Value Collection 22290 Screw Pitch Gage 18 Leaf Inch

Product Description

The VALUE COLLECTION 22290 is an 18-leaf screw pitch gage set designed to measure thread pitch on both external and internal threads using the inch measurement system. Each leaf is stamped with its corresponding pitch value, allowing a technician to fan through the set and match the leaf to a threaded fastener or tapped hole until a flush fit is achieved. The thread angle is 60 degrees, which corresponds to standard Unified National thread forms (UN, UNC, UNF, UNEF). The leaves are constructed from steel for durability in shop environments.

This gage set is suited for use in machine shops, maintenance facilities, fabrication shops, and field service applications where identifying unknown thread pitch on fasteners, fittings, or tapped components is required. Plumbers, pipefitters, machinists, and mechanical contractors use pitch gages when sorting mixed fastener stock, verifying thread form before assembly, or identifying replacement hardware. The 18-leaf configuration covers a practical range of common inch thread pitches without requiring a separate gage set for coarse and fine series.

Key Features

• 18 leaves cover a broad range of standard inch thread pitches in a single set
• 60-degree thread angle matches Unified National (UN) thread form standards
• Measures both external threads (bolts, studs, screws) and internal threads (nuts, tapped holes)
• Steel leaf construction for resistance to wear in shop use
• Compact folding format keeps leaves organized and protected when not in use

Compatibility

Designed for measuring inch-series threads with a 60-degree thread angle, consistent with Unified National thread standards used on standard fasteners and fittings in general mechanical and trade applications.

Installation Notes

No installation is required for this measuring tool. To use, fan the leaves and select the one that best matches the thread spacing of the fastener or tapped hole, checking for a flush, gap-free fit against the thread flanks. Wipe leaves clean after use and avoid bending or forcing leaves against damaged threads, as this can deform the thin steel and reduce gage accuracy. Store the set folded and away from coolants or corrosive fluids to maintain leaf condition.