Newport Fasteners 5/16 Inch - 18 x 1-1/4 Inch Hex Cap Screws 316 Stainless Steel 100 Pack Fully Threaded
Why you'll like it
- Superior Corrosion Resistance — Made from 316 stainless steel with molybdenum for excellent protection against salt water and chemicals.
- Precise Dimensional Standards — Manufactured strictly to ASME B18.2.1 specifications featuring a hex head with an integrated washer face.
- Fully Threaded Design — Coarse UNC threads run the entire length for maximum grip and versatile application.
- Bulk Quantity — Convenient 100 pack ensures you have enough reliable fasteners for large projects and maintenance repairs.
Product details
Description
Upgrade your industrial, marine, or outdoor projects with high-performance marine-grade fasteners engineered for exceptional durability in harsh environments. Manufactured from austenitic 316 stainless steel containing molybdenum, these components provide superior resistance to chloride, salt water, and chemical exposure compared to standard 18-8 alloys.
Each fastener features a precise six-sided head with an integrated washer face and a chamfered point, designed to meet rigorous ASME B18.2.1 dimensional tolerances. The coarse UNC thread pattern and full threading along the entire length ensure secure fastening, maximum clamping force, and reliable performance in demanding applications.
How to use
- Select the appropriate pre-drilled or tapped hole matching the 5/16-18 thread size.
- Align the hex head cap screw and drive using a compatible wrench or socket tool, applying torque evenly until securely seated against the mating surface.
Ingredients
316 Stainless Steel (Austenitic alloy containing chromium, nickel, and molybdenum)
As printed by the brand. Check the pack label if you have an allergy.
Specifications
| Brand | Newport Fasteners |
|---|---|
| EAN | 8945136588379 |
| Ships from | USA (sourced directly), checked in Navi Mumbai |
| Sold by | Dropy.in |
Ratings & reviews
From our customers
Top reviews first: highest rated, with photos first
- Amit D.5 ★
ekdum mast threads
mi amchya workshop madhe gate repair sathi he 100 pack wale bolts vaparle. threads ekdum clean aahet, nut lavtana kay pan problem ala nahi, smooth firto var paryant. marine grade aslyamule pani lagla tari corrosion nahi honar. packing pan changli hoti.
- Siddharth R.4 ★
works as expected
Decent hardware, fits the 18 threads per inch requirement perfectly for my rack setup.
- Vikram M.4 ★
kaam chalau aur strong
mera ek colleague bol raha tha ki ye wale screws try karle boat rack ke liye. 5/16 inch size aur full threading ki wajah se nuts ko adjust karna bada aasan ho gaya. delivery thodi late aayi thi par product solid hai.
- Rohan M.4 ★
good for outdoor brackets
Got these for my son's outdoor telescope stand project in the balcony. The 316 stainless steel material is holding up nicely against the humidity and rain without any rust spots so far. Only thing is the plain finish gets scratched up a bit when you tighten them hard with a wrench, but functionality wise they do the job well.
FAQs
What is the difference between a hex bolt and a hex cap screw?
Hex cap screws feature a machined washer face under the head and a chamfered point, whereas standard hex bolts typically do not include a washer face and have different manufacturing tolerances.
Are these screws suitable for marine environments?
Yes, these fasteners are made from 316 stainless steel containing molybdenum, which provides exceptional resistance to salt water, coastal air, and chemical corrosion.
What does fully threaded mean for this product?
Fully threaded means the coarse UNC threads run continuously along the entire length of the fastener from beneath the head to the tip.
Are these authentic USA-imported products available on Dropy India?
Yes, this is an authentic USA-imported product sourced directly by Dropy India to ensure genuine manufacturing quality.
What standards do these fasteners follow?
These cap screws are manufactured to meet ASME B18.2.1 specifications for dimensional accuracy and reliability.
How long will delivery take?
Most orders arrive in 15–20 days: we source each product directly from the USA, check it at our Navi Mumbai warehouse and pack it on video. Items marked Dropy Express ship from our India warehouse and arrive in 3–5 days.
Is cash on delivery available?
Full cash on delivery is available all over India on Dropy Express items. For other orders from ₹2,499 to ₹15,000 you can use Partial COD: pay 25% online now and the rest in cash on delivery.
Are your products genuine?
Yes. Every product is 100% authentic, sourced directly from the USA, quality-checked and packed on video at our Navi Mumbai warehouse.
What if my order arrives damaged or wrong?
Write to us at [email protected] as soon as it arrives. Damaged, wrong or not as described, our Buyer Protection gives you a full refund. The details are in our Return, Refund & Cancellation Policy.
Is delivery free?
Delivery is free on orders from ₹1,499. Below that a ₹79 delivery fee applies.