Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)
SKU: 42396517231

Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)

Sale price$41.39 Regular price$45.99
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Description

Hillman 5/16 in. x 3-1/2 in. Stainless Steel Carriage Bolts (25-Pack)Stainless Steel Carriage Bolts, 5 16 in. x 3 1 2 in. (25 Pack) Durable Hillman stainless steel carriage bolts provide a smooth, domed head and square neck that locks into wood for secure fastening. Ideal for exterior projects, they resist rust and corrosion and deliver a clean, semi flush finish. Key Features: Corrosion Resistant: Stainless steel construction stands up to outdoor and marine environments Secure Hold: Square shoulder locks into wood to

Stainless Steel Carriage Bolts, 5/16 in. x 3-1/2 in. (25-Pack)

Durable Hillman stainless steel carriage bolts provide a smooth, domed head and square neck that locks into wood for secure fastening. Ideal for exterior projects, they resist rust and corrosion and deliver a clean, semi-flush finish.


Key Features:

  • Corrosion Resistant: Stainless steel construction stands up to outdoor and marine environments
  • Secure Hold: Square shoulder locks into wood to prevent spinning during tightening
  • Clean Finish: Smooth, domed head creates a semi-flush, snag-free surface
  • Coarse Thread: SAE coarse threading for strong, reliable assembly
  • Value Pack: Includes 25 bolts sized 5/16 in. diameter x 3-1/2 in. length

Specifications Table:

Specification Details
Diameter 5/16 inch
Length 3-1/2 inch
Material Stainless Steel
Finish Stainless steel
Thread Size 5/16-18 (coarse)
Thread Type Coarse
Unit of Measurement SAE
Head Style Domed carriage head
Neck Style Square shoulder
Number in Package 25
Packaging Type Boxed
Intended Use Fasten wood face to wood or metal frame
Pack UPC (on box) 008236144932

Frequently Asked Questions (FAQ):

Q: Do these bolts include nuts or washers?
A: No—this pack contains only the carriage bolts; nuts and washers are sold separately.


Q: Can I use these outdoors?
A: Yes, the stainless steel material offers excellent rust and corrosion resistance for exterior applications.


Q: What tools are needed for installation?
A: Tighten from the nut side; the square neck locks into the wood to prevent bolt rotation, so no driver is needed for the head.


Q: What thread size are these?
A: They are 5/16 in. diameter with coarse SAE threads (5/16-18).


Q: What materials are they best for?
A: Designed to fasten a wood face to wood or metal framing.


Sleek Strength for Thoughtful Builds

A polished dome of stainless steel lends a refined, unobtrusive accent to woodwork while delivering steadfast performance. The square-shoulder detail is the quiet hero—discreetly locking into timber for a flawless, flush look. Pair with cedar or painted millwork where hardware should disappear into the narrative. For elevated outdoor living, these bolts are the subtle signature of craftsmanship.


Upgrade your project with corrosion-proof, clean-finish carriage bolts—add this 25-pack to your cart today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42396517231

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P. Hardilek
Phoenix, US
★★★★★ 5
Great product and fast shipping
Style: EcoFetch
Great ball launcher and ball. My dog adores it and plays with the ball even when she isn’t fetching. Fast shipping as well!
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Reviewed in the United States on May 26, 2026
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CraZyLeS
Cuba, US
★★★★★ 5
Different colors
Style: EcoFetch
Works well. It is nice it is a different color from all the other Chuckit it balls. Dog loves it. Just wish she would bring it back.
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Reviewed in the United States on May 6, 2026
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Renae Halvorson
Port Orchard, US
★★★★★ 4
Value for your money
Style: EcoFetch
It's definitely different from the one I lost. It's taking me some time how to throw the ball correctly. It's a hit and miss but we are getting there. When I do get a good throw, it really wings it out there.
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Reviewed in the United States on May 17, 2026
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Will Brannies
West Palm Beach, US
★★★★★ 5
Well worth it
Style: EcoFetch
Works great
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Reviewed in the United States on May 20, 2026
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TailoredBohemian
Lexington, US
★★★★★ 5
Awesome quality balls -- my dog loves them!
Color: F) 3-Pack (2.5" Balls)
Love this 3 ball set and variety and quality. These are the 2.5" size, similar to a tennis ball size give or take. The fun citron yellow one is the thickest + heaviest, very bouncy, and tough. The blue is still tough but not as thick or bouncy, a bit more flexible. And the clearish one is the lightest/flexible and is glow in the dark [although we haven't tried that part yet]. I have a 7month old 40lb girl who is becoming like a power chewer on some things -- but hasn't done that with these. She can play, mouth them, chew them, not even one knick or anything. Yes! The citron and blue one we leave out all the time in her little toy box. They have holes in the middle and have used them to hold thinner bully sticks and other treats. The blue one is fun to put smaller treats inside that she can work out like a puzzle. Obviously they are fun for fetch! We leave the other up and only get out when we can play with her because label said it is not a chew toy so we didn't want to take chances. Overall super fun and cool and good quality, human and dog approved LoL. ***We ordered the 2 set of 4" balls, blue and purple [they are same consistency of the blue ball] and love these too! Very fun and good at using with treats the sticks too, plus these don't get lost under sofas and furniture like the smaller ones, a big plus.
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Reviewed in the United States on November 28, 2025

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