Whittet Higgins NSHM-40 Shoelok Tangential Locking Retaining Nut
- T M200 × 3
- D 249.9 mm
- B 38.1 mm
Genuine Whittet-Higgins product, Whittet-Higgins
- Regular price
- $1,168.73
- Sale price
- $1,168.73
- Regular price
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Quantity pricingApplied at checkout
- 20–49 5% off$1,110.29 ea
- 50–99 8% off$1,075.23 ea
- 100–199 15% off$993.42 ea
- 200–499 18% off$958.36 ea
- 500+ 25% off$876.55 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 NSHM-40
$1,168.73
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 NSHM-40 Locknut
The Whittet-Higgins NSHM Series Shoelok is a metric, mechanically self-locking bearing retaining nut machined entirely from hardened alloy. It threads onto a shaft or spindle and locks by means of three tangential socket-head cap screws that, when torqued in a bolt-circle pattern, press three internally threaded locking shoes radially inward against the shaft threads, providing uniform 360-degree clamping to the center of the shaft without damaging the threads.
Tangential (X-axis) access lets the assembly be locked and adjusted from the side, making the Shoelok ideal for positioning and retaining bearings and other components on high-speed, high-precision assemblies with infinite preload adjustment. The hardened-alloy construction delivers high axial loading capacity and resists loosening from vibration, shock, and torque. The NSHM Series meets and exceeds ISO 2982-2:2013(E) and is manufactured in the USA.
Key features
- Hardened alloy base threaded nut, locking shoes, and fasteners for high axial loading capacity
- Mechanically self-locking via three tangential socket-head cap screws torqued in a bolt-circle pattern
- Internally threaded shoes press radially inward for uniform 360-degree thread clamping to the center of the shaft
- Tangential (X-axis) access for locking and adjustment of the assembly
- Infinite adjustment and preloading capability; does not damage shaft threads when secured
- Resists loosening due to vibration, shock, and torque; balanced for high-speed applications
- Maximum operating temperature 300 degrees F
- Meets and exceeds ISO 2982-2:2013(E)
- Manufactured in USA and RoHS compliant
Specifications
Whittet-Higgins NSHM-40 dimensions & specifications
- PDFNSHM-40 part print (opens in a new tab)
- STEP3D CAD model (opens in a new tab)
- PDFNSHM series spec sheet (opens in a new tab)
Files from Whittet-Higgins. They open in a new tab.
- Type
- Shoelok locknut
- Thread T
- M200 × 3 (pitch 3 mm)
- Outside diameter (max.) D
- 249.9 mm (9.839 in)
- Face diameter (max.) F
- 232.7 mm (9.161 in)
- Width (max.) B
- 38.1 mm (1.500 in)
- Theoretical axial load
- 4,718 kN (1,060,649 lbf)
- Hex set screw
- 7/16-14
- Suggested screw torque
- 400 in-lb (45.2 N·m)
- Material
- Carbon Steel (alloy fastener)
- Country of origin
- USA
- Series
- Shoelok NSHM series (metric)
- Standard
- ISO 2982-2:2013 meets and exceeds
- Weight
- 10.98 lb
- Brand
- Whittet-Higgins
- Part number
- NSHM-40 also written NSHM40
- UPC / EAN
- 751968154006
Same size, other versions
Other versions of the NSHM-40
The same size in other Whittet-Higgins series: left-hand thread, stainless steel, high strength, precision or self-locking designs.
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$1,367.27
In stock
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$829.42
In stock
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$767.98
In stock
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$276.55
In stock
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Whittet-Higgins
KMS-40Whittet Higgins KMS-40 Retaining Nut M200 x 3.0
Locknut KMS series (stainless)
$3,228.30
Call for availability
Part number explained
What every part of NSHM-40 means
- NSHM
- Shoelok locknut, Shoelok NSHM series (metric)
- 40
- Size 40: M200 × 3 thread
Catalogs & documents
Whittet-Higgins NSHM-40 catalogs & documents
Official catalogs and data from the manufacturer. They open as PDFs in a new tab.
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Product document
Catalog Shoelok – NSHM Series (Metric) (opens in a new tab)
PDF · AllPagesDrop pages
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Product document
Assembly Instructions (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
NSHM-40 questions & answers
What size is the Whittet-Higgins NSHM-40?
The Whittet-Higgins NSHM-40 is a Shoelok locknut. Thread: M200 × 3 (pitch 3 mm). Outside diameter: 249.9 mm (9.839 in). Face diameter: 232.7 mm (9.161 in). Width: 38.1 mm (1.500 in). These are Whittet-Higgins' maximum sizes from its spec sheet.
What thread does the NSHM-40 fit?
The Whittet-Higgins NSHM-40 fits a M200 × 3 right-hand shaft thread (pitch 3 mm).
Does the NSHM-40 need a lockwasher?
No. The Whittet-Higgins NSHM-40 locks itself: set screws press hardened locking shoes against the shaft thread. It needs no lockwasher and no keyway in the shaft.
What temperature can the NSHM-40 take?
Whittet-Higgins rates the Shoelok NSHM series (metric) for up to 300 °F (149 °C).
What is the NSHM-40 made of?
Base threaded nut: hardened alloy; Locking shoes: hardened alloy; Fasteners: hardened alloy.
Is there a drawing or CAD model of the NSHM-40?
Yes. Whittet-Higgins publishes a part print (PDF) and a 3D CAD model (STEP) for the NSHM-40. The drawing on this page is made from the same catalog dimensions.
How do I install the NSHM-40?
Follow Whittet-Higgins' assembly instructions for this part (PDF).
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 NSHM-40 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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