50Pcs 5/16"-18x3-1/2 Carriage Bolt White Galvanized
US$58.66
Arrives as soon as ✓ Free shipping over $200Description
Product Details Color: White Item Dimensions: 7.09 x 2.95 x 7.87 inches Number of Items: 50 Unit Count: 50 Count Part Number: bol000618260319f Thread Size: 5/16"-18 Thread Style: Right Hand...
Delivery & Returns
Free shipping $200+
Orders of $200 or more ship free. No code needed.
Reviews
Steelnook
You might also like
Mensarix
Black Front Door Handle and Deadbolt Set with Crystal Door knob
US$107.98
Alffun
4 Pack T Post Timber Frame Brackets, 14"x10" T Flat Mending Plate
US$59.38
NEODROP
NEODROP 2-Pack 8 Inch Countertop Support Brackets, Heavy Duty L Brackets for Quartz/Wood/Laminate/Granite Countertops | 3/8" Thick Metal Steel | Frosted Black Powder Coated
US$50.38
Hillman
Hillman 240156 Carriage Bolt, 3/8 x 2-Inch, Steel, Zinc-Plated, Silver, 100-Pack
US$73.78
Fastener Depot
5/8" x 10" (25 Sets) Hot Dipped Galvanized Carriage Bolt Kit for Exterior Use, Commerical Grade A 307, Includes USS Flat Washers (25 pcs) and Hex Nuts (25 pcs), 6" of Thread - by Fastener Depot
US$156.40
Taukealugs
48 Pcs 1/4" NPT Air Compressor Coupler & Plug Kit Air Hose Fitting
US$59.38
HISAFE
Grade 1 Commercial Door Closer, Heavy Duty Auto Hydraulic Closer
US$233.98
Oregon
Oregon Chainsaw Chain, 3/8" LP Pitch, .050" Gauge, 100-Foot Reel
US$672.70
VoTwoofv
Pergola Flat Brackets 10" x 10",L-Shape Straight Joining Brackets for 4 x 4 or 6 x 6 Lumber,Heavy Duty Mending Plate for Gazebo,Porch,Truss Framing,Log Cabins - 4Pack
US$62.98
Hoteam
Hoteam Set of 12 Industrial Pipe Shelf Brackets Black Iron Metal Wall Mounted DIY Shelving Rustic Pipe Wall Bracket Hanging Brackets for Floating Shelves Clothing,Hardware Included(12 Inch)
US$89.98
80/20
8020, 4332, 15 Series, 2 Hole Aluminum Inside Corner Gusset L Bracket for 80/20 Extruded Aluminum Extrusion Heavy Duty Angle Bracket (10, Black Anodize)
US$219.51
80/20
8020, 4332, 15 Series, 2 Hole Aluminum Inside Corner Gusset L Bracket for 80/20 Extruded Aluminum Extrusion Heavy Duty Angle Bracket (25, Clear Anodize)
US$377.91
More options
Product Details
- Color: White
- Item Dimensions: 7.09 x 2.95 x 7.87 inches
- Number of Items: 50
- Unit Count: 50 Count
- Part Number: bol000618260319f
- Thread Size: 5/16"-18
- Thread Style: Right Hand
- Item Highlight: White Galvanized Round Head Square Neck Carriage Screws for DIY Mechanical Work
- Size Name: 5/16"-18x3-1/2"
- Thread Coverage: Fully Threaded
- Material Type: Carbon Steel
About this item
- Abrasive Material: Carbon Steel – This carriage bolt features an extra-large round head for a larger contact surface and higher-stress applications than standard round head square neck bolts. Made of quality carbon steel with high strength, good rigidity, and excellent resistance to breakage and bending. The square neck beneath the round head prevents bolt rotation during installation and use, ensuring a stable assembly and a secure connection.
- Specification: Material: Carbon Steel; Color: Blue-White; Surface Treatment: Galvanized; Screw Size: 5/16"-18; Screw Length: 3-1/2"; Screw Head Size: 3/16" x 11/16"(T x D); Package Content: 50 Pcs Carriage Bolts Screws
- Multi-Purpose: Suitable for wood-to-wood or wood-to-metal indoor fastening. Suitable for home DIY projects, furniture assembly, bed frames, tables, chairs, garage doors, cabinet installation, and general household maintenance. It provides stable and firm connections for daily indoor applications.
- Flexible Mounting: The round head with square neck design allows anti-rotation locking when installed into a pre-drilled square hole. The square neck holds the bolt in place and prevents rotation during installation.
- Usage Tips: Pre-drill square holes with 0.1mm tolerance for the square neck. Drill clearance holes 0.2–0.5mm wider than the bolt shank to avoid thread damage. Ensure proper hole sizes to prevent looseness or difficult installation. Store in a dry environment to maintain the surface condition.
Shipping Policy
Steelnook ships from the United States.
Most orders leave the warehouse within 1 business day and arrive in 2–7 business days.
- Free shipping on orders of $200 or more, applied automatically
- Otherwise shipping is a flat $6.90
- Your tracking number is emailed as soon as your order ships
- We currently ship to the lower 48 United States
Return policy
30-day returns.
If it's not quite right, you can request a return within 30 days of delivery, and Steelnook will email you return instructions. Change-of-mind returns must be unused, unassembled, and in their original packaging. There is no restocking fee. Depending on the item's packaged size and weight and how it needs to be collected, a change-of-mind return may have a return shipping or pickup cost. We only deduct the actual cost: we tell you the exact amount and get your OK before arranging a paid return, and if there is no cost, nothing is deducted. Returns for damaged, defective, or incorrect items are free.
How it works
- Email us at support@steelnook.com with your order number.
- We send your return instructions within 1 business day, along with any return shipping cost so you can decide.
- Your refund goes back to your original payment method within 10 business days of the carrier scan.
Damaged or defective on arrival? Send a photo and Steelnook replaces or refunds immediately, return shipping on us, and in most cases you won't need to send anything back.