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Din6921 Grade 8.8

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Company: HAIYAN YAOZHIBAO IMPORT&EXPORT CO.,LTD
Keywords: Bolts / Flange Bolts / Din6921
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Product Details

GRADE-8.8 HEX FLANGE BOLTS

Description

A one-piece hex washer head bolts with a flat bearing surface or serrated bearing surface,made of medium carbon steel

Applications/Advantages

Designed for use in applications where loosening forces,such as vibration,are present.After being installed,the serrations grip to the bearing surface so that significantly greater torque is needed to loosen the fastener that to tighten it.Can eliminate the need for a lock washer or locknut in certain applications

Tempering Temperature

425°C minimum.

Material

Class 8.8 carbon steel chemical compostion:Carbon-0.15 - 0.55%;Phosphorous-0.35% max;Sulphur-0.35% max

Core Hardness

Rockwell C22 - C32.

Surface Hardness

Rockwell 30N54.4 maximum.

Proof Stress

640N/mm2 minimum

Tensile Strength

800N/mm2 minimum