Hillman 5/16 in. Hot-Dipped Galvanized Steel Split Lock Washer, 100-Pack
SKU: 38416156994

Hillman 5/16 in. Hot-Dipped Galvanized Steel Split Lock Washer, 100-Pack

$10.79 $11.99
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Description

Hillman 5/16 in. Hot-Dipped Galvanized Steel Split Lock Washer, 100-Pack5 16 in. Galvanized Split Lock Washers (100 Pack) Durable Hillman split lock washers provide a secure hold for bolts and screws in vibration prone or outdoor applications. Made of steel with a hot dipped galvanized finish for superior corrosion resistance, they help prevent fasteners from loosening over time. Key Features: Secure Anti Loosening: Split ends bite into surfaces to help keep nuts and bolts tight under vibration. Outdoor Ready Protection:

5/16 in. Galvanized Split Lock Washers (100-Pack)

Durable Hillman split lock washers provide a secure hold for bolts and screws in vibration-prone or outdoor applications. Made of steel with a hot-dipped galvanized finish for superior corrosion resistance, they help prevent fasteners from loosening over time.

Key Features:

  • Secure Anti-Loosening: Split ends bite into surfaces to help keep nuts and bolts tight under vibration.
  • Outdoor-Ready Protection: Hot-dipped galvanized steel resists rust for long-lasting performance.
  • Consistent Load Distribution: Engineered washer profile supports uniform clamping force.
  • Versatile Pairing: Use with matching 5/16 in. nuts and bolts for best fit.
  • Bulk Value: Convenient 100-pack for projects and jobsite stock.

Specifications Table:

Specification Details
Brand Hillman
Diameter 5/16 inch
Finish Hot-Dipped Galvanized
Material Steel
Number in Package 100
Packaging Type Boxed

Frequently Asked Questions (FAQ):

Q: What size fasteners work with these washers?
A: They are designed for 5/16 inch diameter bolts or screws; pair with matching nuts and bolts.

Q: Can these be used outdoors?
A: Yes. The hot-dipped galvanized finish offers strong corrosion resistance suitable for exterior and treated lumber applications.

Q: Do I need special tools to install?
A: No special tools—simply place the washer beneath the nut and tighten as usual to engage the split locking action.

Q: Are these metric or imperial?
A: They are for 5/16 inch imperial fasteners.

Q: What material are they made from?
A: Steel with a hot-dipped galvanized finish.

Industrial Strength, Effortlessly Refined

This split lock washer brings a quiet confidence to hardware details, marrying rugged steel with a weathered, galvanized sheen. Its crisp split edge is a subtle design moment that ensures a tailored, secure finish to any exposed bolt. Style it in outdoor fixtures or reclaimed wood installations where utility becomes part of the aesthetic. A small but essential piece, it elevates the craft and longevity of every project.

Secure your build with corrosion-resistant, 5/16 in. split lock washers—add this 100-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: 38416156994

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shadow
Omaha, US
★★★★★ 4
Works Great but the price is rising!
Anua Azelaic Acid is a very good serum. Both my daughter and I use it regularly. My daughter has severe rosacea, and this has helped calm her skin significantly her redness is almost gone. For me, it has also made a noticeable difference by reducing redness and giving my skin a healthy glow. We both use it at night, and it’s definitely very soothing and calming. The formula is gentle, lightweight, and works really well for sensitive skin without causing irritation. However, the only downside is the price, it seems to have increased quite a bit recently, which is concerning. I bought a couple during Amazon Prime Day, which worked out really well. For a relatively simple azelaic acid serum, the price increase feels a bit steep. If the price continues to rise, I may need to look for a more budget-friendly alternative. Otherwise, it’s a really great serum that delivers great results.
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Reviewed in the United States on March 30, 2026
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Ella Carpenter
New York, US
★★★★★ 5
DERM APPROVED!
I am obsessed with this product!! This feels very luxurious on my skin and does not pill like other products I have had in the past. I have noticed a significant improvement in the background redness in my skin. As someone who works in derm and values good ingredients and products that actually work... I can confidently say that this is the best OTC azelaic acid product I have tried out. It sits very nicely under my moisturizer and does not dehydrate my skin like other azelaic acid products have done in the past. HIGHLY RECOMMEND
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Reviewed in the United States on May 10, 2026
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Paisley Stewart
Bozeman, US
★★★★★ 5
A Game Changer for Sensitive Skin
I use this serum every single day, and it has become one of the most important products in my skincare routine. I have very sensitive skin and cannot tolerate stronger active ingredients such as retinol or high-strength acids, so finding something effective but gentle has been incredibly important. This serum has helped calm redness, reduce inflammation, and noticeably improve my skin’s overall appearance and comfort. After dealing with a prolonged inflammatory skin condition, this product made a significant difference and helped restore my skin barrier. The formula feels soothing, hydrating, and non-irritating. If you have sensitive or reactive skin and are looking for a gentle product to help with redness and uneven texture, I highly recommend giving this serum a try. Photos attached: The green bottle is the product and the second photo includes my favorite additions.
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Reviewed in the United States on May 13, 2026
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Bri M.
Fort Morgan, US
★★★★★ 5
Perfect for Acne-Prone Skin!
This serum has honestly been a great addition to my routine for redness and post-acne marks. The texture is lightweight, hydrating, and doesn’t feel sticky or heavy on my oily/acne-prone skin. I have sensitive skin with a focus on barrier protection, and this didn’t irritate my skin at all. It layers beautifully with the rest of my skincare and leaves my skin looking calmer and smoother over time. AND, it doesn’t have a smell!! Definitely one of my favorite azelaic acid serums I’ve tried.
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Reviewed in the United States on May 18, 2026
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Leyla Leiva
Bozeman, US
★★★★★ 5
6-Month Update: Still a staple for sensitive, acne-prone skin
Size: 3.38 Fl Oz (Pack of 1), Size: 3.38 Fl Oz (Pack of 1)
I originally reviewed this ampoule when I first started using it, and now after about six months of consistent use (morning and night), I feel confident giving a more long-term update. I have sensitive, acne-prone, combination skin, and this has remained one of the most reliable products in my routine. The texture is still one of my favorite things about it — very lightweight, absorbs quickly, and layers well under moisturizer and sunscreen without pilling. Over time, I’ve noticed: Less visible redness More balanced oil production in my T-zone Fewer irritation flare-ups when introducing new products No clogged pores or breakouts from this formula It doesn’t feel heavy or sticky, even in humid weather. I’ve continued repurchasing and even keep it on subscription because it consistently performs without causing sensitivity. If you’re looking for a gentle, soothing centella product that works well for long-term barrier support, this has proven to be a dependable option in my experience.
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Reviewed in the United States on December 9, 2025

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