Skip to content
Free Local Pickup ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted American Hardware Brands
FAQ Shipping & Returns Order Lookup Contact Account
HILLMAN 5/16 in. X 4 in. L Stainless Steel Carriage Bolt 25 pk

HILLMAN 5/16 in. X 4 in. L Stainless Steel Carriage Bolt 25 pk

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Hillman 5/16 in. x 4 in. Stainless Steel Carriage Bolts — a reliable, outdoor-ready fastener set engineered for smooth wood-to-wood connections. This 25-pack, boxed for easy storag…

Hillman MPN 0832586 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $44.99. Our online price is $49.99.
$49.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within — for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Hillman 5/16 in. x 4 in. Stainless Steel Carriage Bolts — a reliable, outdoor-ready fastener set engineered for smooth wood-to-wood connections. This 25-pack, boxed for easy storage, combines corrosion resistance with straightforward installation to keep your projects looking great year after year.

  • Diameter: 5/16 in
  • Length: 4 in
  • Material: Stainless Steel
  • Thread type: Coarse
  • Head style: Carriage bolt with a smooth, domed head and a square neck under the head to prevent turning during tightening
  • Count: 25 bolts per box
  • Packaging: Boxed
  • Unit: SAE

Why stainless steel matters: corrosion resistance that stands up to rain, humidity, and coastal environments makes these carriage bolts ideal for exterior projects. The stainless steel construction reduces rust staining and extends the life of your hardware-intensive builds.

Ideal uses

  • Deck framing, railings, and garden structures where a strong, reliable joint is needed
  • Fence projects, pergolas, and outdoor furniture assemblies where outdoor durability counts
  • Wood-to-wood connections in softwood applications (coarse thread provides quick, secure bite)
  • Thick timbers or panels requiring a longer bolt length for solid engagement

Practical tips for best results

  • Choose the 4 in length when your material stack is thick or you need a robust fastener through multiple layers
  • Use appropriate pilot holes in hardwoods to minimize splitting; for softwoods, pilot holes help prevent wobble and cracking
  • Pair with standard nuts and washers as needed to distribute load and secure the joint (not included in this pack)
  • Store the boxed 25-pack neatly to avoid misplacing fasteners on large projects or in busy workspaces

The Details Specifications

Brand Hillman
SKU 59643
UPC 008236144949
Unit 0
Case Pack Quantity 6 per case
Retail Unit Quantity 1
Unit of Measure 25 BX
Dimensions (L × W × H) 5 × 4 × 2
Weight 3 lbs
Cubic Feet 0.03091 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Free Local Pickup Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide From our distribution network
Independent Network Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network →
About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare