5/16" inner diameter = 0.313 inch

10 Shielded Bearing R1810ZZ 5/16"x1/2"x5/32" inch Miniature Ball Bearings

Price: $19.95

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SFR1810ZZ Flanged Bearing Stainless Steel Shielded 5/16"x1/2"x5/32" inch Miniature Ball Bearings

Price: $9.95

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F1029 Unground Flanged Full Complement Bearing 5/16"x29/32"x7/16" Inch Ball Bearings

Price: $3.99

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1603ZZ Shielded Bearing 5/16"x7/8"x9/32" inch Miniature Ball Bearings

Price: $4.95

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5/16" Miniature Stamped Pillow Block Mounted Bearings

Price: $3.95

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F1028 Unground Flanged Full Complement Bearing 5/16"x7/8"x5/16" Inch Ball Bearings

Price: $3.77

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SR1810 Stainless Steel Bearing Open 5/16" x 1/2" x 5/32" inch Ball Bearings

Price: $17.77

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