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#4 Thread Cutting Screws (ASME B18. 6.4)

Thread Cutting Screws are a type of screw with a specific hardness, thread design, and point that can cut new threads in a pre-drilled hole in thicker metal. They come with a variety of different point types depending on the application.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 5/84-40 x 5/8 pan phillips thread cutting screw type-f 18-8 ss b18.6.410254
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 3/164-40 x 3/16 pan phillips type-f tcs steel zinc triv clear b18.6.42500
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 1/44-40 x 1/4 pan phil type-f t/c/s zinc trivalent b18.6.42000
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 3/44-40 x 3/4 pan phillips type-f thread cutting screw 18-8 ss b18.6.4994
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 3/16#4 x 3/16 pan phil type-25 trivalent zinc clear b18.6.427800
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 5/16#4 x 5/16 type-25 pan phil t/c/s trivalent zinc clear b18.6.431500
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1/44 x 1/4 pan phil type-25 trivalent zinc clear b18.6.42000
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1/24 x 1/2 type-25 thread cutting screw stainless steel b18.6.4 340
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 3/8#4 x 3/8 pan phil type-25 trivalent zinc clear b18.6.45600
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 5/164 x 5/16 pan phillips threadcutt screw type-25 stainless steel b18.6.41000
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 1/44-40x1/4 flat undercut phillips thread cutting screw type-f steel zinc plated b18.6.45845
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Irwin IndOntSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 5/164-40x5/16 flat undercut phillips type-f thread cutting screw steel zinc plated b18.6.418228
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AbabaCASelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 14-40 x 1 p-flat m-scr w/patch s/s b18.6.41283
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AbabaCASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelBlack Oxide#4-40 x 1/44-40 x 1/4 p-flat m-scr stl blk ox wax b18.6.49900
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AbabaCASelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1 1/24-40 x 1 1/2 p-flat m-scr w/patch s/s b18.6.4800
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 2 x 0.355screwlock kit females/s passivated4-40 x 2-56 x 0.355 in b18.6.4500
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 2 x 0.390screwlock kit female [rohs]s/s passivated#4-40 x 2-56 x 0.390 in b18.6.473
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 0.187screw flat top pan head t6s/s passivated# 4-40 x 0.187 in b18.6.4137009
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 3/16screw fillister head phillips-recesss/s passivated# 4-40 x 3/16 in b18.6.421900
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 1/4screw fillister head phillips-recesssteel yellow zn unc 2a# 4-40 x 1/4 in b18.6.428629
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 3/8screw fillister head slotteds/s passivated unc 2a#4-40 x 3/8 in. b18.6.422438
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 3/8screw fillister head phillips-recesssteel clear zinc# 4-40 x 3/8 in b18.6.412532
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 1/4screw fillister head phillips-recesss/s passivated unc 2a# 4-40 x 1/4 in b18.6.442679
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 1/2screw fillister head slotted recesss/s 300 series passivated#4-40 x 1/2 in b18.6.452600
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 0 1/230screw flat fillister head slots/s passivated#4-40 x 0.530 in b18.6.44000
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.615screw fillister head slottedsteel yellow trivalent#4-40 x 0.615 in [rohs] b18.6.413154
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 5/8screw fillister head slotted recesss/s 300 series passivated#4-40 x 5/8 in b18.6.4250
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 1screw pan head slottedsteel yellow zn# 4-40 x 1 in b18.6.481083
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 1screw binder head phillips-recesss/s passivated unc 2a# 4-40 x 1 in b18.6.4139800
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 1screw pan head phillips recesss/s passivated with poly-lok#4-40 x 1 in b18.6.450
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 1screw pan head phillips-recesssteel blue zn# 4-40 x 1 in. b18.6.479996
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)Nylon (Polyamide)Plain#4-40 x 1screw pan head slottednylon natural# 4-40 x 1 in b18.6.4662
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)Nylon (Polyamide)Plain#4-40 x 1 1/4screw binder head slot recessnylon natural# 4-40 x 1 1/4 in b18.6.425864
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 5/16screw fillister head phillips-recesss/s passivated unc 2a# 4-40 x 5/16 in b18.6.426740
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EximS'poreSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 0.187screw truss head pozidrivs/s passivated w. fl round washer unc 2a# 4-40 x 0.187 in b18.6.4103060
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CresMfgCTSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1/44-40 x 1/4 ph flat 82 ss dfars (ifi rev 9) 440x1/4p82ss b18.6.437,800
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CresMfgCTSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x 1/2624-40 x .562 ph flat 100 ss passivate ams2700 method 1 class 4 dfars (rev v) 2504188-133 b18.6.428,200
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CresMfgCTSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-24 x 1/44-24 x .250 ph truss b ss passivate ams2700 method 1 class 4 dfars (ifi rev 9) 4x1/4ptbss b18.6.410,500
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CresMfgCTSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40 x .4374-40 x .437 ph flat 100 ss passivate ams2700 method 1 class 4 dfars (rev 4) 089-06008-0007 b18.6.42,000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelCadmium#4 x 5/16#4x5/16 hex washer head t/s type-25 cad b18.6.42818
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 5/16#4x5/16 phil flat t/s type-25 18-8 b18.6.42500
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelPlain#4 x 3/8#4x3/8 phil flat tapping screw type-25 b18.6.44869
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1/2#4x1/2 phil flat t/s type-25 302 stnlss b18.6.46680
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1/2#4x1/2 phil pan t/s type-25 18-8 s/s b18.6.41580
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelPlain#4-24 x 1/24-24x1/2 flat phillips h-l black b18.6.4418002
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.2204-40x0.220 fillister slotted undercut retainer screw .0002-.0004 zinc yellow trivalent chromate b18.6.4879981
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.2204-40x0.220 fillister slotted undercut retainer screw .0002-.0004 zinc yellow trivalent chromate b18.6.445000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.2004-40x0.200 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc yellow trivalent must gage 3a after plate b18.6.44
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.2004-40x0.200 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc yellow trivalent must gage 3a after plate b18.6.4118095
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 0.4004-40x0.400 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc clear trivalent b18.6.41961050
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 0.3004-40x0.300 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc clear trivalent b18.6.4306676
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 0.3004-40x0.300 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc clear trivalent b18.6.4759070
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 0.2204-40x0.220 fillister slotted undercut retainer screw .0002-.0004 zinc clear trivalent chromate b18.6.4238800
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-40 x 0.4004-40x0.400 fillister head slotted undercut retainer screw steel 0.0002-0.0004 zinc yellow b18.6.469450
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TXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-24 x 5/164-24x5/16 phil pan type-25 tcs 18-8 s/s b18.6.41000
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1/4#4 x 1/4 phillips flat hd s m s undercut zinc b18.6.47676
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1/2#4 x 1/2 phillips flat hd s m s zinc b18.6.439976
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 3/4#4 x 3/4 phillips flat hd s m s zinc b18.6.413037
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 2#4 x 2 phil flat s m s zinc b18.6.4610
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1#4 x 1 phillips pan hd s m s zinc b18.6.412090
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 3/4#4 x 3/4 phil flat s m s 18-8 stailess b18.6.4200
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1#4 x 1 phil oval s m s 18-8 stainless b18.6.41500
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B & K FASTPASelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1 1/2#4 x 1 1/2 phil pan s m s 18-8 stainless b18.6.4895
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OSSCORISelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1 1/2#4x1 1/2 phil pan s/m/s plated b18.6.45,996
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-24 x 5/164-24 x 5/16 slotted pan thread cutting screw type-25 fully threaded zinc b18.6.45000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelPlain#4 x 1#4 x 1 pan phil type-25 ful thread cut b18.6.449334
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1#4 x 1 phil pan t/s zinc b18.6.410470
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelPlain#4 x 1/4#4 x 1/4 phil flat tapping screw type-25 b18.6.44000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 5/16#4 x 5/16 phil pan t/s ty 25 18-8 s/s b18.6.46000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 3/8#4 x 3/8 phil fill t/s ty 25 18-8 s/s b18.6.432920
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 3/8#4x3/8 phil pan t/s type-25 302 stainles b18.6.413000
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 3/4#4 x 3/4 phil fillister t/s type-25 188 b18.6.48440
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QFCTXSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 5/8#4 x 5/8 phil pan t/s ty 25 18-8 s/s b18.6.414800
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TPCINSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelPhosphate#4 x 5/16pan phillips type-25 black ansi b18.6.4999000
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TPCINSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4 x 1/2pan phillips type type-bf ansi b18.6.4999000
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TPCINSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Yellow#4-24 x 5/8pan phillips type-25 ansi b18.6.4999000
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THRDFASTFLSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1slotted pan t/s b18.6.4600
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THRDFASTFLSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1 1/418-8 ss slotted pan t/s b18.6.4184
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THRDFASTFLSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1phil flat t/s b18.6.4100
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THRDFASTFLSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1phil pan t/s b18.6.4100
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THRDFASTFLSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4 x 1phil pan t/s b18.6.4100
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THRDFASTTNSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 1 1/418-8 ss phil flat t/s b18.6.4585
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THRDFASTMSSelf-Tapping Thread Cutting Screw (types f,1,23,25)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 118-8 ss phil pan t/s b18.6.436
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KBSTNSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 1/24-40 x 1/2 indhexwshr t/c f slotted pltd b18.6.49,000
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KBSTNSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 1/24-40 x 1/2 pan sl t/c screw-type-25-plated b18.6.45,000
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KBSTNSelf-Tapping Thread Cutting Screw (types f,1,23,25)SteelZinc/Clear#4-40 x 3/164-40 x 3/16 pan sl t/c screw type-f plated b18.6.410,000
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