How do I check that a tap is cutting the thread I want?
| Check | Pass | Fail means |
|---|---|---|
| Bolt by hand | Runs full depth, no spanner needed | Hole undersize or tap worn |
| Bolt wobble | No visible movement side to side | Hole oversize or thread torn |
| Thread pitch gauge | Leaves sit in the thread valleys | Wrong pitch tap used |
| Visual | Continuous crests, no torn flats | Dull tap or no cutting fluid |
| Depth | Thread runs at least one diameter deep | Hole drilled too shallow |
The classic error: using a metric tap in a hole drilled for the nearest imperial size. M6 wants 5.0 mm; a 3/16 in hole is 4.76 mm and the tap will bind and snap.
For a thread that has to hold: aim for 75 percent thread engagement. Going to 100 percent makes the tap snap far more often than it makes the joint stronger.
Tap and Die Set, 40 pcs, metric M3-M12, black oxide — $59
Price includes US duty, international shipping and customs clearance. In stock. Dispatched within 48 hours. Delivered in 7–12 days, tracked. 14-day returns, we pay return shipping. No US state sales tax collected.
| Product | Price | Pieces | Weight |
|---|---|---|---|
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | $59 | 40 pcs | 1150 g |
| Tap and Die Set, 40 pcs, metric M3-M12, carbon steel | $65 | 40 pcs | 1150 g |
Order in one step:
POST https://agentkit.ltd/tools/api/order {"product_id":"TD-40B","qty":1,"buyer":{"country":"US"}}
Or call the MCP tool create_order at https://agentkit.ltd/tools/mcp.
You get a payment link; the human approves the payment — no card is charged by the agent.
Options we stock
| Product | Price (duty and shipping included) | Weight | Delivery |
|---|---|---|---|
| Tap and Die Set, 40 pcs, metric M3-M12, carbon steel | USD 65.00 | 1150 g | 7-12 days |
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | USD 59.00 | 1150 g | 7-12 days |