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Cup Point Socket Set Screw ASME B18.3

A headless screw with a thin cup-shaped rim at its tip that concentrates clamping force into a small ring. Tighten it with a hex key so the rim bites into the shaft, holding the collar, pulley or gear against axial and rotational movement. Used where a hub must be locked to a shaft without a protruding head.

In stockShips within 3 working daysMade to orderShips within 15 working days

#6-32 UNCAlloy Steel14 variantsJ0.062Basic Major Diameter0.138TPI32Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/4BlackenedIn stock3,0000.35
1/4PlainIn stock3,0000.35
5/16BlackenedIn stock3,0000.44
5/16PlainIn stock3,0000.44
3/8BlackenedIn stock3,0000.52
3/8PlainIn stock3,0000.52
7/16BlackenedIn stock3,0000.61
7/16PlainIn stock3,0000.61
1/2BlackenedIn stock3,0000.70
1/2PlainIn stock3,0000.70
5/8BlackenedIn stock3,0000.87
5/8PlainIn stock3,0000.87
3/4BlackenedIn stock3,0001.05
3/4PlainIn stock3,0001.05
Need another length in #6-32 UNC?Made to order · ask for a price
#8-32 UNCAlloy Steel16 variantsJ0.078Basic Major Diameter0.164TPI32Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/4BlackenedIn stock3,0000.52
1/4PlainIn stock3,0000.52
5/16BlackenedIn stock3,0000.65
5/16PlainIn stock3,0000.65
3/8BlackenedIn stock3,0000.78
3/8PlainIn stock3,0000.78
7/16BlackenedIn stock3,0000.91
7/16PlainIn stock3,0000.91
1/2BlackenedIn stock3,0001.04
1/2PlainIn stock3,0001.04
5/8BlackenedIn stock3,0001.30
5/8PlainIn stock3,0001.30
3/4BlackenedIn stock3,0001.56
3/4PlainIn stock3,0001.56
7/8BlackenedIn stock3,0001.83
7/8PlainIn stock3,0001.83
Need another length in #8-32 UNC?Made to order · ask for a price
#10-24 UNCAlloy Steel18 variantsJ0.094Basic Major Diameter0.19TPI24Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/4BlackenedIn stock3,0000.67
1/4PlainIn stock3,0000.67
5/16BlackenedIn stock3,0000.84
5/16PlainIn stock3,0000.84
3/8BlackenedIn stock3,0001.01
3/8PlainIn stock3,0001.01
7/16BlackenedIn stock3,0001.17
7/16PlainIn stock3,0001.17
1/2BlackenedIn stock3,0001.34
1/2PlainIn stock3,0001.34
5/8BlackenedIn stock3,0001.68
5/8PlainIn stock3,0001.68
3/4BlackenedIn stock3,0002.01
3/4PlainIn stock3,0002.01
7/8BlackenedIn stock3,0002.35
7/8PlainIn stock3,0002.35
1BlackenedIn stock3,0002.68
1PlainIn stock3,0002.68
Need another length in #10-24 UNC?Made to order · ask for a price
1/4-20 UNCAlloy Steel22 variantsJ0.125Basic Major Diameter0.25TPI20Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/4BlackenedIn stock2,0001.20
1/4PlainIn stock2,0001.20
5/16BlackenedIn stock2,0001.49
5/16PlainIn stock2,0001.49
3/8BlackenedIn stock2,0001.79
3/8PlainIn stock2,0001.79
7/16BlackenedIn stock2,0002.09
7/16PlainIn stock2,0002.09
1/2BlackenedIn stock2,0002.39
1/2PlainIn stock2,0002.39
5/8BlackenedIn stock2,0002.99
5/8PlainIn stock2,0002.99
3/4BlackenedIn stock2,0003.59
3/4PlainIn stock2,0003.59
7/8BlackenedIn stock2,0004.18
7/8PlainIn stock2,0004.18
1BlackenedIn stock2,0004.78
1PlainIn stock2,0004.78
1-1/8BlackenedIn stock2,0005.38
1-1/8PlainIn stock2,0005.38
1-1/4BlackenedIn stock2,0005.98
1-1/4PlainIn stock2,0005.98
Need another length in 1/4-20 UNC?Made to order · ask for a price
5/16-18 UNCAlloy Steel20 variantsJ0.156Basic Major Diameter0.3125TPI18Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
5/16BlackenedIn stock2,0002.41
5/16PlainIn stock2,0002.41
3/8BlackenedIn stock2,0002.89
3/8PlainIn stock2,0002.89
7/16BlackenedIn stock2,0003.38
7/16PlainIn stock2,0003.38
1/2BlackenedIn stock2,0003.86
1/2PlainIn stock2,0003.86
5/8BlackenedIn stock2,0004.82
5/8PlainIn stock2,0004.82
3/4BlackenedIn stock2,0005.79
3/4PlainIn stock2,0005.79
7/8BlackenedIn stock2,0006.75
7/8PlainIn stock2,0006.75
1BlackenedIn stock2,0007.72
1PlainIn stock2,0007.72
1-1/4BlackenedIn stock2,0009.65
1-1/4PlainIn stock2,0009.65
1-1/2BlackenedIn stock2,00011.58
1-1/2PlainIn stock2,00011.58
Need another length in 5/16-18 UNC?Made to order · ask for a price
3/8-16 UNCAlloy Steel20 variantsJ0.188Basic Major Diameter0.375TPI16Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
3/8BlackenedIn stock2,0004.24
3/8PlainIn stock2,0004.24
7/16BlackenedIn stock2,0004.94
7/16PlainIn stock2,0004.94
1/2BlackenedIn stock2,0005.65
1/2PlainIn stock2,0005.65
5/8BlackenedIn stock2,0007.06
5/8PlainIn stock2,0007.06
3/4BlackenedIn stock2,0008.47
3/4PlainIn stock2,0008.47
7/8BlackenedIn stock2,0009.89
7/8PlainIn stock2,0009.89
1BlackenedIn stock2,00011.30
1PlainIn stock2,00011.30
1-1/4BlackenedIn stock2,00014.12
1-1/4PlainIn stock2,00014.12
1-1/2BlackenedIn stock2,00016.95
1-1/2PlainIn stock2,00016.95
1-3/4BlackenedIn stock2,00019.77
1-3/4PlainIn stock2,00019.77
Need another length in 3/8-16 UNC?Made to order · ask for a price
1/2-13 UNCAlloy Steel16 variantsJ0.25Basic Major Diameter0.5TPI13Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/2BlackenedIn stock1,50010.23
1/2PlainIn stock1,50010.23
5/8BlackenedIn stock1,50012.79
5/8PlainIn stock1,50012.79
3/4BlackenedIn stock1,50015.35
3/4PlainIn stock1,50015.35
7/8BlackenedIn stock1,50017.90
7/8PlainIn stock1,50017.90
1BlackenedIn stock1,50020.46
1PlainIn stock1,50020.46
1-1/4BlackenedIn stock1,50025.58
1-1/4PlainIn stock1,50025.58
1-1/2BlackenedIn stock1,50030.69
1-1/2PlainIn stock1,50030.69
1-3/4BlackenedIn stock1,50035.81
1-3/4PlainIn stock1,50035.81
Need another length in 1/2-13 UNC?Made to order · ask for a price
5/8-11 UNCAlloy Steel14 variantsJ0.312Basic Major Diameter0.625TPI11Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
5/8BlackenedIn stock1,00020.23
5/8PlainIn stock1,00020.23
3/4BlackenedIn stock1,00024.27
3/4PlainIn stock1,00024.27
7/8BlackenedIn stock1,00028.32
7/8PlainIn stock1,00028.32
1BlackenedIn stock1,00032.36
1PlainIn stock1,00032.36
1-1/4BlackenedIn stock1,00040.45
1-1/4PlainIn stock1,00040.45
1-1/2BlackenedIn stock1,00048.54
1-1/2PlainIn stock1,00048.54
1-3/4BlackenedIn stock1,00056.63
1-3/4PlainIn stock1,00056.63
Need another length in 5/8-11 UNC?Made to order · ask for a price
3/4-10 UNCAlloy Steel12 variantsJ0.375Basic Major Diameter0.75TPI10Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
3/4BlackenedIn stock1,00035.56
3/4PlainIn stock1,00035.56
7/8BlackenedIn stock1,00041.49
7/8PlainIn stock1,00041.49
1BlackenedIn stock1,00047.41
1PlainIn stock1,00047.41
1-1/4BlackenedIn stock1,00059.27
1-1/4PlainIn stock1,00059.27
1-1/2BlackenedIn stock1,00071.12
1-1/2PlainIn stock1,00071.12
1-3/4BlackenedIn stock1,00082.97
1-3/4PlainIn stock1,00082.97
Need another length in 3/4-10 UNC?Made to order · ask for a price

152 combinations shown

Matching components

Hex Nut ASME B18.2.2Inch Hex NutASME B18.2.2 · 1/4-20UNC–7/8-9UNCHex Jam Nut ASME B18.2.2Inch Hex Jam NutASME B18.2.2 · 1/4-20UNC–7/8-9UNC

Questions

Which set screw point should I use?

Cup point for most shafts; it bites in slightly. Cone point for the firmest hold, seated in a drilled dimple. Flat point where the shaft must not be marked or the screw is adjusted often. Dog point to fit a hole or slot for exact positioning.

Order assurance

Reports & inspection

  • EN 10204 3.1 material certificate
  • Dimensional inspection report
  • Certificate of conformity
  • Mechanical test report
  • Chemical analysis report
  • Coating inspection report
  • Batch and lot traceability

Packaging & delivery

  • Bulk carton packing
  • Small boxes with outer cartons
  • Palletized shipment
  • Fumigation-free pallets
  • Inner poly bags
  • Buyer branding and labels

Related products

Hexagon Socket Set Screw, Cup Point DIN 916Cup Point Set ScrewDIN 916 · M3–M16Cone Point Socket Set Screw ASME B18.3Inch Cone Point Set ScrewASME B18.3 · #6-32UNC, #8-32UNC, #10-24UNC + 6 moreFlat Point Socket Set Screw ASME B18.3Inch Flat Point Set ScrewASME B18.3 · #6-32UNC, #8-32UNC, #10-24UNC + 6 moreHalf Dog Point Socket Set Screw ASME B18.3Inch Half Dog Point Set ScrewASME B18.3 · #6-32UNC, #8-32UNC, #10-24UNC + 5 moreSocket Set Screw Cone Point ISO 4027Cone Point Set ScrewISO 4027 · M3–M12Dog Point Set Screw ISO 4028Dog Point Set ScrewISO 4028 · M3–M12
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