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Counterbore Screws, ASTM A320 L7, L7M

12-point Flange Screws, Counterbore Screws,  Ferry Head Cap Screws or Counterbore Screws, feature a 12 point head and a flanged bearing surface. Usually fully threaded, the 12-point design provides for higher tightening torque, without edge rounding and they are covered under ASME Standard B18.2.1

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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Fastener OH12 Point Flange Screw (CounterBore)ASTM A320 L7, L7MZinc/Yellow1/2-13 x 1 1/412 point cap screw 1/2-13x1-1/4 a320 l7 zinc yellow 8
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Fastener OH12 Point Flange Screw (CounterBore)ASTM A320 L7, L7MZinc/Yellow1/2-13 x 312 point cap screw 1/2-13x3 a320 l7 zinc yellow 16
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DeltaTX12 Point Flange Screw (CounterBore)ASTM A320 L7, L7MPlain77/16-14 x 7/812 pt countr-bor l7m 7/16-14 x 7/8 (XYLAN 1052 BLUE)529
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Fastener OH12 Point Flange Screw (CounterBore)ASTM A320 L7, L7MZinc/Yellow3/4-10 x 2 1/412 point cap screw 3/4-10x2-1/4 a320 l7 zinc yellow 18
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Dan-LocTX12 Point Flange Screw (CounterBore)ASTM A320 L7, L7MPlain320ferry head cap screw l7 blank 1 x 12 astm a-320500
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