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1/4 Thumb Screws (ASME B18. 6.8)

Plain Thumb Screws can either have a round knurled head or a spade head and are designed to be tightened by hand. Plain thumb screws are also referred to as Type P Thumb Screws.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20 x 1 thmb screw stl znc b18.6.8720
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 31/4-20 x 3 thmb screw stl znc b18.6.8430
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 thmb screw stl znc b18.6.82058
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AbabaCAThumb Screw (Plain)AluminumPlain1/4-201/4-20 knurled knob w/o set screw per print alum b18.6.8200
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AbabaCAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20 x 1 thmb screw s/s b18.6.850
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AbabaCAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/21/4-20 x 1 1/2 thmb screw s/s b18.6.850
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1 1/21/4-20 x 1 1/2 thmb screw stl znc b18.6.8644
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AbabaCAThumb Screw (Plain)Nylon (Polyamide)Plain1/4-20 x 3/41/4-20 x 3/4 knurled thumb screw black nylon b18.6.8650
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 3/41/4-20 x 3/4 thmb screw stl znc b18.6.818
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GLFOHThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20x1 thumb screw 18-8 s/s b18.6.8 () () ()792
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GLFOHThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20x1 thumb screw type p stl zc b18.6.8 () () ()99
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GLFOHThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20x1/2 thumb screw type p stl zc b18.6.8 () () ()1000
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GLFOHThumb Screw (Plain)SteelZinc/Clear1/4-20 x 21/4-20x2 thumb screw stl zc b18.6.8 () () ()374
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GLFOHThumb Screw (Plain)SteelZinc/Clear1/4-20 x 31/4-20x3 thumb screw type p stl zc b18.6.8 () () ()197
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ASMCILThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20x1 coarse thumb screw type-b no shoulder ss18-8 b18.6.8500
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GLFOHThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20x1/2 thumb screw-type-b-no shoulder-zinc-cr3 b18.6.8 () ()500
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20 x 1 thmb screw stl znc b18.6.8100
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AbabaCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 thmb screw stl znc b18.6.8300
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JET FITTINGCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20x1/2 thumb screw type-b no shoulder zinc b18.6.81300
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JET FITTINGCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 3/41/4-20x3/4 thumb screw type-b no shld zn b18.6.8500
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 3/8screw thumb type-b 1/4-20x3/8 black oxide and wax JET 416C06TSB SBOWR b18.6.81182
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JET FITTINGCAThumb Screw (Plain)SteelPlain1/4-20 x 21/4-20x2 thumb screw type- b18.6.8280
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1/2screw thumb type-b 1/4-20x1/2 black oxide and wax 1408TB b18.6.8527
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StandardMAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20x1 thumb screw 18-8 stainless steel b18.6.84942
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StandardMAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/41/4-20x1-1/4 thumb screw 18-8 stainless steel b18.6.85667
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StandardMAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/21/4-20x1-1/2 thumb screw 18-8 stainless steel b18.6.8630
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StandardMAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 21/4-20x2 thumb screw 18-8 stainless steel b18.6.8798
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B & K FASTPAThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/21/4-20 x 1 1/2 stainless thumb screws b18.6.8100
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B & K FASTPAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1 1/41/4-20 x 1 1/4 thumb screws type p zinc b18.6.8294
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B & K FASTPAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 21/4-20 x 2 thumb screws type p zinc b18.6.8243
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Marine FastenersFLThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 21/4-20x2 thumb screw ss b18.6.8300
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General FMIThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20x1 slotted knurl scr zn w/m560 b18.6.85,927
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OSSCORIThumb Screw (Plain)SteelBlack Oxide1/4-20 x 11/4-20x1 thumb screw black ox b18.6.8200
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OSSCORIThumb Screw (Plain)SteelPlain1/4-20 x 11/4-20x1 thumb screw b18.6.8415
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OSSCORIThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1 1/41/4-20x1 1/4 thumb screw black ox b18.6.8234
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OSSCORIThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/41/4-20x1 1/4 thumb screw 18-8 304 b18.6.850
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OSSCORIThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1 1/21/4-20x1 1/2 thumb screw black ox b18.6.8503
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OSSCORIThumb Screw (Plain)SteelPlain1/4-20 x 21/4-20x2 thumb screw b18.6.8516
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OSSCORIThumb Screw (Plain)Grade 2Zinc/Black1/4-20 x 1/21/4-20x1/2 thumb screw grade 2 black zinc b18.6.890
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OSSCORIThumb Screw (Plain)Nylon (Polyamide)Plain1/4-20 x 5/81/4-20x5/8 thumb screw nylon b18.6.897
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OSSCORIThumb Screw (Plain)SteelPlain1/4-20 x 31/4-20x3 thumb screw b18.6.8200
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OSSCORIThumb Screw (Plain)SteelBlack Oxide1/4-20 x 3/41/4-20x3/4 thumb screw black ox b18.6.8400
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OSSCORIThumb Screw (Plain)SteelZinc/Clear1/4-20 x 3/41/4-20x3/4 thumb screw plated b18.6.8190
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Bostwick INThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20 x 1 thumb screw w/o shoulder zinc b18.6.890
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 3/8screw thumb type-b 1/420x3/8 black oxide and wax b18.6.8404
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1/2screw thumb type-b 1/420x1/2 black oxide and wax b18.6.8790
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JET FITTINGCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20x1/2 thumb screw type-p steel zinc b18.6.8100
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JET FITTINGCAThumb Screw (Plain)Nylon (Polyamide)Plain1/4-20 x 3/4 6/6scr thumb knurl 1/420x3/4 nylon 6/6 black b18.6.8125
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 3/4screw thumb type-b 1/420x3/4 black oxide and wax b18.6.8500
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JET FITTINGCAThumb Screw (Plain)Nylon (Polyamide)Plain1/4-20 x 11/4-20x1 economy thumb screw nylon 6/6 natural b18.6.8400
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JET FITTINGCAThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1 1/4scr thumb ty-p 1/420x1-1/4 steel black oxide b18.6.8460
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JET FITTINGCAThumb Screw (Plain)SteelZinc/Clear1/4-20 x 2scr thumb ty-p 1/420x2 zp b18.6.8440
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 5/81/4-20 x 5/8 thumb screw type-b zinc b18.6.881
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 3/41/4-20 x 3/4 thumb screw type-b zinc b18.6.8111
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 11/4-20 x 1 thumb screw type-b zinc b18.6.815
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1 1/41/4-20 x 1-1/4 thumb screw type-b zinc b18.6.8100
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1 1/21/4-20 x 1-1/2 thumb screw type-b zinc b18.6.824
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 thumb screw type-b zinc b18.6.894.5
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NBSILThumb Screw (Plain)SteelZinc/Clear1/4-20 x 21/4-20 x 2 thumb screw type-b zinc b18.6.85.1
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JET FITTINGCAThumb Screw (Plain)Nylon (Polyamide)Zinc/Clear1/4-20 x 3/4scr thumb knurl 1/420x3/4 nyl rohs compliant b18.6.81250
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THRDFASTFLThumb Screw (Plain)SteelPlain1/4-20 x 1thumb b18.6.811
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THRDFASTOKThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1 1/4thumb b18.6.8307
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THRDFASTTNThumb Screw (Plain)SteelBlack Oxide1/4-20 x 1thumb b18.6.8690
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KBSTNThumb Screw (Plain)SteelPlain1/4-20 x 11/4-20 x 1 type p or b thumbscrew b18.6.84,430
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THRDFASTMSThumb Screw (Plain)SteelZinc/Clear1/4-20 x 1thumb b18.6.813
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THRDFASTMSThumb Screw (Plain)SteelZinc/Clear1/4-20 x 3/4thumb b18.6.830
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THRDFASTFLThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/418-8 ss thumb b18.6.8444
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WSBKYThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide1/4-20 x 3/4screw thumb (18-8) black 1/4-20x3/4 b18.6.8851
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FACCAOntThumb Screw (Plain)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/4thumb screw without shoulder 1/4-20 unc x 3/4 18-8 stainless steel b18.6.82,000
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