• Surface drive technology reduces fastener rounding
• Chamfered opening to guide fastener into socket
• Large hard-stamped size identification
• Double line (S’) and knurled (Metric) ring to easily identify standard vs. Metric sockets
• Full polish chrome finish cleans easily and resists corrosion
• Meets or Exceeds ASME B107.1 and US Federal Spec. GGG-W-641 E
• S’/Metric/Torx: S’
• ASME Specification: B107.1
• Fastener Size: 5/16ö
• Drive Type: 6 Point
• Drive Tang Size: 3/8ö
• Length Format: Standard
• Dim. A: Drive End: 0.677ö
• Dim. C: Overall Length: 0.984ö
• Dim. F: Length to Shoulder: 0.453ö
• Dim. D: Bolt Clearance: 0.283ö
• Dim. E: Wrench Depth: 0.295ö
• Dim. B: Wrench End: 0.461ö
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