Whittet Higgins CNS18-16 One Piece Clampnut UNS 16 TPI Thread - Steel
- T 1.125-16
- D 1.875″
- B 0.500″
Genuine Whittet-Higgins product, Whittet-Higgins
- Regular price
- $17.01
- Sale price
- $17.01
- Regular price
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Quantity pricingApplied at checkout
- 20–49 5% off$16.16 ea
- 50–99 8% off$15.65 ea
- 100–199 15% off$14.46 ea
- 200–499 18% off$13.95 ea
- 500+ 25% off$12.76 ea
Same-day shipping
Order by 3 PM ET for same-day shipping
Free shipping on orders over $100
Use code at checkout.
Whittet-Higgins CNS18-16
$17.01
Why Apollo USA
Bearing locknuts and retaining parts from Apollo Industries, Oxford, Michigan
Apollo Industries supplies bearings, locknuts, lockwashers and maintenance tools to businesses across the US, with real people on the phone when you need a part matched.
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Same-day shipping
Order by 3 PM EST for same-day shipping.
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Free shipping over $100
All orders over $100 ship free by ground with code FREESHIP.
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90-day returns
Hassle-free returns on unused items within 90 days.
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Price match
Show us a competitor's advertised price on the same item and we will match it.
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Expert support
Support staff available by phone, web chat or email.
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Need tax exemption or quantity pricing?
We offer special rates for businesses and bulk orders.
Talk to a parts specialist
2695 Lake George RdOxford, MI 48370
Overview
Whittet-Higgins CNS18-16 Thread
The Whittet-Higgins CNS18-16 is a one-piece clampnut with a 16 threads-per-inch fine-pitch thread that threads directly onto a shaft or housing to position, retain, and preload bearings and other components. A tangential (X-axis) socket head clamp screw draws the nut tight against the mating shaft threads to create a mechanical self-locking joint.
This self-locking action resists loosening from vibration, shock, and torque without damaging the shaft threads and without cutting or repairing a keyway. The finer 16 TPI thread pitch delivers greater axial loading capacity and finer adjustment and preload in larger diameters, while installing easier and faster than a traditional locknut-and-lockwasher combination.
The base CNS is built from carbon steel with a hardened alloy clamp screw and a black oxide with wax finish to resist corrosion; stainless steel and aluminum alloy versions are also offered.
Key features
- One-piece clampnut with mechanical self-locking action; no separate lockwasher required
- 16 TPI fine thread pitch for greater axial loading capacity and finer adjustment and preloading in larger diameters
- Tangential (X-axis) socket head clamp screw provides convenient locking and adjusting access
- Resists loosening from vibration, shock, and torque without damaging the shaft threads
- Eliminates the need for cutting or repairing a shaft keyway
- Installs easier and faster than a traditional locknut and lockwasher
- Carbon steel base nut with hardened alloy clamp screw and black oxide with wax finish for corrosion resistance (stainless steel and aluminum alloy variants also offered)
- Maximum operating temperature of 300 Deg F
- Manufactured in the USA and RoHS compliant
Specifications
Whittet-Higgins CNS18-16 dimensions & specifications
- PDFCNS18-16 part print (opens in a new tab)
- STEP3D CAD model (opens in a new tab)
- PDFCNS series spec sheet (opens in a new tab)
Files from Whittet-Higgins. They open in a new tab.
- Type
- One-piece clampnut
- Thread T
- 1.125-16 (28.57 mm, 16 threads per inch)
- Outside diameter (max.) D
- 1.875 in (47.62 mm)
- Face diameter (max.) F
- 1.438 in (36.53 mm)
- Width (max.) B
- 0.500 in (12.70 mm)
- Theoretical axial load
- 27,400 lbf (121.9 kN)
- Socket head cap screw
- 1/4-28
- Suggested screw torque
- 150 in-lb (16.9 N·m)
- Material
- Carbon Steel (alloy fastener)
- Country of origin
- USA
- Series
- One-piece clampnut CNS series (16 TPI)
- Weight
- 0.24 lb
- Brand
- Whittet-Higgins
- Part number
- CNS18-16 also written CNS1816
- UPC / EAN
- 751968221838
Same size, other versions
Other versions of the CNS18-16
The same size in other Whittet-Higgins series: left-hand thread, stainless steel, high strength, precision or self-locking designs.
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$15.61
In stock
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$24.51
In stock
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Whittet-Higgins
BHI-04Whittet Higgins BHI-04 Bearhug Retaining Nut - 16 TPI Threads
Bearhug BHI series (16 TPI)
$17.61
In stock
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$12.87
In stock
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Whittet-Higgins
SNS18-16Whittet higgins SNS18-16 Splitnut UNS 16 TPI Thread - Steel
Two-piece clampnut SNS series (16 TPI)
$121.09
In stock
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Whittet-Higgins
SNS18-16SWhittet higgins SNS18-16S Splitnut UNS 16 TPI Thread - Stainless Steel
Two-piece clampnut SNS series (stainless)
$206.27
In stock
Part number explained
What every part of CNS18-16 means
- CNS
- One-piece clampnut, One-piece clampnut CNS series (16 TPI)
- 18-16
- Size 18-16: 1.125-16 thread
Catalogs & documents
Whittet-Higgins CNS18-16 catalogs & documents
Official catalogs and data from the manufacturer. They open as PDFs in a new tab.
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Product document
UNS 16 TPI Thread - Steel Catalog (opens in a new tab)
PDF · AllPagesDrop pages
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Catalog
Whittet-Higgins Handbook of Engineering & Design (rev. 2018) (opens in a new tab)
PDF · 93.0 MB · English
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Mounting
Whittet-Higgins Assembly Instructions (opens in a new tab)
PDF · 0.2 MB · English
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Safety
Whittet-Higgins Standard Statements: Prop 65, RoHS3, REACH (opens in a new tab)
PDF · 0.1 MB · English
About the brand
About Whittet-Higgins
Bearing locknuts, lockwashers and retaining devices from Rhode Island since 1914.
Henry Whittet and John Higgins founded the Whittet-Higgins Manufacturing Company in 1914 in the basement of a mill on Congress Avenue in Providence, Rhode Island, making super-precision bearing retaining components and machined parts for local machine builders such as Brown & Sharpe.
In 1967 the company was sold to a young mechanical engineer, and in 1969 it moved to 33 Higginson Avenue in Central Falls, Rhode Island, where it still makes its products. Its first line of 66 locknuts and lockwashers has grown to more than 4,300 standard parts, made on robotic CNC systems.
Besides the standard N/AN and KM locknuts with W and MB lockwashers, Whittet-Higgins makes its own self-locking designs: Bearhug prevailing-torque locknuts, Bearlok, Shoelok and Tangentlok clamping locknuts, clampnuts and splitnuts, plus adapter sets, clamp collars and installation tools. The company is family owned and operated.
Genuine Whittet-Higgins product from an authorized retailer
Founded
1914
Headquarters
Central Falls, Rhode Island, USA
Standard parts
More than 4,300
Made in
Central Falls, Rhode Island
Known for
- Bearing locknuts and lockwashers, inch and metric
- Bearhug self-locking locknuts
- Clampnuts, splitnuts and clamp collars
- Adapter sets and installation tools
Apollo Industries is an authorized Whittet-Higgins retailer. All Whittet-Higgins trademarks and product names are the property of their respective owners.
FAQ
CNS18-16 questions & answers
What size is the Whittet-Higgins CNS18-16?
The Whittet-Higgins CNS18-16 is a one-piece clampnut. Thread: 1.125-16 (28.57 mm, 16 threads per inch). Outside diameter: 1.875 in (47.62 mm). Face diameter: 1.438 in (36.53 mm). Width: 0.500 in (12.70 mm). These are Whittet-Higgins' maximum sizes from its spec sheet.
What thread does the CNS18-16 fit?
The Whittet-Higgins CNS18-16 fits a 1.125-16 right-hand shaft thread (28.57 mm, 16 threads per inch).
Does the CNS18-16 need a lockwasher?
No. The Whittet-Higgins CNS18-16 locks itself: a cap screw closes the nut's slit and clamps it onto the thread. It needs no lockwasher and no keyway in the shaft.
What temperature can the CNS18-16 take?
Whittet-Higgins rates the One-piece clampnut CNS series (16 TPI) for up to 300 °F (149 °C).
What is the CNS18-16 made of?
Base threaded nut: carbon steel; Fastener: hardened alloy.
Is there a drawing or CAD model of the CNS18-16?
Yes. Whittet-Higgins publishes a part print (PDF) and a 3D CAD model (STEP) for the CNS18-16. The drawing on this page is made from the same catalog dimensions.
How do I install the CNS18-16?
Follow Whittet-Higgins' assembly instructions for this part (PDF).
Is this a genuine Whittet-Higgins clampnut?
Yes. Apollo Industries is an authorized Whittet-Higgins retailer, and every Whittet-Higgins part we sell is genuine, made by Whittet-Higgins in Central Falls, Rhode Island, USA.
Do you ship the CNS18-16 the same day?
In-stock orders placed by 3 PM EST ship the same day. All orders over $100 ship free by ground with code FREESHIP.
Can I get quantity pricing or buy tax-exempt?
Yes. Apollo offers special rates for businesses and bulk orders. Use Request a quote on this page or call (248) 429-9073.
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