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Hex Cap Screw ASME B18.2.1

The standard inch hex head screw, with a washer face under the head that spreads clamping force and protects the mating surface. Its tighter tolerances than an inch hex bolt suit machinery and assemblies that need a precise, uniform bearing surface. Install with a standard hex wrench or socket.

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

1/4-20 UNCCarbon Steel96 variantsF0.438max.H0.163max.G0.488min.Basic Major Diameter0.25
LengthinGradeFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1/2Grade 5Zinc PlatedIn stock1,0005.78
1/2Grade 5BlackenedIn stock1,0005.75
1/2Grade 5PlainIn stock1,0005.75
1/2Grade 8Zinc PlatedIn stock1,0005.78
1/2Grade 8BlackenedIn stock1,0005.75
1/2Grade 8PlainIn stock1,0005.75
5/8Grade 5Zinc PlatedIn stock1,0006.38
5/8Grade 5BlackenedIn stock1,0006.35
5/8Grade 5PlainIn stock1,0006.35
5/8Grade 8Zinc PlatedIn stock1,0006.38
5/8Grade 8BlackenedIn stock1,0006.35
5/8Grade 8PlainIn stock1,0006.35
3/4Grade 5Zinc PlatedIn stock1,0006.98
3/4Grade 5BlackenedIn stock1,0006.94
3/4Grade 5PlainIn stock1,0006.94
3/4Grade 8Zinc PlatedIn stock1,0006.98
3/4Grade 8BlackenedIn stock1,0006.94
3/4Grade 8PlainIn stock1,0006.94
7/8Grade 5Zinc PlatedIn stock1,0007.77
7/8Grade 5BlackenedIn stock1,0007.73
7/8Grade 5PlainIn stock1,0007.73
7/8Grade 8Zinc PlatedIn stock1,0007.77
7/8Grade 8BlackenedIn stock1,0007.73
7/8Grade 8PlainIn stock1,0007.73
1Grade 5Zinc PlatedIn stock1,0008.57
1Grade 5BlackenedIn stock1,0008.52
1Grade 5PlainIn stock1,0008.52
1Grade 8Zinc PlatedIn stock1,0008.57
1Grade 8BlackenedIn stock1,0008.52
1Grade 8PlainIn stock1,0008.52
1-1/8Grade 5Zinc PlatedIn stock1,0009.36
1-1/8Grade 5BlackenedIn stock1,0009.31
1-1/8Grade 5PlainIn stock1,0009.31
1-1/8Grade 8Zinc PlatedIn stock1,0009.36
1-1/8Grade 8BlackenedIn stock1,0009.31
1-1/8Grade 8PlainIn stock1,0009.31
1-1/4Grade 5Zinc PlatedIn stock1,00010.15
1-1/4Grade 5BlackenedIn stock1,00010.10
1-1/4Grade 5PlainIn stock1,00010.10
1-1/4Grade 8Zinc PlatedIn stock1,00010.15
1-1/4Grade 8BlackenedIn stock1,00010.10
1-1/4Grade 8PlainIn stock1,00010.10
1-3/8Grade 5Zinc PlatedIn stock1,00010.94
1-3/8Grade 5BlackenedIn stock1,00010.89
1-3/8Grade 5PlainIn stock1,00010.89
1-3/8Grade 8Zinc PlatedIn stock1,00010.94
1-3/8Grade 8BlackenedIn stock1,00010.89
1-3/8Grade 8PlainIn stock1,00010.89
1-1/2Grade 5Zinc PlatedIn stock1,00011.74
1-1/2Grade 5BlackenedIn stock1,00011.68
1-1/2Grade 5PlainIn stock1,00011.68
1-1/2Grade 8Zinc PlatedIn stock1,00011.74
1-1/2Grade 8BlackenedIn stock1,00011.68
1-1/2Grade 8PlainIn stock1,00011.68
1-3/4Grade 5Zinc PlatedIn stock1,00013.32
1-3/4Grade 5BlackenedIn stock1,00013.26
1-3/4Grade 5PlainIn stock1,00013.26
1-3/4Grade 8Zinc PlatedIn stock1,00013.32
1-3/4Grade 8BlackenedIn stock1,00013.26
1-3/4Grade 8PlainIn stock1,00013.26
2Grade 5Zinc PlatedIn stock1,00014.91
2Grade 5BlackenedIn stock1,00014.84
2Grade 5PlainIn stock1,00014.84
2Grade 8Zinc PlatedIn stock1,00014.91
2Grade 8BlackenedIn stock1,00014.84
2Grade 8PlainIn stock1,00014.84
2-1/4Grade 5Zinc PlatedIn stock1,00016.49
2-1/4Grade 5BlackenedIn stock1,00016.42
2-1/4Grade 5PlainIn stock1,00016.42
2-1/4Grade 8Zinc PlatedIn stock1,00016.49
2-1/4Grade 8BlackenedIn stock1,00016.42
2-1/4Grade 8PlainIn stock1,00016.42
2-1/2Grade 5Zinc PlatedIn stock1,00018.08
2-1/2Grade 5BlackenedIn stock1,00017.99
2-1/2Grade 5PlainIn stock1,00017.99
2-1/2Grade 8Zinc PlatedIn stock1,00018.08
2-1/2Grade 8BlackenedIn stock1,00017.99
2-1/2Grade 8PlainIn stock1,00017.99
2-3/4Grade 5Zinc PlatedIn stock1,00019.66
2-3/4Grade 5BlackenedIn stock1,00019.57
2-3/4Grade 5PlainIn stock1,00019.57
2-3/4Grade 8Zinc PlatedIn stock1,00019.66
2-3/4Grade 8BlackenedIn stock1,00019.57
2-3/4Grade 8PlainIn stock1,00019.57
3Grade 5Zinc PlatedIn stock1,00021.25
3Grade 5BlackenedIn stock1,00021.15
3Grade 5PlainIn stock1,00021.15
3Grade 8Zinc PlatedIn stock1,00021.25
3Grade 8BlackenedIn stock1,00021.15
3Grade 8PlainIn stock1,00021.15
3-1/4Grade 5Zinc PlatedIn stock1,00022.83
3-1/4Grade 5BlackenedIn stock1,00022.73
3-1/4Grade 5PlainIn stock1,00022.73
3-1/4Grade 8Zinc PlatedIn stock1,00022.83
3-1/4Grade 8BlackenedIn stock1,00022.73
3-1/4Grade 8PlainIn stock1,00022.73
Need another length in 1/4-20 UNC?Made to order · ask for a price
5/16-18 UNCCarbon Steel108 variantsF0.5max.H0.211max.G0.557min.Basic Major Diameter0.3125
LengthinGradeFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
5/8Grade 5Zinc PlatedIn stock1,00010.56
5/8Grade 5BlackenedIn stock1,00010.51
5/8Grade 5PlainIn stock1,00010.51
5/8Grade 8Zinc PlatedIn stock1,00010.56
5/8Grade 8BlackenedIn stock1,00010.51
5/8Grade 8PlainIn stock1,00010.51
3/4Grade 5Zinc PlatedIn stock1,00011.53
3/4Grade 5BlackenedIn stock1,00011.48
3/4Grade 5PlainIn stock1,00011.48
3/4Grade 8Zinc PlatedIn stock1,00011.53
3/4Grade 8BlackenedIn stock1,00011.48
3/4Grade 8PlainIn stock1,00011.48
7/8Grade 5Zinc PlatedIn stock1,00012.50
7/8Grade 5BlackenedIn stock1,00012.44
7/8Grade 5PlainIn stock1,00012.44
7/8Grade 8Zinc PlatedIn stock1,00012.50
7/8Grade 8BlackenedIn stock1,00012.44
7/8Grade 8PlainIn stock1,00012.44
1Grade 5Zinc PlatedIn stock1,00013.73
1Grade 5BlackenedIn stock1,00013.68
1Grade 5PlainIn stock1,00013.68
1Grade 8Zinc PlatedIn stock1,00013.73
1Grade 8BlackenedIn stock1,00013.68
1Grade 8PlainIn stock1,00013.68
1-1/8Grade 5Zinc PlatedIn stock1,00014.97
1-1/8Grade 5BlackenedIn stock1,00014.91
1-1/8Grade 5PlainIn stock1,00014.91
1-1/8Grade 8Zinc PlatedIn stock1,00014.97
1-1/8Grade 8BlackenedIn stock1,00014.91
1-1/8Grade 8PlainIn stock1,00014.91
1-1/4Grade 5Zinc PlatedIn stock1,00016.21
1-1/4Grade 5BlackenedIn stock1,00016.14
1-1/4Grade 5PlainIn stock1,00016.14
1-1/4Grade 8Zinc PlatedIn stock1,00016.21
1-1/4Grade 8BlackenedIn stock1,00016.14
1-1/4Grade 8PlainIn stock1,00016.14
1-3/8Grade 5Zinc PlatedIn stock1,00017.45
1-3/8Grade 5BlackenedIn stock1,00017.38
1-3/8Grade 5PlainIn stock1,00017.38
1-3/8Grade 8Zinc PlatedIn stock1,00017.45
1-3/8Grade 8BlackenedIn stock1,00017.38
1-3/8Grade 8PlainIn stock1,00017.38
1-1/2Grade 5Zinc PlatedIn stock1,00018.68
1-1/2Grade 5BlackenedIn stock1,00018.61
1-1/2Grade 5PlainIn stock1,00018.61
1-1/2Grade 8Zinc PlatedIn stock1,00018.68
1-1/2Grade 8BlackenedIn stock1,00018.61
1-1/2Grade 8PlainIn stock1,00018.61
1-3/4Grade 5Zinc PlatedIn stock1,00021.16
1-3/4Grade 5BlackenedIn stock1,00021.08
1-3/4Grade 5PlainIn stock1,00021.08
1-3/4Grade 8Zinc PlatedIn stock1,00021.16
1-3/4Grade 8BlackenedIn stock1,00021.08
1-3/4Grade 8PlainIn stock1,00021.08
2Grade 5Zinc PlatedIn stock1,00023.63
2Grade 5BlackenedIn stock1,00023.54
2Grade 5PlainIn stock1,00023.54
2Grade 8Zinc PlatedIn stock1,00023.63
2Grade 8BlackenedIn stock1,00023.54
2Grade 8PlainIn stock1,00023.54
2-1/4Grade 5Zinc PlatedIn stock1,00026.11
2-1/4Grade 5BlackenedIn stock1,00026.01
2-1/4Grade 5PlainIn stock1,00026.01
2-1/4Grade 8Zinc PlatedIn stock1,00026.11
Need another length in 5/16-18 UNC?Made to order · ask for a price

858 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–7/8-9UNCSteel Flat Washer ASTM F844 ASME B18.21.1Inch Flat WasherASME B18.21.1 · 1/4N–7/8W

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

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