Square Head Set Screws, also called a Square Head Grub Screws are screws with a square head usually smaller than the diameter of the screw, designed to hold one object against another object, usually without requiring a nut. Commonly used to secure a shaft against a pulley.

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SupplierLocTypeMaterialFinishSizeDescriptionQty
Set ScrewILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1/2cup point square set clear & bakeinquire
Set ScrewILSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1/2cup point 18-8 304 square setinquire
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 5/8cup point square set case hardenedinquire
Search results presented by Set Screw & Mfg. Co., your source for Square Set Screws. For more results, visit setscrewmfg.com
 
SupplierLocTypeMaterialFinishSizeDescriptionQty
Set ScrewILSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 5/8cup point case hardened square set & yellow plateinquire
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 5/8knurled cup point case hardened square setinquire
Set ScrewILSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 5/8cup point 18-8 304 square setinquire
Set ScrewILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 5/8square set cup point case hardenedinquire
Set ScrewILSet Screw (Square Head)316, 317, A4 StainlessPlain5/16-18 x 5/8cup point (316) stainless square setinquire
Set ScrewILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4cup point case hardened square setinquire
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 3/4knurled cup point case hardened square setinquire
Set ScrewILSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3/4cup point 18-8 304 square setinquire
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 3/4cup point not hardened square setinquire
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 7/8square set cup point case hardened1800
Set ScrewILSet Screw (Square Head)SteelPlain5/16-18 x 1cup point case hardened square set nylon patchinquire
Set ScrewILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1cup point low carbon case hard square setinquire
Set ScrewILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1cup point low carbon case hard square set nylon patchinquire
MFSKSSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 3/8square cup point157
ManscoMISet Screw (Square Head)SteelPlain5/16-18 x 3/8sq set scr 100/box200
NorthernMNSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/8s/o 5/16-18x3/8 sq hd set zinc75
TownCountryARSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1/2square set1000
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup pt69
Wurth AdaMNSet Screw (Square Head)SteelPlain5/16-18 x 1/2scr set square cp alloy 5/16-18x1/23,150
Wurth AdaMNSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 1/2scr set square cp charound (zy) 5/16-18x1/2871
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 1/2nc square set hard pl19
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup pt b18.6.297
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup point100
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup pt b18.6.225
MFSKSSet Screw (Square Head)SteelPlain5/16-18 x 1/2square cup point258
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup pt279
KomarILSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set -cup pt nylon patch12,600
Future FastenerTXSet Screw (Square Head)SteelBlack Oxide5/16-18 x 1/25/16-18 x 1/2 square head set cup pt blk100
OBRIENOHSet Screw (Square Head)SteelPlain5/16-18 x 1/2square set cup pt nylon patch2460
NorthernMNSet Screw (Square Head)SteelPlain5/16-18 x 1/2s/o 5/16-18x1/2 sq hd set plain1100
CNBILSet Screw (Square Head)SteelPlain5/16-18 x 1/2square50
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 1/25/16-18 x 1/2 square head set screw39
FasSpcMfgFLSet Screw (Square Head)316, 317, A4 StainlessPlain5/16-18 x 1/2square set cup point 316 stainless26
BHAMALSet Screw (Square Head)SteelPlain5/16-18 x 1/25/16-18 x 1/2 sq hd set screw b18.6.279
WurthINSet Screw (Square Head)SteelPlain5/16-18 x 1/25/16-18 x 1/2 sqr hd set screw cup pt case hrd zf coating per 705100300 cps 5035/50393,162
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 5/8square set cup pt235
ACCURATEILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 5/8coarse square set scr cup2150
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 5/8nc square set hard pl16
ISSCOMOSet Screw (Square Head)SteelZinc/Clear5/16-18 x 5/8cup point3200
BHAMALSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 5/8square set 300 ser ss6,950
BHAMALSet Screw (Square Head)SteelPlain5/16-18 x 5/8square set100
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 5/8square set cup pt271
FasSpcMfgFLSet Screw (Square Head)Superalloy (Inconel, Hastelloy, Alloy 20)Plain5/16-18 x 5/8square set cup point carpenter 203
WurthINSet Screw (Square Head)SteelPlain5/16-18 x 5/85/16-18 x 5/8 sq hd set screw cup point zf coating per 705100300 cps 5035/50392,600
HayesCASet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3/4square set cup pt 18-8ss91
YANKEENHSet Screw (Square Head)SteelPlain5/16-18 x 3/45/16-18 x 3/4 sq hd set cup pt201
HOUSEFLSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4square set scr zn4,000
Wurth AdaMNSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4scr set square cp charound (zt) 5/16-18x3/4298,019
Wurth AdaMNSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 3/4scr set square cp charound (zy) 5/16-18x3/415,065
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 3/4square cup point set268
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 3/4nc square set hard pl26
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 3/4square set cup pt b18.6.224
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 3/4square set250
WDMBIASet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4sq set cup pt zn-coat k plt8331
MFSKSSet Screw (Square Head)SteelPlain5/16-18 x 3/4square cup point152
ISSCOMOSet Screw (Square Head)SteelPlain5/16-18 x 3/4cup point3700
SRFALSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4square set cup pt827
SISAZSet Screw (Square Head)SteelPlain5/16-18 x 3/4sq set cup pt100
KomarILSet Screw (Square Head)SteelBlack Oxide5/16-18 x 3/4square set -cup pt black ox1,500
Future FastenerTXSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3/45/16-18 x 3/4 square head set screw ss530
LippinCASet Screw (Square Head)SteelPlain5/16-18 x 3/4setscrew square head plainstock
NorthernMNSet Screw (Square Head)SteelZinc/Clear5/16-18 x 3/4s/o 5/16-18x3/4 sq hd set screw zinc458
THRDFASTMSSet Screw (Square Head)SteelPlain5/16-18 x 3/4square set cup pt b18.6.280
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 3/45/16-18 x 3/4 square head set screw981
FasSpcMfgFLSet Screw (Square Head)Ni-Cu Alloy (Monel, K-Monel, etc.)Plain5/16-18 x 3/4square set cup point ni-cu 4001
FasSpcMfgFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3/4square set oval point dwg 303 18-8 304 oval point radius 5/16 drill hole thru 1 set of flats 1/32x45deg1
FasSpcMfgFLSet Screw (Square Head)Superalloy (Inconel, Hastelloy, Alloy 20)Plain5/16-18 x 3/4square set cup point hastelloy c 2762
FasSpcMfgFLSet Screw (Square Head)Silicon BronzePlain5/16-18 x 3/4square set cup point65
FasSpcMfgFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3/45/16-18x3/4 square set cup point 904l 18-8 3043
FasSpcMfgFLSet Screw (Square Head)Silicon BronzePlain5/16-18 x 3/45/16-18x3/4 square set oval point 6552
WSBKYSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 3/4screw set sqr cp chard (zy) 5/16-18x3/4 b18.6.25,088
CenturyFLSet Screw (Square Head)SteelPlain5/16-18 x 7/85/16-18 x 7/8 sq.hd.half dog point5
ISSCOMOSet Screw (Square Head)SteelZinc/Clear5/16-18 x 7/8cup point15100
FastWareSaskSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 7/8nc square cup point set111
HayesCASet Screw (Square Head)316, 317, A4 StainlessPlain5/16-18 x 15/16-18 x 1 sq hd set cup pt t-316589
CIFILSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 1square set ,, yellow, case hardened to 34-44 rc8735
YANKEENHSet Screw (Square Head)SteelPlain5/16-18 x 15/16-18 x 1 sq hd set cup pt150
MESAFASTCASet Screw (Square Head)SteelPlain5/16-18 x 1square set cup pt100.0
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 1square cup point set359
Wurth AdaMNSet Screw (Square Head)SteelZinc/Yellow5/16-18 x 1scr set square cp alloy (zy) 5/16-18x16,542
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 1nc square set hard pl39
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup pt b18.6.2124
THRDFASTFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 118-8 ss square set cup pt b18.6.29
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup point100
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 15/16-18 x 1 square hd set screws cup pt4000
IRFNCSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup pt24200
WDMBIASet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1sq set cup pt 18-8 ss901
MFSKSSet Screw (Square Head)SteelPlain5/16-18 x 1square cup point247
ISSCOMOSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1full dog380
SRFALSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1square set cup pt873
SRFALSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1square set cup pt s/s41
KomarILSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1square set-cup pt 1/2lg nyl patch475
Future FastenerTXSet Screw (Square Head)SteelBlack Oxide5/16-18 x 15/16-18 x 1 square hd set screw blk59
LippinCASet Screw (Square Head)SteelPlain5/16-18 x 1setscrew square head plainstock
THRDFASTMSSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup pt b18.6.2100
FMPMASet Screw (Square Head)SteelPlain5/16-18 x 1square set/s full dog pt.568
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 15/16-18 x 1 square head set screw33
FasSpcMfgFLSet Screw (Square Head)316, 317, A4 StainlessPlain5/16-18 x 1square set cup point 316 stainless735
FasSpcMfgFLSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup point ni-cu2
FasSpcMfgFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 15/16-18x1 square set cup point 904l 18-8 3042
FasSpcMfgFLSet Screw (Square Head)SteelPlain5/16-18 x 1square set cup point rc 45 min158
FastWareSaskSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1nc square set cone point 18.8 ss100
HayesCASet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square set cup pt stl22
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square cup point set347
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 1 1/4nc square set hard pl82
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square set cup pt1000
IRFNCSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square set cup pt1699
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square set cup pt7
CNBILSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square50
FMPMASet Screw (Square Head)SteelZinc/Clear5/16-18 x 1 1/4square set/s cup pt.4300
FMPMASet Screw (Square Head)SteelPlain5/16-18 x 1 1/4square set/s full dog pt.84
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 1 1/45/16-18 x 1 1/4 square head set screw64
FasSpcMfgFLSet Screw (Square Head)Silicon BronzePlain5/16-18 x 1 1/4square set cup point690
WSBKYSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1 1/4screw set sqr cp (18-8) 5/16-18x1 1/4 b18.6.23,547
FastWareSaskSet Screw (Square Head)SteelPlain5/16-18 x 1 1/4nc square set cup point49
HayesCASet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup pt stl42
SunPackFLSet Screw (Square Head)SteelPlain5/16-18 x 1 1/25/16-18 x 1-1/2 alloy steel square hd cup point set screw80
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square cup point set429
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 1 1/2nc square set hard pl24
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup pt b18.6.233
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup pt b18.6.2111
OBRIENOHSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2sq set cup66
IRFNCSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup pt490
WDMBIASet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set150
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup pt1629
SRFALSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1 1/2square set cup pt s/s120
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set 1/2 dog pt pl28
Future FastenerTXSet Screw (Square Head)SteelBlack Oxide5/16-18 x 1 1/25/16-18 x 1-1/2 square hd set screw blk74
LippinCASet Screw (Square Head)SteelPlain5/16-18 x 1 1/2setscrew square head plainstock
IRFNJSet Screw (Square Head)SteelPlain5/16-18 x 1 1/2square set cup point1535
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 1 1/25/16-18 x 1 1/2 square head set screw103
FasSpcMfgFLSet Screw (Square Head)316, 317, A4 StainlessPlain5/16-18 x 1 1/2square set cup point 316 stainless2
ASFCORPMISet Screw (Square Head)SteelPlain5/16-18 x 1 1/25/16-18 x 1 1/2 sq hd set scw cup pt stl case hard pkg50
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 1 3/4square set cup pt88
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 1 3/4nc square set hard pl41
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1 3/4square set cup pt b18.6.2200
AmeriNYSet Screw (Square Head)SteelZinc/Clear5/16-18 x 1 3/4square set cup pt pl1000
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 1 3/4square set cup pt b18.6.225
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 1 3/4square set cup pt137
WDMBIASet Screw (Square Head)SteelPlain5/16-18 x 1 3/4sq set flat pt100
HayesCASet Screw (Square Head)SteelPlain5/16-18 x 2square set cup pt stl59
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 2square set cup pt50
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 2square cup point set302
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 2nc square set hard pl87
AmeriNYSet Screw (Square Head)SteelPlain5/16-18 x 2square set dome point370
SISAZSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 2square cup point set 18-8 304994
KomarILSet Screw (Square Head)SteelPlain5/16-18 x 2square set -cup pt400
LippinCASet Screw (Square Head)SteelPlain5/16-18 x 2setscrew square head plainstock
SWACOOHSet Screw (Square Head)SteelPlain5/16-18 x 25/16-18x2 square hd set sc cup case har1000
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 25/16-18 x 2 square head set screw34
SaskSet Screw (Square Head)SteelPlain5/16-18 x 2nc square set cup point988
SunPackFLSet Screw (Square Head)SteelPlain5/16-18 x 2 1/45/16-18 x 2-1/4 alloy steel square hd cup point set screw80
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 2 1/4nc square set hard pl91
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 2 1/4square set cup pt562
JacksonMSSet Screw (Square Head)SteelPlain5/16-18 x 2 1/4nc square set117
THRDFASTMSSet Screw (Square Head)SteelPlain5/16-18 x 2 1/4square set cup pt b18.6.230
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 2 1/2square set cup pt78
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 2 1/2square cup point set85
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 2 1/2nc square set hard pl44
EFSCOORSet Screw (Square Head)SteelPlain5/16-18 x 2 1/25/16-18 x 2 1/2 square head set screws cup point coarse182
THRDFASTMSSet Screw (Square Head)SteelPlain5/16-18 x 2 1/2square set cup pt b18.6.2100
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 2 1/25/16-18 x 2 1/2 square head set screw30
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 2 3/4square set cup pt81
HayesCASet Screw (Square Head)SteelPlain5/16-18 x 3square set cup pt stl115
METRO INDOHSet Screw (Square Head)SteelPlain5/16-18 x 3square set cup pt49
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 3square cup point set46
THRDFASTFLSet Screw (Square Head)SteelPlain5/16-18 x 3square set cup pt b18.6.238
All SizeTXSet Screw (Square Head)SteelPlain5/16-18 x 35/16-18 x 3 square head set screw b18.6.225
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 3square set cup pt134
NutsBoltsNESet Screw (Square Head)SteelPlain5/16-18 x 35/16-18 x 3 square head set screw992
FasSpcMfgFLSet Screw (Square Head)SteelPlain5/16-18 x 3sqr set flat pt2
ASMCILSet Screw (Square Head)SteelPlain5/16-18 x 3(ft) coarse square set cup pt low carb case hard33
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 3 1/4square set cup pt17
LippinCASet Screw (Square Head)SteelPlain5/16-18 x 13/4setscrew square head plainstock
SRFALSet Screw (Square Head)SteelPlain5/16-18 x 3 1/2square set cup pt40
FasSpcMfgFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/2square set cup point 18-8 s/s98
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 4nc square set hard pl44
FasSpcMfgFLSet Screw (Square Head)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 4square set cup pt 18-8 s/s9
Valley NuWASet Screw (Square Head)SteelPlain5/16-18 x 4 1/2nc square set hard pl74
Future FastenerTXSet Screw (Square Head)SteelBlack Oxide5/16-18 x 4 1/25/16-18 x 4-1/2 square hd set scr blk13
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 5in square set cup pt197
HayesCASet Screw (Square Head)SteelPlain5/16-18 x 6square set cup pt stl13
Bolts PlusOntSet Screw (Square Head)SteelPlain5/16-18 x 6square set23
MidStatesMISet Screw (Square Head)SteelPlain5/16-18 x 6in square set cup pt188
FasSpcMfgFLSet Screw (Square Head)SteelPlain5/16-18 x 7.375sqr set 1/2 dog pt rc 45-502

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