Whittet Higgins NI-11 Locknut
- T 2.000-16
- D 3.000″
- B 0.510″
Genuine Whittet-Higgins product, Whittet-Higgins
- Regular price
- $24.44
- Sale price
- $24.44
- Regular price
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Quantity pricingApplied at checkout
- 20–49 5% off$23.22 ea
- 50–99 8% off$22.48 ea
- 100–199 15% off$20.77 ea
- 200–499 18% off$20.04 ea
- 500+ 25% off$18.33 ea
Same-day shipping
Order by 3 PM ET for same-day shipping
Free shipping on orders over $100
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Whittet-Higgins NI-11
$24.44
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?
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2695 Lake George RdOxford, MI 48370
Overview
Whittet-Higgins NI-11 Locknut
The Whittet-Higgins NI-11 is a bearing locknut from the NI series, threaded 16 threads per inch in the National Fine thread series for finer assembly adjustment and accurate angular positioning across numerous locking positions. Machined from carbon steel, it is used together with a matching WI series lockwasher, whose tab bends into a nut slot to secure, lock, and retain bearings and power transmission assemblies and to prevent loosening from vibration, shock, and torque.
Engineered for high axial loading applications, the NI-11 installs with no special tools and works effectively on both soft and hardened shafts. It is rated for operating temperatures up to 300°F, is manufactured in the USA, and is RoHS compliant.
Key features
- Carbon steel construction
- 16 threads per inch (National Fine thread series) for finer assembly adjustment
- Matched with WI series lockwashers to secure, lock, and retain bearings
- Provides accurate angular positioning with numerous locking positions
- Prevents loosening due to vibration, shock, and torque
- Designed for high axial loading applications
- No special tools required for installation; effective on soft and hardened shafts
- Maximum operating temperature 300°F
- Manufactured in the USA and RoHS compliant
Specifications
Whittet-Higgins NI-11 dimensions & specifications
- PDFNI-11 part print (opens in a new tab)
- STEP3D CAD model (opens in a new tab)
- PDFNI series spec sheet (opens in a new tab)
Files from Whittet-Higgins. They open in a new tab.
- Type
- Locknut
- Thread T
- 2.000-16 (50.80 mm, 16 threads per inch)
- Outside diameter (max.) D
- 3.000 in (76.20 mm)
- Face diameter (max.) F
- 2.688 in (68.28 mm)
- Width (max.) B
- 0.510 in (12.95 mm)
- Theoretical axial load
- 55,800 lbf (248.2 kN)
- Material
- Carbon Steel
- Country of origin
- USA
- Series
- Locknut NI series (16 TPI)
- Standard
- ANSI/ABMA 8.2-1999 meets and exceeds
- Weight
- 0.52 lb
- Brand
- Whittet-Higgins
- Part number
- NI-11 also written NI11
- UPC / EAN
- 751968531104
Use it with
Parts and tools for your NI-11
What Whittet-Higgins pairs with the NI-11. Tick what you need and add it with one click.
Same size, other versions
Other versions of the NI-11
The same size in other Whittet-Higgins series: left-hand thread, stainless steel, high strength, precision or self-locking designs.
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Whittet-Higgins
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One-piece clampnut CNS series (16 TPI)
$32.45
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Whittet-Higgins
SNS32-16Whittet higgins SNS32-16 Splitnut UNS 16 TPI Thread - Steel
Two-piece clampnut SNS series (16 TPI)
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Whittet-Higgins
SNS32-16SWhittet higgins SNS32-16S Splitnut UNS 16 TPI Thread - Stainless Steel
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Part number explained
What every part of NI-11 means
- NI
- Locknut, Locknut NI series (16 TPI)
- 11
- Size 11: 2.000-16 thread
Catalogs & documents
Whittet-Higgins NI-11 catalogs & documents
Official catalogs and data from the manufacturer. They open as PDFs in a new tab.
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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
NI-11 questions & answers
What size is the Whittet-Higgins NI-11?
The Whittet-Higgins NI-11 is a locknut. Thread: 2.000-16 (50.80 mm, 16 threads per inch). Outside diameter: 3.000 in (76.20 mm). Face diameter: 2.688 in (68.28 mm). Width: 0.510 in (12.95 mm). These are Whittet-Higgins' maximum sizes from its spec sheet.
What thread does the NI-11 fit?
The Whittet-Higgins NI-11 fits a 2.000-16 right-hand shaft thread (50.80 mm, 16 threads per inch).
Does the NI-11 need a lockwasher?
Yes. Whittet-Higgins matches the NI-11 with the WI-11 lockwasher. The washer's inner tab sits in the shaft's keyway, and after tightening one of its outer tangs is bent into a slot of the locknut so the nut cannot turn.
What temperature can the NI-11 take?
Whittet-Higgins rates the Locknut NI series (16 TPI) for up to 300 °F (149 °C).
What is the NI-11 made of?
Locknut: carbon steel.
Is there a drawing or CAD model of the NI-11?
Yes. Whittet-Higgins publishes a part print (PDF) and a 3D CAD model (STEP) for the NI-11. The drawing on this page is made from the same catalog dimensions.
How do I install the NI-11?
Follow Whittet-Higgins' assembly instructions for this part (PDF). Fit the lockwasher with its inner tab in the shaft keyway, tighten the locknut to the bearing maker's preload, then bend the nearest tang into a slot.
Is this a genuine Whittet-Higgins locknut?
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 NI-11 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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