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Counterbore Screws, Plain (ASME B18. 2.1)

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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Search Results Sponsored by Metric Threaded Products, Inc., your source for 12 Point Flange Screws. For more results, visit   www.metric-threaded.com
SupplierLocTypeMaterialFinishSizeDescriptionQty 
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GLFOH12 Point Flange Screw (CounterBore)Superalloy (Inconel, Hastelloy, Alloy 20)Plain5/16-18 x 3/45/16-18x3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () ()306,000
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GLFOH12 Point Flange Screw (CounterBore)Superalloy (Inconel, Hastelloy, Alloy 20)Plain3/8-24 x 23/8-24x2 12-pt flange bolt 17-4 ph s/s b18.2.1 () () ()49,000
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GLFOH12 Point Flange Screw (CounterBore)Superalloy (Inconel, Hastelloy, Alloy 20)Plain5/8-18 x 8 1/45/8-18x8-1/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () ()1,000
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GLFOH12 Point Flange Screw (CounterBore)Superalloy (Inconel, Hastelloy, Alloy 20)Plain5/8-18 x 6 3/45/8-18x6-3/4 12-pt flange bolt 17-4 ph s/s b18.2.1 () () ()15,000
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GLFOH12 Point Flange Screw (CounterBore)Grade 8Plain1/2-13 x 31/2-13x3 hex cap-partialthread-grade 8-12 point-plain b18.2.1 () () ()6,000
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GLFOH12 Point Flange Screw (CounterBore)Grade 8Plain5/8-11 x 1 3/45/8-11x1-3/4 12 point flange screw-grade 8-plain b18.2.1 () () ()15,000
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GLFOH12 Point Flange Screw (CounterBore)Superalloy (Inconel, Hastelloy, Alloy 20)PlainMS9557-12 b18.2.1 () () ()10,000
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GLFOH12 Point Flange Screw (CounterBore)Grade 8Plain7/16-20 x 1 1/47/16-20x1-1/4 12-pt flange bolt grade 8 stl pln b18.2.1 ()2,000
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 2 1/45/16-24 x 2-1/4 12 point flange bolt b18.2.1732
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 3 1/23/4-10x3-1/2 12 point counterbore bolt b18.2.120
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 1 1/23/4-10x1-1/2 12 point counterbore bolt b18.2.1197
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 13/8-16x1 12 pt counterbore bolt b18.2.150
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 2 1/43/8-24 x 2 1/4 (12 point) counterbore b18.2.1974
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain1 1/8-7 x 4 1/21-1/8-7x4-1/2 12 pt counterbore bolt b18.2.148
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BHAMAL12 Point Flange Screw (CounterBore)SteelPlain#12-14 x 2#12-14x2 hwh seal drill flange 3pt b18.2.1149750
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain1/4-20 x 1 1/41/4-20 x 1 1/4 12 point cap screw alloy b18.2.1100
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain1/4-20 x 3/41/4-20 x 3/4 12 point cap screw alloy b18.2.175
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain1/4-28 x 1 1/41/4-28 x 1 1/4 12 point cap screw alloy b18.2.1125
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain1/4-28 x 1 1/21/4-28 x 1 1/2 12 point cap screw alloy b18.2.165
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain1/4-28 x 3/41/4-28 x 3/4 12 point cap screw alloy b18.2.120
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 15/16-18 x 1 12 point cap screw alloy b18.2.169
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 1 1/45/16-18 x 1 1/4 12 point cap screw alloy b18.2.150
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 1 3/45/16-18 x 1 3/4 12 point cap screw alloy b18.2.175
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 3/45/16-18 x 3/4 12 point cap screw alloy b18.2.162
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 7/85/16-18 x 7/8 12 point cap screw alloy b18.2.1125
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 15/16-24 x 1 12 point cap screw alloy b18.2.1295
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 1 1/45/16-24 x 1 1/4 12 point cap screw alloy b18.2.1120
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 3/45/16-24 x 3/4 12 point cap screw alloy b18.2.1150
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 7/85/16-24 x 7/8 12 point cap screw alloy b18.2.125
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 13/8-16 x 1 12 point cap screw alloy b18.2.144
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 1 1/23/8-16 x 1 1/2 12 point cap screw alloy b18.2.1111
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 13/8-24 x 1 12 point cap screw alloy b18.2.160
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 1 1/23/8-24 x 1 1/2 12 point cap screw alloy b18.2.172
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 1 3/43/8-24 x 1 3/4 12 point cap screw alloy b18.2.139
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AbabaCA12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 23/8-24 x 2 12 point cap screw alloy b18.2.1100
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain1/2 x 1 1/41/2x1 1/4nc ferry head cap screw b18.2.1100
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/21/2-13x1 1/2 ferry head c/s alloy plain b18.2.1800
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain1/41/4 counterbore # csc55655 b18.2.11
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 15/16-18 x 1 12 pt flange bolts b18.2.19
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 1 1/45/16-18 x 1 1/4 12 pt flange bolts b18.2.1347
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/16-24 x 15/16-24 x 1 12 pt flange bolts b18.2.154
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 1 3/43/8-16 x 1 3/4 12 pt flange bolts b18.2.12
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 4 3/43/8-16 x 4 3/4 12 pt flange bolts b18.2.1104
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/41/2-13 x 1 1/4 12 pt flange bolts b18.2.125
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 2 1/21/2-13 x 2 1/2 12 pt flange bolts b18.2.125
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain1/2-20 x 2 1/21/2-20 x 2 1/2 12 pt flange bolts b18.2.165
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B & K FASTPA12 Point Flange Screw (CounterBore)Grade 8Plain9/16-18 x 1 1/29/16-18 x 1 1/2 12 pt flange bolts gr 8 plain b18.2.11
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/8-11 x 1 3/45/8-11 x 1 3/4 12 pt flange bolts b18.2.144
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/8-18 x 25/8-18 x 2 12 pt flange bolts b18.2.117
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain5/8-18 x 2 1/25/8-18 x 2 1/2 12 pt flange bolts b18.2.128
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B & K FASTPA12 Point Flange Screw (CounterBore)SteelPlain7/8-14 x 47/8-14 x 4 12 pt flange bolts b18.2.11
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General FMI12 Point Flange Screw (CounterBore)Grade 5Plainhf 1/2-13 x 5 dbl hex torque bolt gr 5 b18.2.143035
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General FMI12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 2 3/43/4-10x2.75 12 pt ctbr scr b18.2.1900
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General FMI12 Point Flange Screw (CounterBore)SteelPlain7/8-9 x 4 1/47/8-9 x 4.25 12-pt ctrb scr q29 b18.2.13967
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General FMI12 Point Flange Screw (CounterBore)SteelPlain7/16-20 x 1 1/87/16-20 x 1.125 12-pt ctbr scr b18.2.17029
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General FMI12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 13/8-16 x 1 12 pt ctbr scr b18.2.1529
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General FMI12 Point Flange Screw (CounterBore)Grade 8Plain29-20 x 1.75 12-pt flange scr gr8 q29 b18.2.1900
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General FMI12 Point Flange Screw (CounterBore)SteelPlain7/16-20 x 27/16-20 x 2 12 pt ctbr scr b18.2.1650
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General FMI12 Point Flange Screw (CounterBore)SteelPlain5/8-18 x 1 3/45/8-18 x 1.75 counterbore scr q-29 b18.2.1273
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain3/8-16 x 13/8-16x1 ferry ctrbore cap screw gr8 b18.2.113
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain3/8-24 x 13/8-24x1 ferry ctrbore cap screw gr8 b18.2.150
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain3/4-10 x 43/4-10x4 ferry ctrbore cap screw gr8 b18.2.130
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain5/8-11 x 2 1/45/8-11x2 1/4 ferry ctrbore cap screw gr8 b18.2.115
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain5/8-11 x 2 1/25/8-11x2 1/2 ferry ctrbore cap screw gr8 b18.2.120
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OSSCORI12 Point Flange Screw (CounterBore)Grade 8Plain5/8-11 x 35/8-11x3 ferry ctrbore cap screw gr8 b18.2.117
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain3/8 x 1 1/43/8x1 1/4nc ferry head cap scr b18.2.1100
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 2 1/23/4-10x2 1/2 ferry head c/s 170ksi plain mtrs showing hrc 37-45 and chemistry reqd b18.2.12
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain1/2 x 1 1/21/2x1 1/2nf ferry hd cap screw b18.2.1122
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QFCTX12 Point Flange Screw (CounterBore)SteelPlaincounter bore hss 0.625 1/2sh b18.2.11
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QFCTX12 Point Flange Screw (CounterBore)SteelPlain1-8 x 3 1/21-8x3-1/2 ferry hd cap screw b18.2.136
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THRDFASTFL12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/412 pt counterbore screw b18.2.11
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THRDFASTFL12 Point Flange Screw (CounterBore)SteelPlain5/8-11 x 1 1/412 pt counterbore screw b18.2.11
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain1/4-20 x 7/812 pt counterbore screw b18.2.125
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain1 1/8nf-12x3 12pt counterbore screw b18.2.19
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain11 nf-14x3 12 pt counterbore screw b18.2.11
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 3 1/212 pt counterbore screw b18.2.1266
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/412 pt counterbore screw b18.2.144
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain7/16nf-20x1 12 pt counterbore screw b18.2.150
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 3/412 pt counterbore screw b18.2.181
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain3/4nf-16x3 12 pt counterbore screw b18.2.1110
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain7/16-14 x 1 3/412 pt counterbore screw b18.2.1248
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 312 pt counterbore screw b18.2.1198
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain5/8-11 x 1 1/212 pt counterbore screw b18.2.132
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THRDFASTOK12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/212 pt counterbore screw b18.2.1310
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THRDFASTMS12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 1 1/412 pt counterbore screw b18.2.1204
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain1 1/8nf-12x2 1/2 12 pt counterbore screw b18.2.16
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 1 1/212 pt counterbore screw b18.2.119
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain11 nf-14x3 12 pt counterbore screw b18.2.14
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain5/16-18 x 112 pt counterbore screw b18.2.1340
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THRDFASTAL12 Point Flange Screw (CounterBore)SteelPlain7/16nf-20x3/4 12 pt counterbore screw b18.2.150
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 8q/screw 12pt flange st (xyl) 3/4-10x8 b18.2.113
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 3 1/2screw countrbr 12pt all 3/4-10x3 1/2 b18.2.1712
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 3 1/4screw 12pt flange alloy (pl) 3/4-10x3 1/4 b18.2.1100
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain7/8-9 x 1 3/4screw 12pt flange alloy (pl) 7/8-9x1 3/4 b18.2.162
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 4screw 12pt flange alloy (pl) 3/4-10x4 b18.2.1441
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain7/8-9 x 5screw 12pt flange alloy (pl) 7/8-9x5 b18.2.160
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WSBKY12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 4screw 12pt flange alloy (pl) 3/4-10x4 b18.2.1347
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain1/2-20 x 11/2-20 x 1 12 point flange bolt alloy plain b18.2.130
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/4-16 x 2 3/43/4-16 x 2 3/4 12 point flange bolt plain b18.2.1115
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 2 1/43/8-16 x 2 1/4 12 point flange bolt plain b18.2.189
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 1 1/43/8-16 x 1 1/4 12 point flange bolt plain b18.2.150
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/4-16 x 3 1/23/4-16 x 3 1/2 12 point flange bolt plain b18.2.134
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain5/8-18 x 4 1/25/8-18 x 4-1/2 12 point flange bolt plain b18.2.11
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 2 3/43/4-10 x 2 3/4 12 point flange bolt plain b18.2.1177
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain7/16-20 x 1 1/47/16-20 x 1 1/4 12 point flange bolt plain b18.2.1389
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/4-10 x 1 1/23/4-10 x 1 1/2 12 point flange bolt plain b18.2.1160
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/4-16 x 2 1/43/4-16 x 2 1/4 12 point flange bolt plain b18.2.112
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-24 x 2 1/43/8-24 x 2 1/4 12 point flange bolt plain b18.2.1142
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain1/2-13 x 21/2-13 x 2 12 point flange bolt plain b18.2.133
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain1-8 x 5 3/41-8 x 5 3/4 12 point flange bolt plain-3 way cross drilled head b18.2.1180
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain1/4-20 x 2 1/21/4-20 x 2-1/2 12 point flange bolt plain b18.2.1149
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 43/8-16 x 4 12 point flange bolt plain b18.2.182
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain5/8-11 x 3 1/25/8-11 x 3-1/2 12 point flange bolt plain b18.2.123
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 4 1/23/8-16 x 4-1/2 12 point flange bolt plain b18.2.1331
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain7/16-14 x 17/16-14 x 1 12 point flange bolt plain b18.2.155
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain3/8-16 x 23/8-16 x 2 12 point flange bolt b18.2.154
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All SizeTX12 Point Flange Screw (CounterBore)SteelPlain5/8-11 x 15/8-11 x 1 12 point flange bolt plain b18.2.118
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