品質控制_邯鄲市曉軍緊固件製造有限公司

品質控制: Control In Screw Quality

Core hardness: The core hardness of screws shall after heat treatment be between 270 HV 5 and 425 HV 5

Surface hardness: The surface hardness of screws shall after heat treatment be atleast 560 HV 0.3

Torque force: Thread diameter Minimum breaking
torque in Nm

M2.9 1.5

M3.5 2.8

M3.9 3.4

M4.2 4.5

M4.2 6.5

M5.5 10

M6.3 14

Case depth: Thread diameter Minimum Maximum

M2.9 to M3.5 0.05mm 0.18mm

M3.9 to M5.5 0.10mm 0.23mm

M6.3 0.15mm 0.28mm

Catalog

Hot products: Bi-Metal Hex Washer Head; Phillips Pan Head; Torx Washer Head Knurled; Unslotted Hex Washer Head

Service: Industry

About: Quality

Mobile:+86 137 3004 3377
Email:lz@xj-fastener.com
Xiaojun Catalogue 2025
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+Catalog

+Hot products: Phillips Truss Head; Phillips Pan Head; Medium duty Hex Washer Head; Bi-Metal Hex Washer Head

+Service: Industry

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