness.

Creates a clean, flush finish while sealing exposed tube ends.
Helps protect trailer frames, rack systems, and structural tubing
from moisture, debris, and impact damage.

Ribbed compression fins provide a secure press-in fit.
No hardware or fasteners required.

Common in trailer fabrication, rack builds, equipment frames,
and general steel construction work.

Specifications

Tube size: 2\" x 4\" rectangular steel tubing
Gauge compatibility: 8–12 GA steel
Fit type: Press-in ribbed insert
Head style: Flat flush face
Material: Black heavy-duty plastic
Function: Tube sealing and edge protection
Use environment: Indoor / outdoor industrial

Key Uses

Trailer frame rails
Rack systems
Fabrication shop builds
Structural steel projects
Equipment frames

Package Options

• Multiple pack sizes available.
• Please use the drop-down box for needed quantity.
• Second quantity option offers the best balance of price and quantity.

Service

Ships from California, USA warehouse
Same-day handling on most weekday orders
Tracking uploaded quickly after shipment
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99.8 percent positive response
Free shipping with tracking included

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We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

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These 2\" x 4\" rectangular tube plugs are designed for sealing and finishing heavy steel tubing in trailer frames, rack systems, and structural fabrication. Built to fit 8–12 gauge rectangular tubing, they provide a clean, professional flush appearance on exposed steel ends.

The ribbed compression design creates a tight press-in fit that helps block moisture, debris, and corrosion from entering open tube cavities. The flat flange covers sharp steel edges, improving safety while protecting the tubing interior.

Commonly used in trailer repair, rack fabrication, and structural shop builds where durability and fit matter. Designed for MRO teams and technicians working in inch and metric systems.