Casing
N&N Drilling Supply manufactures the largest variety of grout casing in the industry and stocks a full line of “W” series casing made from high-strength steel tubing for superior durability and performance.
We use top-quality 4130-grade material, ensuring exceptional strength and reliability. Our in-house engineers have designed and field-tested advanced dual and triple lead threads, along with custom thread designs to meet the unique needs of contractors and align with industry standards.
For precision-engineered casing pipe that delivers unmatched performance in geotechnical drilling, water well drilling, and mineral exploration, trust N&N Drilling Supply—your partner in high-quality drilling solutions.

Applications:
At N&N Drilling Supply, our W-series steel casing is designed for exceptional strength, durability, and efficiency. Featuring double butt joints for added reinforcement and flush threading inside and out, our casing eliminates the need for couplings, simplifying assembly and maintenance. The precision-engineered dimensions ensure that each casing size fits the hole drilled by the next larger size core bit, allowing seamless integration between sizes.
Unmatched Quality & Precision Engineering
We uphold the highest industry standards, ensuring our casing meets or exceeds DCDMA specifications for:
✔ Uniform concentricity
✔ Size accuracy
✔ High-strength materials
✔ Precision threading
Each piece is meticulously inspected for tight tolerances by our expert CNC operators, guaranteeing superior performance for geotechnical drilling, mineral exploration, water well drilling, and soil stabilization applications.
Comprehensive Flush Joint Casing Options
We manufacture an extensive range of Flush Joint Casing using top-grade 4130 material for enhanced strength and longevity. Additional options include:
✔ Heat-treated ends (available at an additional cost)
✔ 1026 and N-80 grade materials (available at reduced pricing)
✔ Left-hand threading (available at no additional cost)
Stock Sizes Available
AW, BW, NW, HW, PW, SW, ZW, BWT, NWT, HWT, PWT, SWT
Fast Shipping & Immediate Availability
With a fully stocked warehouse, we ensure immediate order fulfillment, minimizing downtime and keeping your projects on track. Many of our products, including casing pipe, ship the same day we receive your order.
Additional Drilling Accessories Available
In addition to casing, N&N Drilling Supply offers a full range of drilling tools and accessories, including:
✔ Drive Heads
✔ Drive Shoes
✔ Diamond/Carbide Basing Shoes
✔ Casing Advancers
✔ Casing Cutters
Casing Types Offered
• Flush Joint – “W” & “WT” Series
• F-480 Flush Joint
• Grout Casing
• Galvanized & Stainless Steel Casing
Custom Options Available
We also offer special materials and threading options to meet your specific project needs.
Trust N&N Drilling Supply for industry-leading casing solutions that deliver strength, precision, and reliability for every drilling application.
Not sure what size you need? Check the chart below.
W Flush Joint Casing
Size | O.D. inches | O.D. mm | Threads Per Inch | I.D. inches | I.D. mm | Weight LB/10Ft | Weight Kg/3M |
---|---|---|---|---|---|---|---|
ZW | 8.625 | 219.1 | 2 | 8 | 203.2 | 275 | 124 |
UW | 7.625 | 193.6 | 2 | 7 | 177.8 | 242 | 109 |
SW | 6.625 | 168.2 | 3 | 6 | 152.4 | 201 | 90 |
PW | 5.5 | 139.7 | 3 | 5 | 127 | 144 | 72 |
HW | 4.5 | 114.3 | 4 | 4 | 101.6 | 118 | 53 |
NW | 3.5 | 88.9 | 4 | 3 | 76.2 | 85 | 39 |
BW | 2.875 | 73 | 4 | 2.375 | 60.3 | 71 | 32 |
AW | 2.25 | 57.1 | 4 | 1.906 | 48.4 | 37 | 17 |
WT Flush Joint Casing
Size | O.D. inches | O.D. mm | I.D. inches | I.D. mm | Threads Per Inch | Weight LB/10Ft | Weight Kg/3M |
---|---|---|---|---|---|---|---|
BWT | 2.875 | 73 | 2.375 | 60.3 | 2.5 | 71 | 32 |
NWT | 3.5 | 88.9 | 3 | 76.2 | 2.5 | 85 | 39 |
HWT | 4.5 | 114.3 | 4 | 101.6 | 2.5 | 118 | 53 |
PWT | 5.5 | 139.7 | 5 | 127 | 2.5 | 144 | 72 |
SWT | 6.625 | 168.2 | 6 | 152.4 | 2.5 | 201 | 90 |
View Casing Catalog Below!
Request A Quote
Our cutting-edge equipment and precision-engineered solutions are tailor-made to meet your specific requirements. Experience the efficiency, durability, and unmatched performance of our products. Take the first step towards success and unlock the full potential of your projects by requesting a quote from N&N Drilling Products now!