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brass fitting nuts

Countersunk bolts are heavy profile hexagon head bolts with full or partial thread configurations. boltport is a manufacturer of countersunk bolts in metric and imperial sizes with coarse, fine, extra fine, and custom threads to various dimensional standards and material specifications.

Metric bolts are sized differently than us standard bolts and are commonly used in machinery. plow bolts are similar to carriage bolts. they are made with a countersunk head for a flat finished surface. slotted flat head cap screws are designed with countersunk heads, making them good for applications that require perfectly flush surfaces.

Metric bolt grades and strength calculator to show proof strength, tensile strength, vickers / brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. some notes from iso 898 metric screw threads standards:

Hillman 24-count 1/4-in plain steel standard (sae) flat spring nuts. item #438655 model #1157

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