Niigata Seiki SK Made in Japan Limit Plug Gauge for Work H7 4 LP4-H7

Inspect the accuracy of the hole diameter on the passing side and the non-stop side. Application: Inspection of hole diameter. Material: Gauge part: Alloy tool steel, Shank part: Aluminum Specifications: Grade H7, hardness HV660~780, surface roughness Ra within 0.2μm Standard: φ4 L(mm): 77 K1(mm): 10 K2(mm): 5 M(mm): 6