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A307 Grade A Carriage Bolts

Round head square neck bolts are referred to as Carriage Bolts. With their trademark shallow, mushroom-shaped head, these bolts are intended to be used in low profile applications where access to installing and removing the bolt is only available from the nut side.  This includes many wood-to-wood or metal-to-wood applications.  Because of the 1-sided access, they are also often used in applications where tamperproof access is desired.
 
Model Product Size Plate Pkg Qty  
488052 5/16"-18 x 3" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 625
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489052 5/16"-18 x 3" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 625
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490043 5/16"-18 x 3" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 625
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Quote
488053 5/16"-18 x 3-1/4" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 600
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Quote
489053 5/16"-18 x 3-1/4" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 450
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488054 5/16"-18 x 3-1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 500
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489054 5/16"-18 x 3-1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 500
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Quote
490044 5/16"-18 x 3-1/2" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 500
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Quote
488055 5/16"-18 x 3-3/4" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 350
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489055 5/16"-18 x 3-3/4" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 350
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Quote
428063 5/16"-18 x 4" Carriage Bolt, A307 Gr. A, Zinc-Yellow 5/16"-18 Zinc-Yellow 425
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Quote
488056 5/16"-18 x 4" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 375
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Quote
489056 5/16"-18 x 4" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 375
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Quote
490045 5/16"-18 x 4" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 375
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Quote
489057 5/16"-18 x 4 1/4" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 350
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Quote
488057 5/16"-18 x 4-1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 325
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Quote
489058 5/16"-18 x 4-1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 325
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Quote
490046 5/16"-18 x 4-1/2" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 325
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Quote
488058 5/16"-18 x 5" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 300
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Quote
489059 5/16"-18 x 5" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 300
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Quote
490047 5/16"-18 x 5" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 300
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Quote
488059 5/16"-18 x 5-1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 250
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Quote
489060 5/16"-18 x 5-1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 250
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Quote
490048 5/16"-18 x 5-1/2" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 300
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Quote
488060 5/16"-18 x 6" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 225
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Quote
489061 5/16"-18 x 6" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 225
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Quote
490049 5/16"-18 x 6" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 225
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Quote
488061 5/16"-18 x 6 1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 200
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Quote
489062 5/16"-18 x 6 1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 200
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Quote
490111 5/16"-18 x 6 1/2" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 350
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Quote
488062 5/16"-18 x 7" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 200
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Quote
489063 5/16"-18 x 7" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 200
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Quote
490112 5/16"-18 x 7" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 325
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Quote
488063 5/16"-18 x 7 1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 175
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Quote
489064 5/16"-18 x 7 1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 175
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Quote
490113 5/16"-18 x 7 1/2" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 300
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Quote
488064 5/16"-18 x 8" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 300
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Quote
489065 5/16"-18 x 8" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 175
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Quote
490114 5/16"-18 x 8" Carriage Bolt, A307 Gr. A, HD Galv. 5/16"-18 HD Galv. 300
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Quote
488065 5/16"-18 x 8 1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 130
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Quote
489179 5/16"-18 x 8 1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 200
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Quote
488066 5/16"-18 x 9" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 150
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Quote
489180 5/16"-18 x 9" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 300
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Quote
488067 5/16"-18 x 9 1/2" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 125
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Quote
489200 5/16"-18 x 9 1/2" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 0
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Quote
488068 5/16"-18 x 10" Carriage Bolt, A307 Gr. A, Plain 5/16"-18 Plain 100
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Quote
489066 5/16"-18 x 10" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 175
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Quote
489181 5/16"-18 x 11" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 100
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Quote
489067 5/16"-18 x 12" Carriage Bolt, A307 Gr. A, Zinc 5/16"-18 Zinc 175
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Quote
428262 3/8"-16 x 3/4" Carriage Bolt, A307 Gr. A, Zinc-Yellow 3/8"-16 Zinc-Yellow 0
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Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Zinc-Yellow
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
HD Galv.
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Plain
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
5/16"-18
Plate:
Zinc
Model:
Size:
3/8"-16
Plate:
Zinc-Yellow

Manufacturing of A307 Grade A Carriage Bolts

A307 Grade A Carriage Bolts are manufactured from low carbon steel (less than 0.25% carbon) with a minimum tensile strength of 60,000 PSI, making them ideal for a wide range of general purpose applications.  They may be supplied in a standard neck, short neck, ribbed neck, or fin neck.  They are readily available in plain finish, electro-zinc, and hot-dip galvanized.
 

Contact Us About A307 Grade A Carriage Bolts Today

Call Empire Bolt & Screw or send us a Request for Quote on your A307 Grade A Carriage Bolt needs today.

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