metric thread gauge with 6h tolerance

{"cid":"91221137","title":"Metric Thread Ring Gauge M4 Tools Steel with Class 6G Tolerance","imgUrl":"https:\/\/img.chinax.com\/nimg\/1a\/35\/88478ffed4a616e90d4d78abf36f-200x200-1.jpg","attrs":{"Brand Name":"KM","Model Number":"KM-R040","Delivery Time":"Within 15days","Certification":"ISO DIN GB RoHS","Place of Origin":"Shaanxi, China","Payment Terms":"T\/T,L\/C,D\/P,D\/A,Western Union,PayPal,MoneyGram","Supply Ability":"50000pieces\/Month","Packaging Details":"ABS Box 4*4*1.5cm\/Piece 0.05kg\/Piece","Warranty":"One Year","Type":"Thread Ring Gauge","Measurement":"Metric","Material":"Tool Steel","Range":"M4.0","Usage":"for Working and Inspection","Shape":"Round","Processing":"Fine Lapping","Package":"ABS Box"}}

{"cid":"91189062","title":"Straight Flute Hand Thread Tap , 6H Tolerance Metric Plug Tap 62 - 66HRC Hardness","imgUrl":"https:\/\/img.chinax.com\/nimg\/ac\/ad\/b1df593230dfc4b0edfccb146432-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Starry","Model Number":"M2-M68","Minimum Order Quantity":"500pcs metric taps","Delivery Time":"30working days","Certification":"ISO9000","Place of Origin":"JIANG SU","Payment Terms":"T\/T, L\/C, Western Union","Supply Ability":"500000 Piece\/Pieces per Month Hand Taps Screw Tap","Packaging Details":"Plastic box,PVC bags","Hardness":"62-66HRC","Surface":"Bright","Flute":"Straight Flute","Processing":"Fully Ground","Standard":"ISO529","Tolerance":"6H"}}