Carriage & Specialty Bolts

300+ products

Expected delivery: Wed, Nov 18

Carriage and specialty bolts solve fastening jobs that a standard hex bolt cannot. Carriage bolts have a smooth domed head with a square neck that locks into wood or a square hole, so they tighten from the nut side only. This section also covers plow bolts for cutting edges, elevator bolts for conveyor belting, U-bolts for pipe and truck springs, J-bolts and L-bolts for anchoring, hex flange bolts, and shoulder bolts.

What to check before you order

Head and neck. Carriage bolts need a snug fit at the square neck to stop them from spinning. Plow bolts need the correct head angle and neck to match the cutting edge.
U-bolt size. Measure the inside width between the legs, the inside length to the bend, and the thread size. For pipe, order by nominal pipe size.
Grade. Many carriage bolts are Grade 2 or Grade 5. Check the grade where the joint carries a real load.
Finish. Hot-dip galvanized and stainless are common for fencing, docks, decks and outdoor structures.

Common questions

Can I lift with a regular eye bolt?

Only eye bolts rated for lifting should be used for overhead lifting, and only as the manufacturer and your rigging procedures direct. Rated lifting hardware is listed under hooks, shackles and eye bolts.

Pair these with nuts and washers, or go back to fasteners.

Carriage & Specialty Bolts: page 7

Approved Vendor 5/8"-11x1-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 25856 $2.38
Approved Vendor 5/8"-11x1-1/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25858 $2.74
Approved Vendor 5/8"-11x1-1/4" Square Head Bolts Grade A307 Zinc Clear SKU 25859 $2.10
Approved Vendor 5/8"-11x1-3/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25862 $3.35
Approved Vendor 5/8"-11x1-3/4" Square Head Bolts Grade A307 Zinc Clear SKU 25863 $2.57
Approved Vendor 5/8"-11x2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25872 $3.68
Approved Vendor 5/8"-11x2" Square Head Bolts Grade A307 Zinc Clear SKU 25873 $2.84
Approved Vendor 5/8"-11x2-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25876 $4.06
Approved Vendor 5/8"-11x2-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 25877 $3.28
Approved Vendor 5/8"-11x3" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25882 $5.03
Approved Vendor 5/8"-11x3" Square Head Bolts Grade A307 Zinc Clear SKU 25883 $4.06
Approved Vendor 5/8"-11x3-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25886 $5.62
Approved Vendor 5/8"-11x3-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 25887 $6.43
Approved Vendor 5/8"-11x4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25892 $4.44
Approved Vendor 5/8"-11x4" Square Head Bolts Grade A307 Zinc Clear SKU 25893 $5.18
Approved Vendor 5/8"-11x4-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25895 $7.20
Approved Vendor 5/8"-11x4-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 25896 $5.59
Approved Vendor 5/8"-11x5" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25899 $7.57
Approved Vendor 5/8"-11x5" Square Head Bolts Grade A307 Zinc Clear SKU 25900 $6.49
Approved Vendor 5/8"-11x5-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25903 $8.09
Approved Vendor 5/8"-11x5-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 25904 $9.06
Approved Vendor 5/8"-11x6" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25909 $6.77
Approved Vendor 5/8"-11x6" Square Head Bolts Grade A307 Zinc Clear SKU 25910 $7.39
Approved Vendor 5/8"-11x7" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25911 $10.88
Approved Vendor 5/8"-11x7" Square Head Bolts Grade A307 Zinc Clear SKU 25912 $8.71
Approved Vendor 5/8"-11x8" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 25915 $10.16
Approved Vendor 5/8"-11x8" Square Head Bolts Grade A307 Zinc Clear SKU 25916 $10.22
Approved Vendor 5/8-11x1-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 25 $2.88
Approved Vendor 5/8-11x1-1/2" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 26088 $2.88
Approved Vendor 5/8-11x1-3/4" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 26 $3.33
Approved Vendor 5/8-11x12" Grade A Splined Timber Bolts Galvanized SKU 26123 $16.69
Approved Vendor 5/8-11x14" Grade A Splined Timber Bolts Galvanized SKU 26125 $15.90
Approved Vendor 5/8-11x16" Grade A Splined Timber Bolts Galvanized SKU 26126 $18.81
Approved Vendor 5/8-11x2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 27 $3.56
Approved Vendor 5/8-11x2" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 26134 $2.82
Approved Vendor 5/8-11x2" Grade 8 #3 Dome Head Plow Bolts Plain SKU 26136 $3.48
Approved Vendor 5/8-11x2" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 26139 $3.86
Approved Vendor 5/8-11x2-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 29 $4.50
Approved Vendor 5/8-11x2-1/2" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 26150 $3.46
Approved Vendor 5/8-11x2-1/2" Grade 8 #3 Dome Head Plow Bolts Plain SKU 26151 $3.96
Approved Vendor 5/8-11x2-1/2" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 26154 $4.40
Approved Vendor 5/8-11x2-1/4" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 28 $4.00
Approved Vendor 5/8-11x2-1/4" Grade 8 #3 Dome Head Plow Bolts Plain SKU 26165 $3.77
Approved Vendor 5/8-11x3" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 30 $5.10
Approved Vendor 5/8-11x3" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 26187 $3.94
Approved Vendor 5/8-11x3" Grade 8 #3 Dome Head Plow Bolts Plain SKU 26188 $5.47
Approved Vendor 5/8-11x3" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 26190 $5.04
Approved Vendor 5/8-11x3-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 31 $5.77

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