SKU: 99760710004

Hillman 0.31 in. Diameter Zinc-Plated Steel Split Lock Washer, 100-Pack

Sale price$19.06 Regular price$21.18
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Description

Hillman 0.31 in. Diameter Zinc-Plated Steel Split Lock Washer, 100-PackZinc Plated Split Lock Washers, 100 Pack These Hillman split lock washers deliver reliable vibration resistant fastening for indoor or outdoor projects. Made of durable steel with a zinc plated finish to resist corrosion, they help keep nuts and bolts securely tightened. Sized at 0. 31 in. diameter and packaged 100 per box for convenient bulk use. Key Features: Secure Fastening: Split ends bite into mating material to help prevent nuts and bolts from

Zinc-Plated Split Lock Washers, 100-Pack

These Hillman split lock washers deliver reliable vibration-resistant fastening for indoor or outdoor projects. Made of durable steel with a zinc-plated finish to resist corrosion, they help keep nuts and bolts securely tightened. Sized at 0.31 in. diameter and packaged 100 per box for convenient bulk use.


Key Features:

  • Secure Fastening: Split ends bite into mating material to help prevent nuts and bolts from loosening under vibration
  • Corrosion Resistant: Zinc-plated steel construction stands up to moisture and outdoor conditions
  • Bulk Convenience: 100 washers per box for larger projects and restocking needs
  • Versatile Use: Ideal for treated lumber and general hardware applications with matching bolt diameters
  • Metric Compatibility: M8 sizing aligns with common metric fasteners

Specifications Table:

Specification Details
Material Steel
Finish Zinc-Plated
Product Type Split Lock Washer
Diameter 0.31 in (M8)
Number in Package 100 pk
Packaging Type Boxed
Assembled Product Weight 0.4 lb
Manufacturer Part Number 923228
Assembled Product Dimensions (L x W x H) 1.80 x 1.40 x 1.50 inches

Frequently Asked Questions (FAQ):

Q: What size bolts are these compatible with?
A: They are designed for M8 metric bolts and approximately 0.31 in. diameter hardware.


Q: Can these be used outdoors?
A: Yes. The zinc-plated steel provides rust resistance suitable for outdoor or moist environments.


Q: How do split lock washers work?
A: The split design applies spring tension that bites into the surface under a nut, helping maintain clamp load and resist loosening from vibration.


Q: How many washers are in the package?
A: 100 washers per boxed pack.


Q: Are they suitable with treated lumber?
A: Yes, they can be used with treated lumber when paired with like nuts and bolts.


A Subtle Hardware Detail That Holds It All Together

In the quiet choreography of a space, hardware is the unsung hero—and these zinc lock washers deliver steadfast poise. Their polished, silvery finish lends a clean, utilitarian accent while ensuring connections remain tight through daily rhythm and movement. Style them with brushed steel bolts on exposed shelving or architectural brackets for a cohesive, modern look. Consider them a small yet essential luxury—precision you can trust behind every beautiful installation.


Secure your projects with dependable, corrosion-resistant lock washers—add this 100-pack to your toolkit 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: 99760710004

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M
Mika Meeko
Los Angeles, US
★★★★★ 5
The fabric feels soft and noticeably comfortable against the skin
Color: White, Size: Queen
This is a zippered pillow protector made from a bamboo/polyester blend with a quilted surface. I’ve been using it for a few months on a standard queen pillow, including regular washing and everyday use. It’s also been exposed to dog hair, which I’ve been able to manage by vacuuming the surface. Pros The fabric feels soft and noticeably comfortable against the skin Breathable design helps keep the pillow from feeling overly warm Quilted texture adds a bit of cushioning without changing the pillow’s shape Zipper closure keeps the pillow fully enclosed and secure Holds up well after multiple washes Vacuuming the surface works well for removing pet hair Cons White fabric shows dirt and hair more easily between washes Slightly thicker than a basic pillowcase, which may not suit everyone Bamboo blend feel is smooth but not identical to 100% natural fabrics Bottom line: For me, this has been a comfortable, low-maintenance pillow protector that holds up well over time, especially useful if you want something breathable that can handle regular cleaning and pet hair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
R
Verified Purchase
r c.
Lexington, US
★★★★★ 4
Say goodbye to neck pain
Color: White, Size: Queen
This is a very good product but it takes some time to adjust removable stuffing to accommodate individual sleeping patterns.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
D
Dale Kim
Draper, US
★★★★★ 5
Soft and comfortable cooling pillowcase that gets the job done!
Color: White, Size: Queen, Color: White, Size: Queen
I got this quilted bamboo pillow protector (queen size) because I wanted a cleaner, cooler layer between my pillow and pillowcase since I’m always hot. This has been a great solution for that. The fabric feels soft and smooth, and it doesn’t make that crinkly noise some cooling pillowcases do. I’m a warm sleeper and the “cooling” aspect feels more like breathable than icy-cold, but it definitely sleeps more comfortably than the thick polyester protectors I’ve used in the past. The light quilting adds a little cushion without making my pillow feel bulky or changing the loft much. I like the fact that if you use a memory foam fill pillow you can add or remove some of the filling to make the pillow as firm or mushy as you want. This is especially helpful for people that are side sleepers vs people that need more neck support. The zipper is a big plus. Just be careful when zipping it open and closed as these are usually the first point of failure for pillowcases in my experience. It closes fully and keeps the protector snug so it doesn’t shift around inside the pillowcase, and it gives me peace of mind for sweat / oils and everyday wear. I’ve washed it and it came out fine with no weird shrinking, and the stitching still looks clean. For the price, it feels like good value if you’re trying to extend the life of a nicer pillow while keeping the sleep surface soft and breathable. It’s one of those small upgrades you don’t think about much once it’s on, which is kind of the point. It just works and helps me sleep more comfortably.
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Reviewed in the United States on January 1, 2026
C
Codescriber
West Palm Beach, US
★★★★★ 5
Soft and cooling
Color: White, Size: King, Color: White, Size: King
This pillow cover is great! Well made. Not too thin. Fits my queen pillow like a glove. Came out of the washing machine still looking brand new, with no zipper issues, which can happen with lower quality covers. Zero complaints.
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Reviewed in the United States on January 21, 2026
A
Anon-A-Mouse Reviewer
Alexandria, US
★★★★★ 5
Soft, Cooling Pillowcase That Smooths Out Chunky Filling
Color: White, Size: King, Color: White, Size: King
I accidentally ordered the king size instead of queen, but it still fits my shredded latex foam pillow fairly well and feels comfortable. The pillow has small but chunky latex shreds, and the added foam layer in this pillowcase not only smooths out those chunks but also adds a bit of extra thick comfort, making the pillow feel more uniform. ​ It seems to help with temperature regulation—if anything, it’s subtly cooler or at least not any warmer than my previous pillowcase. I’ve washed it twice so far, and it shows no wear and seems well built, so it should hold up over time and seems totally washable. Overall, it’s a very functional item, and compared with similar products, the value seems reasonable; I’m happy with the purchase and just wish I had ordered the right size. ​
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Reviewed in the United States on December 23, 2025

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