Certiflat 8"X12"X4" Wide 90 Degree FabSquare

CertiFlat fabSquares are perfect for Fixtures, Jigs & Table Extensions!

CertiFlat's fabSquares were designed to fill a need in the market for an affordable fabricator's square. Unlike cast ground (really expensive) squares that currently exist in the marketplace, fabSquares are manufactured kits.

By using precision sheet steel and ultra tight Aerospace Grade CNC Laser Cutting Equipment, CertiFlat is able to produce high-quality tooling at prices YOU can afford! Most companies take the traditional route and they cast a part that is way to big, then machine grind it flat. Instead, we do our homework and do the engineering up front, where we are able to produce a cost-effective alternative that will last a lifetime when properly taken care of.


Our proprietary Tab & Slot methodology for building stiff, accurate welding fixtures has been proven in real world manufacturing settings for over 15 years. We design and build welding fixtures for every Power-sports OEM in the US. If you're riding an ATV the was sold in this country in the last ten years; there's probably weldments on it that came out of our Tab & Slot fixtures! We are work holding specialists.


FS81290-2 CertiFlat fabSquare Features List:


  • Engineered Tab & Slot CNC Lasered Features for easy assembly.

  • Proprietary  "Heat Control Design" to eliminate warping during assembly. 

  • +/- .1deg. when properly assembled and welded. Very high precision.

  • 16mm holes on 1" centers work with all 16mm tooling, as well as, most 5/8" tools.

  • CNC Laser Cutting of all components. OUR PARTS FIT!

  • 100's of uses! Perfect for building frames, as table extensions for fabBlocks.

  • LIFETIME GUARANTEE! If at any time you are not satisfied with your fabSquare, you, as the original purchaser, may return them for a full refund or replacement!

CNC Sheet Laser Parts go together fast and square. The Tab and Slot Methodology is used throughout to make it simple to build a quality tool that lasts forever. Internal webbing forces the table flat during assembly and keeps it that way for years of trouble-free and accurate welding. 16mm holes on 1" centers fit all Strong brand clamps and tools, which allows for infinite fixture positions. Unique Tab and Slot design forces parts square during assembly. Specially designed weld points put the heat in the middle of the material and eliminates weld pull. 

Call or Text 651.800.4877 if you have any questions or need a custom size table.

We offer custom sizes, thickness and Blanchard grinding on request.

Happy welding.

Unless you are making arrangements to pick up your purchase, all items require shipping.

How much is it to ship?

  • Shipping is currently flat rate and it depends on the weight. All pro tables can ship UPS to your door for a max price $99.99.
  • FabBlocks MUST ship freight, that rate is $99.99 to a commercial address or terminal or $129.99 for a residential delivery with liftgate.
  • Depending on where you live, the largest block we can put on a liftgate is 4’x8’. Some areas are limited to 90” length.

Most certiflat items are very heavy. UPS has a weight limit of 150lbs.

  • Our pro table line, and 24x36/24x48 mini blocks can be split up and ship in multiple boxes via ups.
  • The 36x48 mini block and regular fabblocks need to ship freight due to number of parts and weight.
  • Fabblocks smaller than 60" can be delivered to a residential address with a liftgate, anything larger will either need to go to a shipping terminal for you to pick up, or delivered to a commercial address with a dock/forklift.

Home based businesses and farms do not qualify for commercial status even with a forklift.

  • We will be flagged with a residential delivery and residential delivery must be purchased when adding products to your shoppinng cart.
  • The flat rate shipping offers are to the lower 48 contiguous states.
  • We also ship to alaska, puerto rico, haiwiaii, canada & mexico, contact us for a quote.


  • Call or text us at 651.800.4877
  • Email us at Sales@weldtables.com


-PRO Table Tops

  • Made from HRPO A36 Steel
  • 2” tall rib support structure
  • 3/16” thick top and rib structure
  • Tab and Slot Design for easy assembly
  • Laser cut for tight tolerances
  • 16MM holes for clamps and fixtures
  • No option for expansion


  • Same material and tolerances as PRO Top
  • 4” deep rib structure and sides
  • 3 Dimensional work surfaces on 5 sides
  • Compatible with fabWings, Vise Mount, and most side mount accessories
  • Can be bolted together for near unlimited configurations!
  • Heavier duty than PRO Tops


  • Same material and tolerances as PRO’s and Mini’s
  • 6” or 8” deep rib structure (length dependent) for strength and flatness
  • Available in ¼”, 3/8” or ½” material.
  • Increased stiffness – full torsion box design.
    Available with 16MM or tapped holes. (3/8”-16 or ½”-13 thread available depending on thickness)

Note: The FabBlock and mini-block have sides with our standard hole pattern, and can be expanded by either using our fabwings or by bolting multiple blocks together. The options for sizes and configurations are essentially endless with the Mini-Block and FabBlock style tables!


  • The pro tables use one of the heavy duty leg kits.
  • Mini-Blocks, FabBlocks, and plasma tables use our FabRack.
    • The FabRacks can be purchased with or without casters.


  • We do not offer the pro table in thicker material. Due to the rib structure design, they are limited in size (largest 3x4) and thickness.


  • Threaded holes are very convenient for bolting your fixtures or our accessories to the table. Threaded holes are the quickest way to set things up on the table.
  • When you order threaded holes, the sides of the table will have the threaded pattern as well.
  • Pro tables are not available with threaded holes as there is not enough material. To attach accessories to the pro tables you would want to use parts FBN-2 and FBS-2, the fabnut and fabnut locating spacer washer.


  • We do have a 4-pack of squares available at a discount, parts VFS-2 and VFS-4. All other accessories are a la carte.


  • Fabnuts are threaded and have an o-ring. They insert into the 16MM hole from the underside of the table and are held in place by the o-ring.
  • The fabspacer fits in the 16MM holes on our accessories and allow you to get accurate placement with a 3/8-16 bolt.


  • We do offer in house assembly by our pro welders. The cost depends on the size of table or accessory.
  • For rates contact admin@tabandslot.com


  • It depends on our workload, currently about 4-6 weeks to ship on all tables except ProTops.
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Need Help? Call Us at 651.800.4877