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 4

Approved Vendor 3/4"-10x2-3/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21043 $7.56
Approved Vendor 3/4"-10x2-3/4" Square Head Bolts Grade A307 Zinc Clear SKU 21044 $5.99
Approved Vendor 3/4"-10x3" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21046 $8.51
Approved Vendor 3/4"-10x3" Square Head Bolts Grade A307 Zinc Clear SKU 21047 $6.38
Approved Vendor 3/4"-10x3-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21049 $9.36
Approved Vendor 3/4"-10x3-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 21050 $7.40
Approved Vendor 3/4"-10x4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21055 $10.13
Approved Vendor 3/4"-10x4" Square Head Bolts Grade A307 Zinc Clear SKU 21056 $8.28
Approved Vendor 3/4"-10x4-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21058 $10.96
Approved Vendor 3/4"-10x4-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 21059 $8.81
Approved Vendor 3/4"-10x5" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21061 $12.18
Approved Vendor 3/4"-10x5" Square Head Bolts Grade A307 Zinc Clear SKU 21062 $9.84
Approved Vendor 3/4"-10x5-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21064 $12.72
Approved Vendor 3/4"-10x5-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 21065 $14.17
Approved Vendor 3/4"-10x6" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21068 $10.53
Approved Vendor 3/4"-10x7" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21069 $15.82
Approved Vendor 3/4"-10x7" Square Head Bolts Grade A307 Zinc Clear SKU 21070 $12.60
Approved Vendor 3/4"-10x8" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21072 $19.00
Approved Vendor 3/4"-10x8" Square Head Bolts Grade A307 Zinc Clear SKU 21073 $14.72
Approved Vendor 3/4"-10x9" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 21074 $20.58
Approved Vendor 3/4"-10x9" Square Head Bolts Grade A307 Zinc Clear SKU 21075 $16.41
Approved Vendor 3/4-10x2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 33 $5.85
Approved Vendor 3/4-10x2" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21235 $5.01
Approved Vendor 3/4-10x2-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 34100 $268.77
Approved Vendor 3/4-10x2-1/2" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21243 $6.30
Approved Vendor 3/4-10x2-1/2" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21246 $7.32
Approved Vendor 3/4-10x2-1/4" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21252 $5.54
Approved Vendor 3/4-10x2-3/4" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21259 $6.99
Approved Vendor 3/4-10x3" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 35100 $306.10
Approved Vendor 3/4-10x3" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21266 $8.62
Approved Vendor 3/4-10x3" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21269 $8.90
Approved Vendor 3/4-10x3-1/2" #3 Flat Round Head Grade 5 Plow Bolts Zinc SKU 36 $9.16
Approved Vendor 3/4-10x3-1/2" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21276 $7.14
Approved Vendor 3/4-10x3-1/2" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21278 $9.95
Approved Vendor 3/4-10x4" Grade 8 #3 Dome Head Plow Bolts Plain SKU 21291 $7.21
Approved Vendor 3/4-10x4" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21293 $10.88
Approved Vendor 3/4-10x5" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21308 $12.28
Approved Vendor 3/4-10x6" Grade 8 Round Head Square Neck Full Thread Carriage Bolts Plain SKU 21318 $13.74
Approved Vendor 3/8"-16x1" Grade A307 Step Bolts Zinc SKU 22500 $2.00
Approved Vendor 3/8"-16x1" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22504 $0.76
Approved Vendor 3/8"-16x1" Square Head Bolts Grade A307 Zinc Clear SKU 22505 $0.54
Approved Vendor 3/8"-16x1-1/2" Grade A307 Step Bolts Zinc SKU 22510 $2.04
Approved Vendor 3/8"-16x1-1/2" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22513 $0.95
Approved Vendor 3/8"-16x1-1/2" Square Head Bolts Grade A307 Zinc Clear SKU 22514 $0.76
Approved Vendor 3/8"-16x1-1/4" Grade A307 Step Bolts Zinc SKU 22518 $2.15
Approved Vendor 3/8"-16x1-1/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22521 $0.87
Approved Vendor 3/8"-16x1-1/4" Square Head Bolts Grade A307 Zinc Clear SKU 22522 $0.64
Approved Vendor 3/8"-16x1-3/4" Square Head Bolts Grade A307 Hot Dip Galvanized SKU 22527 $1.37

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