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Heavy Duty House Leveling Jacks - 4.5-6.5inch Height, Fits 4x4 Inch Posts

$212.29

  • PERFECT FIT FOR 4×4 INCH SQUARE POSTS: Designed for standard 4x4 inch square wooden posts. With 4.01IN×4.01IN internal dimension, it accommodates wood expansion from thermal changes and moisture. Unlike other brands house jacks for lifting and leveling (external 4IN×4IN design causing secondary wood processing), our jack post saves time and labor costs.
  • VERSATILE APPLICATION SCENARIOS: Ideal for crawlspace support, attic floor reinforcement, house beam stabilization, patio deck support, large equipment leveling, and stair platform reinforcement. Provides reliable screw jack stands for structural reinforcement needs in residential and commercial applications.
  • USER-FRIENDLY DESIGN FOR VARIOUS USERS: Jack support pole perfect for DIY enthusiasts, contractors, and renovation workers. Easy to use - install nail at bottom to prevent rotation.Adjust joist jack height by rotating handle even after base/top installation for unmatched convenience.
  • CONVENIENT 4.5-6.5INCH HEIGHT ADJUSTMENT: Offers jacks for house 4.7-6.5 inch adjustable height with easy threaded adjustment. Rotate the handle to adjust lally column precisely after fixing base and top. Note: Height refers to post top (not 4x4 base) - cut wooden posts considering 4x4 frame.
  • HIGH-QUALITY ASTM A570 GR.33 STEEL CONSTRUCTION: House lifting jacks crafted from premium ASTM A570 Gr.33 steel for excellent strength and durability. Prevents bending and deformation under heavy loads, addressing flimsy construction in some products.House floor jacks support tube diameter 1.5 inches * wall thickness 0.1 inches.
  • RUST-RESISTANT PROTECTIVE COATING:: Floor jacks features professional rust-resistant spray coating for long-lasting corrosion protection. Prevents paint chipping and rusting during transportation and use, solving poor paint quality issues in other products.The foundation jack base plate has outer dimensions of 5 inches * 5 inches, and the plate thickness is 0.16 inches.
  • EXCEPTIONAL 10000LB WEIGHT CAPACITY: Floor jacks for houses boasts 10000lb load-bearing capacity for heavy structural components. Rigorously tested to withstand heavy loads without bending or deformation, solving insufficient load capacity issues in other products.
  • STRONG AWS E8018 WELDING REINFORCED DESIGN: 12in jack post utilizes AWS E8018 welding and argon arc process for strong joints. The base can be secured with nails to prevent deformation and sliding on uneven surfaces. Includes adjustable deck support brackets and a limit observation window to ensure safe operation
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Size:
4.35-6.55 inches
Color:
Blue
Manufacturer:
QARCMQ
Part Number:
KNSB591
Material Type:
Steel
Product Dimensions:
5.94 x 8.54 x 9.29 inches; 9.11 pounds
Isin:
IT51WKW7NNSP

$212.29

In Stock

, Fulfilled by IBSPOT • Ships from US

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Heavy Duty House Leveling Jacks - 4.5-6.5inch Height, Fits 4x4 Inch Posts

Heavy Duty House Leveling Jacks - 4.5-6.5inch Height, Fits 4x4 Inch Posts

$212.29

  • PERFECT FIT FOR 4×4 INCH SQUARE POSTS: Designed for standard 4x4 inch square wooden posts. With 4.01IN×4.01IN internal dimension, it accommodates wood expansion from thermal changes and moisture. Unlike other brands house jacks for lifting and leveling (external 4IN×4IN design causing secondary wood processing), our jack post saves time and labor costs.
  • VERSATILE APPLICATION SCENARIOS: Ideal for crawlspace support, attic floor reinforcement, house beam stabilization, patio deck support, large equipment leveling, and stair platform reinforcement. Provides reliable screw jack stands for structural reinforcement needs in residential and commercial applications.
  • USER-FRIENDLY DESIGN FOR VARIOUS USERS: Jack support pole perfect for DIY enthusiasts, contractors, and renovation workers. Easy to use - install nail at bottom to prevent rotation.Adjust joist jack height by rotating handle even after base/top installation for unmatched convenience.
  • CONVENIENT 4.5-6.5INCH HEIGHT ADJUSTMENT: Offers jacks for house 4.7-6.5 inch adjustable height with easy threaded adjustment. Rotate the handle to adjust lally column precisely after fixing base and top. Note: Height refers to post top (not 4x4 base) - cut wooden posts considering 4x4 frame.
  • HIGH-QUALITY ASTM A570 GR.33 STEEL CONSTRUCTION: House lifting jacks crafted from premium ASTM A570 Gr.33 steel for excellent strength and durability. Prevents bending and deformation under heavy loads, addressing flimsy construction in some products.House floor jacks support tube diameter 1.5 inches * wall thickness 0.1 inches.
  • RUST-RESISTANT PROTECTIVE COATING:: Floor jacks features professional rust-resistant spray coating for long-lasting corrosion protection. Prevents paint chipping and rusting during transportation and use, solving poor paint quality issues in other products.The foundation jack base plate has outer dimensions of 5 inches * 5 inches, and the plate thickness is 0.16 inches.
  • EXCEPTIONAL 10000LB WEIGHT CAPACITY: Floor jacks for houses boasts 10000lb load-bearing capacity for heavy structural components. Rigorously tested to withstand heavy loads without bending or deformation, solving insufficient load capacity issues in other products.
  • STRONG AWS E8018 WELDING REINFORCED DESIGN: 12in jack post utilizes AWS E8018 welding and argon arc process for strong joints. The base can be secured with nails to prevent deformation and sliding on uneven surfaces. Includes adjustable deck support brackets and a limit observation window to ensure safe operation
  • adjustable foundation support jack,screw jacks for house leveling,permanent house leveling jacks,heavy duty floor leveling jacks,adjustable crawlspace support jack,basement support jack post,adjustable screw jack post,heavy duty house leveling jacks,foundation support jack post,professional house jack system,steel floor leveling jacks,
  • adjustable leveling support jack,multi-purpose house jacks,strong foundation jack post,precision screw leveling jacks,heavy duty adjustable jack,house leveling jacksadjustable jack post,floor jack for house,screw jacks for leveling,foundation jack for leveling,house support jacks,adjustable house jacks,heavy duty jack post,screw jack for foundation,leveling jacks for floor,1 ft adjustable jack post,12 inch adjustable jack post,12 inch adjustable jack post permanent,12 jack post,16 to 24 inch house jack,18 inch jack post,2 foot permanent foundation jack post,2 foot screw jacks,20000 lb house jacks,24 inch screw jack,2x4 house floor jack,3 foot jack post,

Size:
4.35-6.55 inches
Color:
Blue
Manufacturer:
QARCMQ
Part Number:
KNSB591
Material Type:
Steel
Product Dimensions:
5.94 x 8.54 x 9.29 inches; 9.11 pounds
Isin:
IT51WKW7NNSP

Our Heavy Duty Screw Jack Post is ideal for structural support and leveling. Made from ASTM A570 Gr.33 steel with AWS E8018 welding, it offers exceptional strength and 10000lb capacity. The 4.01IN×4.01IN internal dimension fits standard 4x4 inch posts, eliminating secondary wood processing. With 4.7-6.5 inch adjustable height and rust-resistant coating, it's suitable for crawlspaces, attics, decks, etc. Reinforced base with ribs prevents sliding, while unique design allows height adjustment after full installation. Comes in secure carton packaging (10.92lb single weight) with all components included. Suitable for DIY users and professionals, providing reliable, long-lasting structural support. crawl space screw jacks crawlspace support jack deck jacks floor house jack home leveling jacks house floor jack 20tons house floor leveling jacks house leveling screw jacks crawlspace jack 17"-24" deck jacks for lifting and leveling floor jack joist floor jack post floor jack posts 17" - 31" 2-4” house floor jack bottle jack for house gatos de rosca house floor jack supports house jacks for sale precision screw leveling jacks professional house jack system screw jack for foundation house jacks for leveling permanent jack posts for basement

Processing Time

  • We process and ship orders Monday through Friday, excluding holidays.
  • Most orders are processed within 1–3 business days, depending on product availability.
  • Processing time does not include delivery time, which varies based on your location and the product’s shipping origin.

Shipping Coverage

We currently ship to addresses within the United States only.

Products may ship from:

  • Our U.S. warehouses, or
  • Our international fulfillment centers (including Korea, Japan, China, Australia, Mexico, Canada, the United Kingdom, and the EU).

Each product page clearly displays the “Ships From” location before checkout.


Shipping Methods & Estimated Delivery

Shipping Method Estimated Delivery Cost
Free Shipping (US) 5–10 business days Free, available on eligible items
Standard Shipping (US to US by Item) 5–10 business days $5.95 for the first item, $3.00 each additional
Standard Shipping (From US Warehouse by Weight) 3–7 business days Starts at $5.95, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb.
Extended Delivery (Ships from Overseas Warehouse) 10–20 business days $14.99 for the first item, $2.00 each additional

Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.

Free Shipping

We offer free standard shipping on select products or during promotional periods. Availability of free shipping will be displayed on the product page and at checkout. 


Carriers

We primarily use USPS and UPS for U.S. deliveries. Items shipped from international warehouses may be handled by partner carriers depending on the country of origin.


Import Duties & Taxes

All import duties and taxes for goods imported into the United States are included in the product price. There are no hidden fees or additional charges at checkout.


Tracking & Notifications

Every order is fully trackable. You will receive a tracking number via email once your order ships. If your order ships in multiple packages, each package will have its own tracking number. If you don’t receive a shipping confirmation immediately, your order is still being processed and will arrive within the estimated timeframe shown at checkout.

You can track your shipment anytime using the Track Your Order page on our website.


Order Changes & Cancellations

If you need to modify or cancel an order, please contact our customer support team as soon as possible. Orders can only be canceled before they ship. Once shipped, cancellations are not possible, but you may request a return after the item is delivered.

Contact: support@ibspot.com


Item Not Received

If your tracking number shows “Delivered” but you haven’t received your package:

  1. Check with your local USPS or UPS office.
  2. Confirm that the shipping address provided was correct.
  3. If the issue remains unresolved, contact support@ibspot.com for assistance.

Damaged or Lost Parcels

If your package arrives damaged or fails to arrive, please contact us immediately. For deliveries to P.O. boxes, ibspot is not responsible for damage caused by weather, temperature, or theft.


Customer Support

For any questions about shipping, tracking, or delivery, our customer support team is here to help.

Email: support@ibspot.com

We’re always happy to help.

Please read our policy carefully before making a purchase.
We aim to ensure every customer has a smooth and transparent experience with ibspot.com.


Order Cancellation Policy

Customers may request to cancel an order before it has been shipped.
Once the package has been shipped, cancellations are no longer possible; however, you may still request a return after receiving your order.

How to Request a Cancellation

You can contact us through:

Please submit your cancellation request as soon as possible after placing the order to allow us to process it before shipment.


Return Policy

We accept returns for most items within 30 days of delivery for a full refund.

To be eligible for a return:

  • The item must be unused, in the same condition as received, and in its original packaging.
  • A tracking number must be provided to confirm the return shipment.

Non-Returnable Items

Certain products cannot be returned, including:

  • Perishable goods (for example, food, flowers, newspapers, magazines)
  • Intimate or sanitary goods
  • Hazardous materials or flammable liquids/gases
  • Gift cards
  • Downloadable software
  • Some health and personal care items

Partial Refunds (If Applicable)

Partial refunds may be granted in specific situations, such as:

  • Books with obvious signs of use
  • Opened CDs, DVDs, software, or vinyl records
  • Items not in their original condition, damaged, or missing parts not due to our error
  • Items returned more than 30 days after delivery

How to Return an Item

To initiate a return, please contact us at support@ibspot.com with your order number and details about the product you wish to return.
Our team will provide you with return instructions and a prepaid return label.


Shipping Cost for Returns

Please contact us before returning any item.

We may provide a return shipping label for your return. If the return is due to our error, such as receiving the wrong item, a damaged item, or a defective product, we will cover the return shipping cost.

If the return is due to the customer’s reason, such as ordering the wrong item, changing your mind, or no longer needing the item, the original shipping fee and the return label fee will be deducted from your refund amount.

If a return is sent back without prior contact or without using our provided label, we cannot be held responsible for any return shipping costs or delivery issues.

For items valued over $75, we recommend using a trackable shipping service or purchasing shipping insurance.
We cannot guarantee that we will receive your returned item if shipped independently.


Refund Processing

Once your return is received and inspected:

  • In-store returns are refunded to the original form of payment or issued as a gift card.
  • Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.

Please allow:

  • 5–7 business days for the return to reach our Returns Center.
  • An additional 3–10 business days for your bank to post the refund to your account.

Damages, Issues & Claims

Please inspect your order immediately upon receipt.
If you receive a defective, damaged, or incorrect item, contact us right away at support@ibspot.com.
We’ll evaluate the issue promptly and make it right.

Product Claims

Before purchasing, please review product details carefully.
If there is a problem with your order upon arrival, visit our Support Center or contact us directly to arrange return shipping or replacement.


Exchanges

We do not process direct exchanges.
The fastest way to get what you need is to return the original item and place a new order once your return is accepted.


Return Address

IBSPOT Return Center
15 Sawmill Ln
Dover Plains, NY 12522
United States


Customer Support

Our support team is available 24/7 to assist with cancellations, returns, or general inquiries.

Email: support@ibspot.com
Contact Form: Contact Us page

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