5/16-18 X 8 Hex Head Cap Screw Grade 2 Steel Zinc Plated

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Hex Head Cap Screws

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Since 1947
SKU: 31128CH2KC Product Size: 5/16-18 X 8 Weight: 40 lbs Condition: New
$724.91 for Pack of 225 Hex Cap Screws
That's only $3.2218 per Hex Cap Screw
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5/16-18 X 8 Hex Head Cap Screw Grade 2 Steel Zinc Plated

• Description: A low or medium carbon steel, externally threaded mechanical device 1/4" diameter or larger, with a trimmed hex head and a washer face on the bearing surface.
• Applications/Advantages: Economical for use in non-critical applications where the fastener is not subject to extreme temperatures or stress beyond the limits listed herein.
• Material: AISI 1006 - 1050 or equivalent steel.
• Hardness: 1/4 through 3/4 in. diameter, 6 in. and shorter in length: Rockwell B80 - B100. 1/4 through 3/4 in. diameter, over 6 in. in length: Rockwell B70 - B100.  7/8 through 1-1/2 in. diameter, all lengths: Rockwell B70 - B100.
• Proof Load: 1/4 through 3/4 in. diameter, 6 in. and shorter in length: 55,000 psi.  1/4 through 3/4 in. diameter, over 6 in. in length: 33,000 psi.  7/8 through 1-1/2 in. diameter, all lengths: 33,000 psi.
• Yield Strength*: 1/4 through 3/4 in. diameter, 6 in. and shorter in length: 57,000 psi. minimum. 1/4 through 3/4 in. diameter, over 6 in. in length: 36,000 psi. minimum. 7/8 through 1-1/2 in. diameter, all lengths: 36,000 psi. minimum.
• Tensile Strength: 1/4 through 3/4 in. diameter, 6 in. and shorter in length: 74,000 psi. minimum.  1/4 through 3/4 in. diameter, over 6 in. in length: 60,000 psi. minimum.  7/8 through 1-1/2 in. diameter, all lengths: 60,000 psi. minimum.
• Elongation:* 18% minimum (all diameters)
• Reduction of Area:* 35% minimum (all sizes)
• Plating: See Appendix-A for plating information

  *These properties are tested only on machined specimens when the testing machine cannot provide for full testing of the parts.

This Mutual Screw & Supply 31128CH2KC 5/16-18 Grade 2 Zinc Plated Steel Hex Head Cap Screws typically ships within 24 to 48 hours