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 5

Approved Vendor 3/8"-16x1-3/4" Square Head Bolts Grade A307 Zinc Clear SKU 22528 $0.84
Approved Vendor 3/8"-16x2" Grade A307 Step Bolts Zinc SKU 22543 $2.59
Approved Vendor 3/8"-16x2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22546 $1.28
Approved Vendor 3/8"-16x2" Square Head Bolts Grade A307 Zinc Clear SKU 22547 $0.97
Approved Vendor 3/8"-16x2-1/2" Grade A307 Step Bolts Zinc SKU 22551 $2.95
Approved Vendor 3/8"-16x2-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22554 $1.41
Approved Vendor 3/8"-16x2-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 22555 $1.11
Approved Vendor 3/8"-16x2-1/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22558 $1.33
Approved Vendor 3/8"-16x2-1/4" Square Head Bolts Grade A307 Zinc Clear SKU 22559 $1.06
Approved Vendor 3/8"-16x2-3/4" Grade A307 Step Bolts Zinc SKU 22561 $2.92
Approved Vendor 3/8"-16x2-3/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22563 $1.53
Approved Vendor 3/8"-16x2-3/4" Square Head Bolts Grade A307 Zinc Clear SKU 22564 $1.21
Approved Vendor 3/8"-16x3" Grade A307 Step Bolts Zinc SKU 22570 $3.25
Approved Vendor 3/8"-16x3" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22573 $1.69
Approved Vendor 3/8"-16x3" Square Head Bolts Grade A307 Zinc Clear SKU 22574 $1.37
Approved Vendor 3/8"-16x3-1/2" Grade A307 Step Bolts Zinc SKU 22576 $4.64
Approved Vendor 3/8"-16x3-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22579 $1.96
Approved Vendor 3/8"-16x3-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 22580 $1.56
Approved Vendor 3/8"-16x3/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22589 $0.62
Approved Vendor 3/8"-16x3/4" Square Head Bolts Grade A307 Zinc Clear SKU 22590 $0.49
Approved Vendor 3/8"-16x4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22597 $2.49
Approved Vendor 3/8"-16x4" Square Head Bolts Grade A307 Zinc Clear SKU 22598 $1.85
Approved Vendor 3/8"-16x4-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22601 $2.54
Approved Vendor 3/8"-16x4-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 22602 $1.94
Approved Vendor 3/8"-16x5" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22605 $2.70
Approved Vendor 3/8"-16x5" Square Head Bolts Grade A307 Zinc Clear SKU 22606 $2.12
Approved Vendor 3/8"-16x5-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22608 $2.93
Approved Vendor 3/8"-16x5-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 22609 $2.35
Approved Vendor 3/8"-16x6" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22617 $3.28
Approved Vendor 3/8"-16x6" Square Head Bolts Grade A307 Zinc Clear SKU 22618 $2.53
Approved Vendor 3/8-16x1" Round Head Square Neck Elevator Bolts Zinc SKU 22847 $1.35
Approved Vendor 3/8-16x1" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 1 $0.70
Approved Vendor 3/8-16x1" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 22863 $0.54
Approved Vendor 3/8-16x1" Stainless Steel 18-8 Carriage Bolts SKU 2134 $0.99
Approved Vendor 3/8-16x1-1/2" Round Head Square Neck Elevator Bolts Zinc SKU 22877 $1.35
Approved Vendor 3/8-16x1-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 3 $0.93
Approved Vendor 3/8-16x1-1/2" Grade 5 Clipped Head Plow Bolts Plain & Oil SKU 22892 $1.47
Approved Vendor 3/8-16x1-1/2" Grade 5 Clipped Head Plow Bolts Zinc SKU 22893 $0.99
Approved Vendor 3/8-16x1-1/2" Grade 5 Elliptical Head Plow Bolts Zinc SKU 22894 $1.49
Approved Vendor 3/8-16x1-1/2" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 22896 $0.71
Approved Vendor 3/8-16x1-1/2" Stainless Steel 18-8 Carriage Bolts SKU 2136 $1.24
Approved Vendor 3/8-16x1-1/4" Round Head Square Neck Elevator Bolts Zinc SKU 22910 $1.44
Approved Vendor 3/8-16x1-1/4" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 2 $0.83
Approved Vendor 3/8-16x1-1/4" Grade 5 Clipped Head Plow Bolts Plain & Oil SKU 22925 $1.44
Approved Vendor 3/8-16x1-1/4" Grade 5 Clipped Head Plow Bolts Zinc SKU 22926 $0.96
Approved Vendor 3/8-16x1-1/4" Grade 5 Elliptical Head Plow Bolts Zinc SKU 22927 $1.53
Approved Vendor 3/8-16x1-1/4" Grade 5 Round Head Square Neck Carriage Bolts Zinc SKU 22929 $0.64
Approved Vendor 3/8-16x1-1/4" Stainless Steel 18-8 Carriage Bolts SKU 2135 $1.10

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