Skip to content
Product Description

Part Number: 31C75SHB307G
Diameter/Pitch: 5/16"-18
Length Under Head: 3/4"
Grade: A307
Finish: Hot Dip Galvanized
Coarse / Fine Threads: Coarse
Partial / Full Threads: Full
Wrench Size: 1/2"

BoltsandNuts.com

5/16"-18x3/4" Square Head Bolts Grade A307 Hot Dip Galvanized

SKU: 31C75SHB307G
Product Description

Part Number: 31C75SHB307G
Diameter/Pitch: 5/16"-18
Length Under Head: 3/4"
Grade: A307
Finish: Hot Dip Galvanized
Coarse / Fine Threads: Coarse
Partial / Full Threads: Full
Wrench Size: 1/2"

Promo

B&N Pro eligible item. Save 10% when you join Pro. Learn more.

1
$0.42/pc
Popular
55
$0.31/pc
110
$0.26/pc
275
$0.21/pc
Best Value
2600
$0.15/pc
$0.42
B&N Pro $0.00 Member Price
(Shipping $8.95) Add [amount] more for FREE SHIPPING
Father's Day Bundle Sale

Celebrate Father's Day with three specially curated bundles

SALE ENDS: 6/16/26

Diameter Pitch: 5/16"-18
Length Under Head: 3/4"
Finish: Hot Dip Galvanized
Partial Full Threads: Full
Coarse Fine Threads: Coarse
Wrench Size: 1/2"
Grade Material: A307
Head Type: Square

Free Shipping Over $25

Orders ship from Perry, Ohio. Standard ground shipping is free on orders $25+ within the contiguous United States.

Expedited & Overnight Shipping

Available at checkout. Orders placed before 2 PM ET ship same day from in-stock inventory.

30-Day Returns

Return any unopened item within 30 days for a full refund. Free return labels available for qualifying customers.