CrowCrowCrow
CrowCrowCrow
Search products...
My Orders
Cart

Looking for an imported product?

We can arrange it. Send the name or a store link on WhatsApp — we'll check if we can source it and quote the all-in India price.

WhatsApp Us
CrowCrowCrow

Free Shipping

Eligible orders across India

Secure Packaging

Factory-sealed, damage-safe

About

  • About CrowCrowCrow
  • How It Works
  • Careers
  • Press & Media
  • Sustainability
  • Blog & Guides
  • Why Choose CrowCrowCrow

Buyer Help

  • Contact Us
  • Track Order
  • Customs & Duties
  • Size Guide
  • Payment Options
  • FAQs
  • Buyer Protection

Our Policies

  • Privacy Policy
  • Shipping Policy
  • Terms and Condition
  • Return and Refunds Policy

Programs & B2B

  • Rewards ProgramSoon
  • Refer a FriendSoon
  • Student DiscountSoon
  • Affiliate ProgramSoon
  • Wholesale & B2B
  • Corporate Gifting
  • Free Tools
  • Price Match

Connect With Us

Payment Methods

Visa
Mastercard
RuPay
Amex
UPI
Google Pay
PhonePe
Paytm

Shipping Partners

BluedartDelhiveryExpressBoxIndia Post
Cookie Policy··Disclaimer·DMCA·MCP for AI·Authenticity·Money-Back·Security

© 2026 Color Papers India Private Limited

Help us give you a better experience. We use cookies to remember your cart, speed up checkout, and show you authentic US products worth importing. You stay in control — your data is handled per India's DPDP Act 2023. Cookie Policy

Locknuts
  1. Home
  2. Industrial & Scientific
  3. Fasteners
  4. Nuts
  5. Locknuts
  6. Hard-to-Find Fastener 3/8"-16…
Hard-to-Find Fastener

Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance

4.8
(95 Ratings)
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance - main product image
All-inclusive price — duties & taxes paid, no customs charges at delivery
₹4,490₹6,680

You save ₹2,190 (33%)

33% off the seller list price

Qty
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance — 6-32
6-32
₹1,510
₹1,650
In Stock
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance — 10-24
10-24
₹3,200
₹4,610
In Stock
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance — 1
1
₹4,490
₹6,680
In Stock

Doorstep delivery by 26 Oct - 28 Oct from USA

Add on Google

Tested and Trusted · Always Original & 100% Imported

View trust tables•Know about trust badges
100% Authentic
100% Authentic
Factory-Sealed
Factory-Sealed
All Duties Included
All Duties Included
GST Invoice Issued
GST Invoice Issued
ExpressBox Tracked
ExpressBox Tracked
Secure Payments
14-Day Smile Guarantee
14-Day Smile Guarantee

Secure Your Projects with Vibration-Proof Fastening

About this item

Hard-to-Find Fastener 3/8"-16 nylon insert lock nuts provide a secure locking design, preventing loosening from vibration, shock, or heavy loads. Manufactured from hardened steel with a zinc-plated finish, these nuts offer superior durability and corrosion resistance for demanding applications. Imported from authorized US retailers and authorized brand partners, all customs duties and GST are included in the price.

The coarse thread and hexagonal design ensure high shear resistance, making them suitable for automotive, industrial, and heavy machinery projects. Each nut features a built-in nylon collar and is compatible with a standard 9/16" wrench for easy installation. The yellow zinc finish provides a clean appearance and protects against rust and wear.

These lock nuts are an excellent choice for projects in India requiring reliable fastening. They offer a durable alternative to standard nuts, ensuring long-lasting performance even under high-torque conditions. Delivery is handled via ExpressBox for secure transit.

Key Features

  • Secure Locking Design: Built-in nylon collar prevents loosening caused by vibration, shock, or heavy loads
  • Coarse Thread & Hexagonal Design: The heavier threading provides higher shear resistance for secure fastening in joints. Compatible with standard 9/16" wrench for easy installation.
  • Premium Strength: Manufactured from hardened steel for superior durability and high-torque applications
  • Corrosion Protection: The zinc plated yellow finish coating delivers corrosion resistance to rust and wear, ensuring long-lasting performance and a clean, bright appearance
  • Versatile Use: Ideal for automotive, industrial, and heavy machinery projects requiring maximum fastening security
  • Diameter: 3/8"
  • Material: Steel
  • Finish: Zinc
  • Driver Type: 9/16 Wrench
  • Thread Type: 16 (Coarse)

Why choose this product

Engineered for Secure Fastening

These Hard-to-Find Fastener lock nuts are engineered with a nylon insert that creates friction, preventing self-loosening under vibration. Unlike standard nuts that can loosen over time, these are designed for critical applications in automotive, industrial, and heavy machinery. The hardened steel construction ensures they can handle high torque without failure. Imported from authorized US retailers and authorized brand partners, they offer a reliable solution for projects demanding maximum fastening security and durability.

Who Should Use These Nuts

Ideal for mechanics, engineers, and DIY enthusiasts working on vehicles, industrial equipment, or machinery where vibration is a concern. Suitable for applications requiring a 3/8"-16 coarse thread and a 9/16" wrench. Skip if you require a fine thread, a different material like brass, or a nut without a nylon insert for high-temperature applications exceeding 250°F (121°C).

How to use

  • Prepare the Bolt — Ensure the bolt or threaded rod has the correct 3/8"-16 coarse thread and is clean. The bolt should be long enough to pass through the components and allow the nut to be fully threaded.
  • Thread the Lock Nut — Place the lock nut onto the bolt threads. Hand-tighten it as far as possible. The nylon insert will initially resist turning.
  • Tighten with Wrench — Using a 9/16" wrench, tighten the nut further. Continue turning until the nylon collar is past the threads it needs to grip, ensuring a snug and secure fit that resists loosening.

Example scenarios

Typical situations where Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

A mechanic in Chennai is repairing a commercial vehicle that experiences heavy vibrations during operation.

How this product helps

Using these 3/8"-16 nylon insert lock nuts ensures critical components remain securely fastened, preventing potential failures caused by constant vibration. The hardened steel and zinc plating offer durability for demanding automotive use.

2
Scenario 2
Illustrative example
Where it helps

An industrial plant in Pune needs to secure machinery parts that are subject to constant movement and shock.

How this product helps

These lock nuts provide a reliable solution with their vibration-resistant nylon collar, maintaining joint integrity under stress. The 100-pack offers good value for large-scale industrial projects.

Specifications & installation

Specifications

Locking MechanismNylon Insert
Primary MaterialHardened Steel
Protective FinishZinc Plating

Installation & usage

ApplicationAutomotive, Industrial, Heavy Machinery Projects
Thread StandardCoarse
Recommended Wrench Size9/16"
Maximum Operating Temperature250°F (121°C) for nylon insert
Cost per nut100 nuts in pack: ₹44.90 per nut

How we compare

FeatureHard-to-Find Fastener 3/8"-16Others
Locking MechanismNylon Insert (prevents loosening from vibration)Standard nuts (may loosen with vibration) or specialized locknuts (varies by brand)
Material & FinishHardened Steel with Yellow Zinc Plating (corrosion resistant)Varies; often plain steel or basic zinc plating (corrosion resistance may differ)
Thread Specification3/8"-16 Coarse Thread (Class 2A)May vary; check for metric M10 or imperial equivalents (thread class may differ)
Quantity & Value100-Pack — ₹44.90 per nut per nutOften sold in smaller packs (e.g., 10-20 pcs) or individually; price varies significantly
Application SuitabilityAutomotive, Industrial, Heavy Machinery (high vibration)General purpose fastening; specialized locknuts for specific industrial needs

Product details

SKUbxv1635
GTIN0014973284886
BrandHard-to-Find Fastener
Model Number014973284886
Set NameSet of 100
Item Package Quantity1
Number of Pieces100
Thread Size3/8"-16 (Coarse)
Thread TypeCoarse
Thread ClassClass 2A
MaterialHardened Steel (Alloy Steel)
Finish TypeZinc
ColorSilver
Item ShapeHexagonal
Driver Type9/16 Wrench
Item Weight0.821 kg (1.81 lb)
Package Dimensions11.99 cm x 7.49 cm x 5.41 cm (4.72 in x 2.95 in x 2.13 in)
Country of OriginNot stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

About Hard-to-Find Fastener

Hard-to-Find Fastener specializes in providing a wide range of industrial and specialty fasteners, including lock nuts, bolts, and screws, for demanding applications.

Compliance & Legal

No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.

Customer Reviews

Share your experience

Bought this from CrowCrowCrow? Other buyers want to hear how it went.

No reviews from buyers in India yet. Be the first to share your experience!

FAQ, See What Others Asked

What thread size and standard does this nut use?
This nut features a 3/8"-16 coarse thread standard. Ensure this matches the bolt or screw you are connecting for a secure fit. The thread class is 2A.
What material is this nut made from?
These lock nuts are manufactured from hardened alloy steel for superior strength and durability, with a yellow zinc-plated finish for corrosion resistance.
How does the nylon insert prevent loosening?
The built-in nylon collar creates friction against the bolt threads, effectively preventing the nut from loosening due to vibration, shock, or heavy loads.
What is the best use for these lock nuts?
They are ideal for automotive, industrial, and heavy machinery projects where secure fastening and resistance to vibration are critical requirements.
Can I use these nuts in high-temperature environments?
The nylon insert is rated for temperatures up to 250°F (121°C). For applications exceeding this, consider lock nuts with different locking mechanisms or materials.
How to choose the right lock nut for my project?
Consider the thread size (3/8"-16 coarse here), material (hardened steel with zinc plating), locking mechanism (nylon insert), and the specific application's vibration and temperature requirements.
Are these nuts suitable for plumbing applications in India?
These are industrial-grade lock nuts, not typically used for standard plumbing connections which often require specific pipe threads like BSP or NPT. Verify thread compatibility for your specific plumbing needs.
What are the benefits of using lock nuts over standard nuts?
Lock nuts provide enhanced security by resisting loosening caused by vibration, shock, or dynamic loads, ensuring a more reliable and long-lasting connection compared to standard nuts.

Frequently bought together

Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance

This item:

Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance

₹4,490

Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance

This item

Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance

₹4,490

Total price:

₹9,740

You save ₹5,140 (35%) Extra

3 items selected

3 items

₹9,740

You save ₹5,140 (35%) Extra

Product Comparison

Attributes
Current
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration Resistance
Hard-to-Find Fastener 3/8"-16 Nylon Insert Lock Nuts 100-Pack | Secure Locking Design for Vibration ResistanceBuy Now
Quartet Clear Round Rare Earth Magnets 1/2" Diameter, 6 Pack | Strong Hold for Glass Whiteboards
Quartet Clear Round Rare Earth Magnets 1/2" Diameter, 6 Pack | Strong Hold for Glass WhiteboardsBuy Now
uxcell MR126-2RS Deep Groove Ball Bearings 6mm x 12mm x 4mm | Double Sealed Chrome Steel (10 Pcs)
uxcell MR126-2RS Deep Groove Ball Bearings 6mm x 12mm x 4mm | Double Sealed Chrome Steel (10 Pcs)Buy Now
ALKOO Sky Blue Stethoscope Carrying Case with Internal Mesh Pockets & Elastic Slots | Professional Healthcare Organizer
ALKOO Sky Blue Stethoscope Carrying Case with Internal Mesh Pockets & Elastic Slots | Professional Healthcare OrganizerBuy Now
SmartSign "Notice - This Area Is Under 24 Hour Video Surveillance" Sign | 17.8 cm x 25.4 cm (7" x 10") Aluminum | Durable & Laminated
SmartSign "Notice - This Area Is Under 24 Hour Video Surveillance" Sign | 17.8 cm x 25.4 cm (7" x 10") Aluminum | Durable & LaminatedBuy Now
Gorilla Super Glue Gel Tube, 3ml (0.1 Fl Oz) x 5 Pack | Fast-Drying Cyanoacrylate Adhesive for Tough Repairs
Gorilla Super Glue Gel Tube, 3ml (0.1 Fl Oz) x 5 Pack | Fast-Drying Cyanoacrylate Adhesive for Tough RepairsBuy Now
Smart Weigh GEM30 Milligram Jewelry Scale 30g x 0.001g | Professional Precision for Gold, Gems, Medicine & Lab
Smart Weigh GEM30 Milligram Jewelry Scale 30g x 0.001g | Professional Precision for Gold, Gems, Medicine & LabBuy Now
Spec
Price
₹4,490
₹6,680
₹3,530
₹5,450
₹1,720
₹2,750
₹2,300
₹3,920
₹1,980
₹3,160
₹3,960
₹5,410
₹9,190
₹14,240
Rating
4.80(95)
4.50(1,036)
4.70(294)
4.70(1,645)
4.60(73)
4.50(304)
4.40(5,688)
Brand NameHard-to-Find FastenerQuartetuxcellALKOOSmartSignGORILLASmart Weigh
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹4,490₹6,680

You Save ₹2,190

Estimated delivery: Doorstep delivery by 26 Oct - 28 Oct from USA
Add on Google
Visa
Mastercard
Google Pay
UPI
15-Point QC Passed
😊14-Day Smile Guarantee

Fast Shipping

Secure Packaging

14-Day Returns*

Quality & authenticity

Security & Privacy

Safe payments
Secure privacy

Delivery guarantee

Tracked from USA · duties included
Not delivered in 90 days? Full refund*
Damaged? Covered*

*Genuine defect, damage, wrong item or non-delivery, reported within 14 days; refund after inspection. Conditions

Your Order Journey: From Purchase to Doorstep

You Order
Place your order
USA Warehouse dispatch
Packed & shipped
International Air Shipping
Fast transit
Consignment to India Warehouse
Customs cleared
Doorstep delivery
Delivered to you
You Order
Place your order
USA Warehouse dispatch
Packed & shipped
International Air Shipping
Fast transit
Consignment to India Warehouse
Customs cleared
Doorstep delivery
Delivered to you

Why shop with us

Crowcrowcrow: The Only Safe Lane for US-Market Exclusives

One price. One payment. No surprises.

High risk

Buying Direct

Recommended

Crowcrowcrow

Safe Lane

vs
₹13,470+ (3× the price)
₹4,490 locked, all-in
Hard to get the original US version in India
Original US version, shipped to your door
Extra pay for Import Duties, GST, and forex fees
One price in INR, no customs charges at delivery
4–12 weeks · No tracking
13-15 days · live tracking
Grey market, no guarantee, no protection, no refund
100% authentic US, India-verified, return available
Lost in transit = ₹0 back
Full protection included