Value Collection 70031 T-slot Bolt 7/8-9 Steel Uncoated

Product Description

The VALUE COLLECTION 70031 is a heavy-duty steel T-slot bolt designed to secure workpieces and fixtures to T-slotted machine tables, jigs, and fixture plates. It features a 7/8-9 UNC thread with a 3.5-inch thread length and is machined from Grade C-1045 steel for reliable tensile strength under clamping loads. With a Class 3 thread fit, it meets the precision tolerance requirements of standard machine tool applications. The uncoated finish leaves the steel bare, making it suitable for use with standard machine oils or coolants encountered in typical shop environments. Millwrights, machinists, and tool-and-die professionals are the primary installers of this fastener.

This T-slot bolt is suited for use on milling machines, drill presses, surface grinders, and other machine tools equipped with standard 1-inch T-slots. The 16-inch length under head accommodates deep T-slot table setups and tall workholding assemblies. The 1-3/4-inch head width is sized to engage a 1-inch slot cleanly, while the 5/8-inch head height provides adequate bearing surface for clamping straps and step blocks. It is also commonly used in custom fixturing and welding tables where T-slot extrusions or cast iron T-slot plates are present.

Key Features

• 7/8-9 UNC thread with 3.5-inch thread length for broad clamping range
• Grade C-1045 steel construction for high strength under clamping loads
• Class 3 thread fit for precise tolerance compliance
• 1-inch slot width fitment with 1-3/4-inch head width
• 16-inch length under head for deep table and tall workholding setups
• Uncoated finish compatible with standard shop oils and coolants

Compatibility

Designed for use with standard 1-inch T-slot machine tables, fixture plates, and T-slot extrusions where a 7/8-9 UNC thread pattern is required.

Installation Notes

Installation is typically performed by machinists or millwrights using standard hand tools. Always de-energize and lock out the machine before inserting or removing T-slot bolts. Slide the bolt head into the T-slot track before threading on the nut or clamping hardware — do not force an oversized head into a slot. Verify the slot width matches the bolt head dimensions before applying clamping torque to avoid deforming the slot walls.