Stainless steel fasteners
The exact fastener, priced by the pack.
1,233+ bolts, screws, nuts, washers, pins and rivets in 18-8 and 316 stainless, brass and bronze — every spec published, every price ladder shown, no minimum on in-stock items.
Have the part in hand? Use the camera button to search by photo.
- Free US shipping
- Every order, no minimum
- Ships in 1–2 days
- On in-stock items
- 30-day returns
- Unused, original packaging
- Volume pricing
- Published on every listing
Catalog
Shop by category
Built for the way you buy
Whether it's a bag for today's job or a case for the PO.
Contractors & installers
Small packs for the job in hand, free US shipping on every order, and in-stock parts out the door in 1–2 business days.
- Packs from 5 pieces — no case minimum on stocked items
- Stainless for exterior, deck and marine work
- Free shipping, no minimum order
Maintenance & repair
Replacing a part you have in your hand? Match it by size, head and drive — or photograph it and let the search identify it.
- Filter to one SKU by thread, length, head and drive
- Head dimensions and drive sizes on every row
- Photo search names the part for you
Purchasing & procurement
The whole price ladder is on the page, so a quote is a lookup, not a phone call. Case quantities and custom packs on request.
- Per-piece price at every pack size, before checkout
- Bulk-only production packs at wholesale ($500 cart minimum)
- Quotes for case quantities and parts we don't list
Pricing
Volume pricing, shown up front.
The whole ladder sits on the product page: the per-piece price at every pack size, before you add anything to the cart. No account to see it, no quote to wait on, no fees at checkout. Tiers apply automatically.
Live price ladder
#14 Hex Washer Type AB Stainless Steel 18-81/2"
| Pack size | Per piece | Savings |
|---|---|---|
| 5 pcs | $2.45/ea | — |
| 10 pcs | $1.35/ea | −45% |
| 25 pcs | $0.66/ea | −73% |
| 100 pcs | $0.30/ea | −88% |
| 250 pcs | $0.24/ea | −90% |
90% lower per piece across these tiers.
In stock
Ready to ship in 1–2 business days
| Product | Material | From |
|---|---|---|
| #14 Hex Washer Type AB Stainless Steel 18-85 sizes | SS 18-8 | $12.25/5pk |
| 3/8-16 Button Head Socket Cap Screws Fully Threaded Stainless Steel 18-817 sizes | SS 18-8 | $33.28/100pk |
| 5/16-18 Button Head Socket Cap Screws Fully Threaded Stainless Steel 18-817 sizes | SS 18-8 | $32.77/250pk |
| Blind Rivet Large Flange Aluminum Open End13 sizes | Aluminum 5052 | $11.99/5pk |
| Blind Rivet Dome Head Aluminum Open End28 sizes | Aluminum 5052 | $11.25/5pk |
| 1/4-20 Socket Head Cap Screws Fully Threaded Stainless Steel 18-811 sizes | SS 18-8 | $8.66/5pk |
| 1/4-20 Button Head Socket Cap Screws Fully Threaded Stainless Steel 18-820 sizes | SS 18-8 | $10.99/5pk |
| #12 x 1-1/4" Phillips Pan Head Self Drilling Tek Screws Stainless Steel 410 | SS 410 | $12.25/5pk |
Specifications
Every spec published before you buy.
No guessing from a photo and a title. Each listing carries the full technical record, so you can check the part against your drawing or the one you are replacing.
- Material and grade (18-8 / A2-70, 316 / A4-70, 410, brass, bronze)
- Finish — plain, zinc, yellow zinc, hot-dip galvanized, black oxide
- Thread size and pitch, in imperial and metric
- Head style, drive type, and length
- Package quantity and per-piece weight
Ordering
How ordering works.
Step 1
Find the exact part
Search by size or part number, or filter a category by diameter, thread pitch, length, head style, drive and material until one SKU is left.
Step 2
Verify the specification
Every listing publishes material, grade, finish, thread and drive type, so you can check the part against your drawing before you buy.
Step 3
Choose your quantity
The full price ladder is on the product page: the per-piece price at every pack size, before you add to cart.
Step 4
Check out securely
Payment is processed by Stripe over an encrypted connection. Free US shipping, and in-stock orders ship within 1–2 business days.
Guides
Not sure what you need?
Who you are buying from
A real business standing behind every order.
Fastenio is a US fastener supplier. Here is exactly who you are buying from and what is protected when you order.
Secure checkout by Stripe
Payments are processed by Stripe over an encrypted connection. Your card details are never stored on our servers.
30-day returns
Unused items in original packaging can be returned within 30 days of delivery. Return policy.
Free US shipping
Free standard shipping on every US order, with no minimum order value. Shipping details.
Published specifications
Every listing publishes material, grade, finish, thread size, and drive type so you can verify the part before you buy.
Transparent volume pricing
The full price ladder is shown on the product page before checkout — the per-piece price at every pack size, with no hidden fees.
Talk to a person
Reach us by phone, email, or live chat during business hours — a real person answers.
Business information
- Registered address
- 63 Acorn Lane, Levittown, NY 11756
- info@fastenio.com
- Phone
- +1 (347) 256-6338
Read our Privacy Policy and Terms of Service.
Support
Frequently asked questions
Have another question? Contact us or browse our technical specs and buying guides.
- Do I have to buy in bulk?
- Most products are available in small packs starting at 5 pieces, with automatic volume discounts as quantity increases. Some products are marked Bulk-Only — those ship in single production packs at bulk pricing and may become available in smaller packs as our inventory expands. Look for the Bulk-Only badge on the catalog and product pages.
- What material are your fasteners?
- Our catalog is primarily 18-8 (A2-70) and 316 (A4-70) stainless steel, plus 410 stainless, brass, silicon bronze, low-carbon steel, and aluminum on select items. Each product listing shows the exact material, grade, and finish.
- How do I find the right size?
- Type a size like 1/4-20 x 1 into the search box, or open a category and filter by diameter, thread pitch, length and head style. Each product page lists full dimensional and technical specifications.
- Do you offer volume pricing?
- Yes. Every product page shows tiered pricing. The per-unit cost decreases automatically as you increase the quantity.
- What is your return policy?
- We accept returns within 30 days of delivery for unused items in original packaging. See our returns page for full details.
Trusted by contractors, maintenance teams, and procurement buyers.
A small pack for a weekend repair or case quantities for a commercial project — exact sizes, published specs, and automatic volume pricing.