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Carriage Bolt ASME B18.5

A carriage bolt with a square neck that resists turning as the nut is tightened, so installation is done entirely from one side. Tighten with a wrench on the nut; the dome head has no drive recess. Used in timber framing, fencing, decking, and playground equipment. Avoid over-tightening in softwood, which can pull the square neck through the wood.

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

1/4-20 UNCCarbon SteelGrade 536 variantsH0.145max.A0.594max.TPI20Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
3/4Zinc PlatedIn stock1,0007.97
3/4Hot Dip GalvanizedIn stock1,0008.25
3/4PlainIn stock1,0007.92
7/8Zinc PlatedIn stock1,0008.57
7/8Hot Dip GalvanizedIn stock1,0008.87
7/8PlainIn stock1,0008.52
1Zinc PlatedIn stock1,0009.17
1Hot Dip GalvanizedIn stock1,0009.49
1PlainIn stock1,0009.12
1-1/4Zinc PlatedIn stock1,00010.37
1-1/4Hot Dip GalvanizedIn stock1,00010.73
1-1/4PlainIn stock1,00010.31
1-1/2Zinc PlatedIn stock1,00011.57
1-1/2Hot Dip GalvanizedIn stock1,00011.97
1-1/2PlainIn stock1,00011.51
1-3/4Zinc PlatedIn stock1,00012.77
1-3/4Hot Dip GalvanizedIn stock1,00013.21
1-3/4PlainIn stock1,00012.70
2Zinc PlatedIn stock1,00013.98
2Hot Dip GalvanizedIn stock1,00014.45
2PlainIn stock1,00013.90
2-1/4Zinc PlatedIn stock1,00015.18
2-1/4Hot Dip GalvanizedIn stock1,00015.69
2-1/4PlainIn stock1,00015.09
2-1/2Zinc PlatedIn stock1,00016.38
2-1/2Hot Dip GalvanizedIn stock1,00016.93
2-1/2PlainIn stock1,00016.29
2-3/4Zinc PlatedIn stock1,00017.58
2-3/4Hot Dip GalvanizedIn stock1,00018.17
2-3/4PlainIn stock1,00017.48
3Zinc PlatedIn stock1,00018.78
3Hot Dip GalvanizedIn stock1,00019.41
3PlainIn stock1,00018.68
3-1/4Zinc PlatedIn stock1,00019.98
3-1/4Hot Dip GalvanizedIn stock1,00020.65
3-1/4PlainIn stock1,00019.87
Need another length in 1/4-20 UNC?Made to order · ask for a price
5/16-18 UNCCarbon SteelGrade 533 variantsH0.176max.A0.719max.TPI18Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1Zinc PlatedIn stock1,00015.50
1Hot Dip GalvanizedIn stock1,00015.94
1PlainIn stock1,00015.43
1-1/4Zinc PlatedIn stock1,00017.44
1-1/4Hot Dip GalvanizedIn stock1,00017.92
1-1/4PlainIn stock1,00017.36
1-1/2Zinc PlatedIn stock1,00019.38
1-1/2Hot Dip GalvanizedIn stock1,00019.91
1-1/2PlainIn stock1,00019.29
1-3/4Zinc PlatedIn stock1,00021.32
1-3/4Hot Dip GalvanizedIn stock1,00021.90
1-3/4PlainIn stock1,00021.22
2Zinc PlatedIn stock1,00023.25
2Hot Dip GalvanizedIn stock1,00023.88
2PlainIn stock1,00023.15
2-1/4Zinc PlatedIn stock1,00025.19
2-1/4Hot Dip GalvanizedIn stock1,00025.87
2-1/4PlainIn stock1,00025.08
2-1/2Zinc PlatedIn stock1,00027.13
2-1/2Hot Dip GalvanizedIn stock1,00027.86
2-1/2PlainIn stock1,00027.01
2-3/4Zinc PlatedIn stock1,00029.07
2-3/4Hot Dip GalvanizedIn stock1,00029.84
2-3/4PlainIn stock1,00028.94
3Zinc PlatedIn stock1,00031.00
3Hot Dip GalvanizedIn stock1,00031.83
3PlainIn stock1,00030.87
3-1/2Zinc PlatedIn stock1,00034.88
3-1/2Hot Dip GalvanizedIn stock1,00035.80
3-1/2PlainIn stock1,00034.73
4Zinc PlatedIn stock1,00038.76
4Hot Dip GalvanizedIn stock1,00039.77
4PlainIn stock1,00038.59
Need another length in 5/16-18 UNC?Made to order · ask for a price
3/8-16 UNCCarbon SteelGrade 542 variantsH0.208max.A0.844max.TPI16Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1-1/4Zinc PlatedIn stock1,00026.78
1-1/4Hot Dip GalvanizedIn stock1,00027.41
1-1/4PlainIn stock1,00026.68
1-1/2Zinc PlatedIn stock1,00029.62
1-1/2Hot Dip GalvanizedIn stock1,00030.30
1-1/2PlainIn stock1,00029.51
1-3/4Zinc PlatedIn stock1,00032.45
1-3/4Hot Dip GalvanizedIn stock1,00033.19
1-3/4PlainIn stock1,00032.33
2Zinc PlatedIn stock1,00035.29
2Hot Dip GalvanizedIn stock1,00036.08
2PlainIn stock1,00035.16
2-1/4Zinc PlatedIn stock1,00038.12
2-1/4Hot Dip GalvanizedIn stock1,00038.98
2-1/4PlainIn stock1,00037.98
2-1/2Zinc PlatedIn stock1,00040.95
2-1/2Hot Dip GalvanizedIn stock1,00041.87
2-1/2PlainIn stock1,00040.80
2-3/4Zinc PlatedIn stock1,00043.79
2-3/4Hot Dip GalvanizedIn stock1,00044.76
2-3/4PlainIn stock1,00043.63
3Zinc PlatedIn stock1,00046.62
3Hot Dip GalvanizedIn stock1,00047.65
3PlainIn stock1,00046.45
3-1/4Zinc PlatedIn stock1,00049.46
3-1/4Hot Dip GalvanizedIn stock1,00050.55
3-1/4PlainIn stock1,00049.28
3-1/2Zinc PlatedIn stock1,00052.29
3-1/2Hot Dip GalvanizedIn stock1,00053.44
3-1/2PlainIn stock1,00052.10
3-3/4Zinc PlatedIn stock1,00055.12
3-3/4Hot Dip GalvanizedIn stock1,00056.33
3-3/4PlainIn stock1,00054.93
4Zinc PlatedIn stock1,00057.96
4Hot Dip GalvanizedIn stock1,00059.22
4PlainIn stock1,00057.75
4-1/2Zinc PlatedIn stock1,00063.63
4-1/2Hot Dip GalvanizedIn stock1,00065.01
4-1/2PlainIn stock1,00063.40
5Zinc PlatedIn stock1,00069.29
5Hot Dip GalvanizedIn stock1,00070.79
5PlainIn stock1,00069.05
Need another length in 3/8-16 UNC?Made to order · ask for a price
7/16-14 UNCCarbon SteelGrade 527 variantsH0.239max.A0.969max.TPI14Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1-1/2Zinc PlatedIn stock50042.34
1-1/2Hot Dip GalvanizedIn stock50043.19
1-1/2PlainIn stock50042.20
1-3/4Zinc PlatedIn stock50046.22
1-3/4Hot Dip GalvanizedIn stock50047.13
1-3/4PlainIn stock50046.07
2Zinc PlatedIn stock50050.09
2Hot Dip GalvanizedIn stock50051.07
2PlainIn stock50049.93
2-1/4Zinc PlatedIn stock50053.97
2-1/4Hot Dip GalvanizedIn stock50055.01
2-1/4PlainIn stock50053.79
2-1/2Zinc PlatedIn stock50057.84
2-1/2Hot Dip GalvanizedIn stock50058.96
2-1/2PlainIn stock50057.66
2-3/4Zinc PlatedIn stock50061.72
2-3/4Hot Dip GalvanizedIn stock50062.90
2-3/4PlainIn stock50061.52
3Zinc PlatedIn stock50065.59
3Hot Dip GalvanizedIn stock50066.84
3PlainIn stock50065.39
3-1/2Zinc PlatedIn stock50073.34
3-1/2Hot Dip GalvanizedIn stock50074.73
3-1/2PlainIn stock50073.11
4-1/2Zinc PlatedIn stock50088.84
4-1/2Hot Dip GalvanizedIn stock50090.50
4-1/2PlainIn stock50088.57
Need another length in 7/16-14 UNC?Made to order · ask for a price
1/2-13 UNCCarbon SteelGrade 533 variantsH0.27max.A1.094max.TPI13Thread SeriesUNC
LengthinFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
1-1/2Zinc PlatedIn stock50058.25
1-1/2Hot Dip GalvanizedIn stock50059.28
1-1/2PlainIn stock50058.09
1-3/4Zinc PlatedIn stock50063.38
1-3/4Hot Dip GalvanizedIn stock50064.48
1-3/4PlainIn stock50063.20
2Zinc PlatedIn stock50068.51
2Hot Dip GalvanizedIn stock50069.69
2PlainIn stock50068.32
2-1/4Zinc PlatedIn stock50073.64
2-1/4Hot Dip GalvanizedIn stock50074.89
2-1/4PlainIn stock50073.43
2-1/2Zinc PlatedIn stock50078.77
2-1/2Hot Dip GalvanizedIn stock50080.10
2-1/2PlainIn stock50078.55
2-3/4Zinc PlatedIn stock50083.89
2-3/4Hot Dip GalvanizedIn stock50085.31
2-3/4PlainIn stock50083.66
3Zinc PlatedIn stock50089.02
3Hot Dip GalvanizedIn stock50090.51
3PlainIn stock50088.78
3-1/2Zinc PlatedIn stock50099.28
Need another length in 1/2-13 UNC?Made to order · ask for a price

219 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

Related products

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