---
product_id: 58139536
title: "1 CORELINE Adjustable Jack Post 4T - 12” - 15”"
brand: "coreline"
price: "Rp999851"
currency: IDR
in_stock: false
reviews_count: 8
url: https://www.desertcart.id/products/58139536-1-coreline-adjustable-jack-post-4t-12-15
store_origin: ID
region: Indonesia
---

# Adjustable height 12"–15" 15 gauge heavy-duty steel 18,000 lb load capacity 1 CORELINE Adjustable Jack Post 4T - 12” - 15”

**Brand:** coreline
**Price:** Rp999851
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Elevate your space with strength and style—don’t let sagging floors hold you back!

## Quick Answers

- **What is this?** 1 CORELINE Adjustable Jack Post 4T - 12” - 15” by coreline
- **How much does it cost?** Rp999851 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/58139536-1-coreline-adjustable-jack-post-4t-12-15)

## Best For

- coreline enthusiasts

## Why This Product

- Trusted coreline brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Proudly Made in the USA:** Quality you can count on, manufactured domestically with strict standards.
- • **Precision Adjustable Support:** Easily fine-tune height from 12" to 15" with a 3/4 inch wrench for perfect fit every time.
- • **Engineered for Maximum Strength:** Independently tested to safely hold up to 18,000 pounds—trust it to stabilize your space.
- • **Versatile Use for Every Project:** Ideal for crawl spaces, attics, decks, stairwells, and even heavy furniture support.
- • **Built to Last with Heavy-Duty Steel:** Crafted from 15 gauge powder-coated steel for unbeatable rust resistance and durability.

## Overview

The CORELINE Adjustable Jack Post 4T offers a robust 18,000 lb load capacity with a precision adjustable height range of 12 to 15 inches. Constructed from durable 15 gauge powder-coated steel, it resists rust and ensures long-lasting support for residential projects like crawl spaces, attics, decks, and stairwells. Manufactured in the USA, this jack post combines heavy-duty strength with easy adjustability, making it an essential tool for professionals and DIYers aiming to stabilize and elevate their spaces with confidence.

## Description

12” to 15”, 15 gauge adjustable Jack post, Load Capacity 18,000 (lb) , additional support for crawl spaces, attic, staircase or decks, adjusts with 3/4 inch wrench, O.D. Gauge & tube dim 2.5 inch x 15 gauge x 9", screw size 1 inch x 7", 5" thread support, collar size 2.5 inch x 1/2", 13 gauge plate size 4 inch x 4", heavy plates suited for wood & steel, deep dish self-centering plates. This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in United States. Adjustable Jack Post can be used for: Supporting water beds Attic beams Deck support / Hot tub support Secondary support Stairwell support Corrects sagging floors, supports basement beams, takes weight off large furniture or appliances Other temporary support

## Features

- Standard jacks are available in a wide variety of heights from 12” to 8’4” and are constructed of 14 gauge or 15 gauge (heavy duty) steel.
- All jack tubing is powder coated to provide a rust resistant finish.
- Safe load capacities at minimum and maximum heights have been computed by an independent testing lab and are clearly marked on the box and instructions.
- All adjustable jacks are constructed from materials that are made in the USA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Load Capacity | 18000 pound |
| Brand | CORELINE |
| Color | Red |
| Item dimensions L x W x H | 11 x 6.5 x 3.5 inches |
| Manufacturer | CORELINE MFG |
| UPC | 811865010055 |
| Part Number | 4T |
| Item Weight | 5 pounds |
| Product Dimensions | 11 x 6.5 x 3.5 inches |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Usage | Residential |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Load Capacity:** 18000 pound
- **Brand:** CORELINE
- **Color:** Red
- **Item dimensions L x W x H:** 11 x 6.5 x 3.5 inches
- **Manufacturer:** CORELINE MFG

## Images

![1 CORELINE Adjustable Jack Post 4T - 12” - 15” - Image 1](https://m.media-amazon.com/images/I/61cDSm5TcRL.jpg)
![1 CORELINE Adjustable Jack Post 4T - 12” - 15” - Image 2](https://m.media-amazon.com/images/I/61cDSm5TcRL.jpg)
![1 CORELINE Adjustable Jack Post 4T - 12” - 15” - Image 3](https://m.media-amazon.com/images/I/810gsvlypJL.jpg)
![1 CORELINE Adjustable Jack Post 4T - 12” - 15” - Image 4](https://m.media-amazon.com/images/I/91wbOszUcrL.jpg)
![1 CORELINE Adjustable Jack Post 4T - 12” - 15” - Image 5](https://m.media-amazon.com/images/I/61ouXvP8jTL.jpg)

## Questions & Answers

**Q: what is the tubing diameter?**
A: 2”

**Q: How many jacks would I need per slideout?**
A: I used these Jacks to support sagging floor joist in a house. Not something to use on a camper.

**Q: what diameter bar will i need to adjust the jack?**
A: I used a an open end wrench. This one does not a hole for a bar to adjust it. Rather it is squared off near the top of the shaft.

**Q: Are these already welded or come in pieces like Akron and tiger?**
A: These come in pieces. 
We will be offering some in the very near future that will be welded.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    It's a stubby basement jack.
  

*by R***V on Reviewed in the United States on February 17, 2020*

Couldn't find these at the local big box stores.  Once again Amazon to the rescue.  Not really much to say here other than it is just like a regular basement jack just really short.  Did what I needed it too!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    These posts are very high quality and simple to use ...
  

*by D***D on Reviewed in the United States on April 16, 2018*

These posts are very high quality and simple to use. I bought a 60 year old home on a crawl space and have been using many of these to shore up the structure from beneath. They work very well.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    They are perfect for my needs.
  

*by J***C on Reviewed in the United States on July 2, 2019*

The good, they're strong enough for my 100 yo house foundation that was sagging.  I bought these a couple of years ago to prop-up a sagging room floor, and they're still working as advertised.  I foresee no problems with these doing the same under a different room's floor.

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---

*Product available on Desertcart Indonesia*
*Store origin: ID*
*Last updated: 2026-01-25*