Te-Co T-slot nuts are essential components for securing workpieces on CNC routers, milling machines, and workbenches with standard slot profiles. The selection below highlights quality options in black oxide 1018 steel across common thread sizes and table-slot dimensions. Each product is evaluated for compatibility with typical 1/2, 3/8, and 5/16 inch slot systems, offering strong clamping, reliable fits, and durable finishes for long-term use.
| Product | Thread | Table Slot | Pack |
|---|---|---|---|
| Te-Co 41410 Black Oxide 1018 Steel T-Slot Nut | 1/2″-13 | 5/8″ | 5 |
| 4PC Set T-Slot Nut Black Oxide Finish | 3/8″-16 | 1/2″ | 4 |
| Te-Co 41406 Black Oxide 1018 Steel T-Slot Nut | 3/8″-16 | 9/16″ | 5 |
| Wulankd T-Slot Nut Black Oxide Finish | 1/2″-13 | 5/8″ | 4 |
| Te-Co 41409 Black Oxide 1018 Steel T-Slot Nut | 1/2″-13 | 9/16″ | 5 |
Te-Co 41410 Black Oxide 1018 Steel T-Slot Nut

The Te-Co 41410 is made from case-hardened 1018 steel with a black oxide finish, providing a robust 1/2″-13 thread. Designed for a 5/8″ table slot, it fits standard industrial slots while offering strong clamping capabilities. This pack contains 5 nuts, suitable for expanding fixtures or building multiple clamps for CNC or milling setups. The increased height supports stable engagement under load, making it a practical choice for repeatable workholding.
4PC Set T-Slot Nut Black Oxide Finish 3/8-16 Threads

This set uses 1018 steel with a black oxide finish for corrosion resistance and durability. The 3/8″-16 thread size is common for lighter-duty fixtures, paired with a 1/2″ table slot. Each nut’s base dimensions measure approximately 0.861″ x 0.895″ with a height of about 0.571″, providing reliable engagement in standard T-slot tracks. The 4-piece pack is ideal for small shop setups or incremental fixture builds without compromising strength.
Te-Co 41406 Black Oxide 1018 Steel T-Slot Nut

The 41406 employs case-hardened 1018 steel with a black oxide finish for 3/8″-16 threads and a 9/16″ table slot. This nut is designed for secure clamping in narrower tracks while maintaining stiffness under load. Packaged in sets of five, it supports repeatable clamping tasks in milling or routing operations where slot width is a critical dimension.
Wulankd T-Slot Nut Black Oxide Finish

Wulankd offers a 1/2″-13 thread with a 5/8″ table slot in a durable case-hardened 1018 steel framework. The nuts feature a black oxide finish for corrosion protection and aesthetic uniformity with other T-slot hardware. The design emphasizes safe clamping with a base size of 1″ x 1″ and a height of 0.6″, contributing to stable fixture assemblies in CNC tables or industrial milling setups. This 4-pack provides efficient coverage for multiple work zones.
Te-Co 41409 Black Oxide 1018 Steel T-Slot Nut

The 41409 version mirrors the 41410 with a 1/2″-13 thread and 9/16″ table slot, tight for mid-range applications requiring strong engagement. Pack size of five preserves consistent supply for extended setups or staggered fixture installations on 1/2″-slot machines or benches with comparable track widths. The black oxide finish helps guard against corrosion in busy workshop environments.
Te-Co 41434 Black Oxide 1018 Steel T-Slot Nut

The 5/16″-18 thread size in this nut is paired with a 1/2″ table slot and a 7/8″ width footprint. The 1018 steel with black oxide finish offers dependable clamping for lighter-duty fixtures, jig setups, and assembly lines that rely on precise 5/16″-18 fasteners. The pack of five supports quick stocking for versatile projects and repeated reuse in workshop environments.
Te-Co 41406T Black Oxide 1018 Steel Tapped Through T-Slot Nut

The 41406T is a through-nut version with 3/8″-16 threads and a 9/16″ table slot. This threaded-through arrangement provides an alternate clamping path, which can be advantageous when the nut must be secured from both sides or integrated into a fixture that requires deeper engagement. The powder-coated appearance matches standard 1018 steel variants for consistent tooling aesthetics. Pack of five ensures ready replacement or expansion as needed.
Te-Co 41403 Black Oxide 1018 Steel T-Slot Nut

The 5/16″-18 thread version features a 3/8″ table slot and a compact profile ideal for lighter fixtures requiring precise alignment in tight spaces. The 1018 steel with black oxide finish ensures a durable surface with good wear resistance. A pack of five supports fixture redundancy across multi-part setups and quick swaps during batch processing or jig adjustments.
Buying Guide: Key Purchase Considerations
- Thread size and compatibility: Match the nut’s thread to the fastener you’ll use and the machine’s threaded inserts. Common sizes in this list include 5/16″-18, 3/8″-16, and 1/2″-13.
- Table slot dimensions: Ensure the nut’s base and height align with your slot width and track depth. Typical slots range from 1/2″ to 9/16″ or larger, with corresponding nut heights around 0.6″ to 0.9″.
- Finish and material: Black oxide on 1018 steel provides wear resistance and corrosion protection in typical workshop conditions. For high-stress environments, consider through-nut designs or hardened variants.
- Pack quantity: Determine whether you need singles, halves, or full sets for fixtures, jigs, and repeatable processes. Packs of five or four are common for practical coverage.
- Through vs. blind engagement: Through-style nuts allow engagement from both sides, beneficial for certain fixture layouts. Blind/narrow nuts are compact and fit in tighter slots.
- Brand and compatibility: While Te-Co is a frequent choice, options from other brands (like LLDSIMEX and Wulankd) provide similar dimensions with slight dimensional differences—verify exact slot size before ordering.
- Installation considerations: Check for any required clearance around the slot edges and ensure clamps or bolts won’t interfere with adjacent parts or tools.
When selecting Te-Co T-slot nuts, prioritize matching thread size to your clamp bolts, slot width to the nut’s base, and the intended load profile of your workholding setup. Durable black oxide finishes improve longevity in busy workshops, while through-nut variants can offer additional installation flexibility for complex fixtures. Ordering a small set initially helps verify fit and performance before scaling to larger kits for production environments.