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When you're mid-project and need to lock down a workpiece fast, fumbling for a wrench breaks your flow. Makers, machinists, and hands-on DIYers who rely on repeatable setups know that wing knob bolts with Z-handle grips are the answer — letting you tighten and release clamps, fences, and fixtures with a firm hand-twist and zero tools.
These Z-handle wing knob bolts are machined from A2 stainless steel (304-grade equivalent), offering solid corrosion resistance for both indoor workshop and light outdoor use. Two handle styles are available: the 36# series features a wider, more ergonomic grip for high-torque applications, while the 27# series offers a compact profile suited to tighter clearances. Thread diameters span M4, M5, M6, and M8; shank lengths range from 8 mm (0.31 in) to 85 mm (3.35 in). Matching hex nuts in M4, M5, M6, and M8 are also available for complete fastening assemblies.
Typical use cases include woodworking jig clamping knobs, CNC router hold-down bolts, 3D-printer bed-leveling thumb screws, camera rig quick-release fasteners, and machine guard panel fasteners — anywhere hand-adjustable metric thumb screws replace conventional hex bolts for faster iteration.
| Material | A2 Stainless Steel (304-grade equivalent) |
|---|---|
| Thread Standard | Metric (ISO) |
| Thread Diameters | M4, M5, M6, M8 |
| Shank Length Range | 8 mm – 85 mm (0.31 in – 3.35 in) |
| Handle Style | 36# (wide grip) / 27# (compact grip) |
| Head Type | Z-Handle Wing Knob |
| Drive Method | Hand-tightened (tool-free) |
| Finish | Natural stainless (brushed) |
| Nut Compatibility | Matching M4 / M5 / M6 / M8 hex nuts available as variants |
| Available Quantities | 1 pcs / 5 pcs per order |
| Thread Pitch | See variant options |
| Head Diameter | See variant options |
The 36# series has a wider, longer Z-arm that gives more leverage — ideal when you need firm clamping force or will be tightening frequently. The 27# series is more compact, making it the right choice when space around the bolt head is limited, such as inside enclosures or on narrow jig rails. Check the clearance around your mounting point before selecting.
These bolts follow standard ISO metric coarse-pitch threading: M4×0.7, M5×0.8, M6×1.0, and M8×1.25. This matches the vast majority of metric tapped holes in woodworking jigs, machine tools, and industrial fixtures. If your application requires fine pitch, please contact us to confirm before ordering.
A2 stainless steel provides adequate tensile strength for hand-tightened clamping applications — typically 500–700 MPa tensile strength depending on diameter. These are designed for tool-free, moderate-torque use cases such as jig fences, hold-downs, and panel fasteners. They are not intended as structural load-bearing fasteners in high-vibration or heavy-load environments.
A2 stainless steel offers good resistance to atmospheric corrosion, moisture, and mild chemicals. It performs well in humid workshops, light outdoor enclosures, and marine-adjacent environments. For prolonged saltwater or chemical immersion, A4 (316) stainless would be more appropriate. For typical workshop and DIY use, these will remain rust-free with no special maintenance.
Yes. The M4, M5, M6, and M8 threads are fully compatible with any standard ISO metric hex nut, flange nut, or washer of the matching size. Matching hex nuts are also available as separate variants in this listing for convenience. Standard metric washers from any hardware supplier will fit without modification.
The 1 pcs option is ideal for prototyping, replacement of a single worn fastener, or testing a size before committing to a larger quantity. The 5 pcs pack offers a lower per-unit cost and is suited for production jigs, repeat builds, or keeping spares on hand. Both options ship the same bolt — only the quantity and price differ.
Measure the total material thickness you need to clamp through, then add at least 5–10 mm for nut engagement (or thread engagement into a tapped hole). For example, clamping through 20 mm of material into a tapped hole requires at least a 25–30 mm shank. If using a nut on the back, add the nut height (typically 4–7 mm for M5–M8) to your calculation. When in doubt, size up — excess thread can always be accommodated with a washer.
