LNG 패스너
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ASTM A320 등급 L7 합금강 헤비 육각 볼트
ASTM A320 Grade L7 alloy steel heavy hex bolts are impact-tested, quenched-and-tempered fasteners for low-temperature pressure vessels, 밸브, 플랜지, fittings and industrial equipment.
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ASTM A320 등급 L7M 합금강 헤비 육각 볼트
ASTM A320 Grade L7M alloy steel heavy hex bolts combine low-temperature impact requirements with restricted hardness for pressure-equipment joints where the project specifies L7M.