Carriage Bolts 316 Stainless Steel 1/4-20"

1/4"-20 316 Stainless Steel Carriage Bolt

Diameter - Thread Pitch: 1/4-20


  • Square section grips into the part being fixed (typically wood)
  • Carriage bolts are threaded all the way down to the square section beneath the head
  • Prevents the bolt from turning when the nut is tightened
  • 316 Stainless steel is corrosion and rust resistant
  • 316 Stainless steel is considered the fastener industry standard

1/4"-20 Carriage bolts have a domed or countersunk head, and the shank is topped by a short square section under the head.

Diameter x Thread Pitch x Length from Under Head
FT: Fully Threaded
PT: Partially Threaded

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Product Specifications
Color
Silver
Corner Radius on Square
0.031
Corrosion Resistant
Yes
Filet Radius
0.031
Grade
316
Head Diameter
Max 0.594 - Min 0.563
Head Height Max
0.145
Head Style
Dome
Marine Grade
Yes
Material
Stainless Steel
Overall Head Height
Max 0.145 - Min 0.125
Product Type
Carriage Bolt
Square Neck Depth
Max 0.156 - Min 0.125
Square Neck Width
Max 0.260 - Min 0.245
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Pitch (Count)
20 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances