KATO LockOne®

KATO LockOne® is a revolutionary positive locking fastener designed to prevent a standard nut from loosening free under vibration. Upon installation, LockOne coils stretch, providing a superior locking force. Unlike nuts with nylon or locking compounds, LockOne does not degrade with each use. Due to the unique LockOne design, the assembly is FOD free. Save on assembly cost! No expensive replacement nuts! LockOne’s lightweight design is perfect for use on weight sensitive applications. KATO LockOne replaces nylon nuts, double nuts (jam nuts), cotter pins, safety-wire, and thread locking compounds.

LockOne fasteners underwent 30,000 cycle accelerated vibration testing in accordance with NAS3350 (National Aerospace Specification for impact type vibration test). In fact, even after 180,000 cycles the LockOne assembly remained intact!

See LockOne in Action

LockOne “How To” Guide

KATO LockOne

Thread Size LockOne Pack Qty Per Pack 12PT-Socket (Ref.)
Unified Coarse
1/4-20 KLOC-4P 10 7/16
5/16-18 KLOC-5P 10 1/2
3/8-16 KLOC-6P 10 9/16
7/16-14 KLOC-7P 10 11/16
1/2-13 KLOC-8P 10 3/4
5/8-11 KLOC-10P 6 15/16
3/4-10 KLOC-12P 2 1-1/8
7/8-9 KLOC-14P 2 1-5/16
1-8 KLOC-16P 2 1-1/2
Unified Fine
10-32 KLOF-3P 10 3/8
1/4-28 KLOF-4P 10 7/16
5/16-24 KLOF-5P 10 1/2
3/8-24 KLOF-6P 10 9/16
7/16-20 KLOF-7P 10 11/16
1/2-20 KLOF-8P 10 3/4
5/8-18 KLOF-10P 6 15/16
3/4-16 KLOF-12P 2 1-1/8
1-12 KLOF-16P 2 1-1/2
Metric Sizes
M4X.7 KLOM-4P 10 7mm
M5X.8 KLOM-5P 10 8mm
M6X1 KLOM-6P 10 10mm
M8X1.25 KLOM-8P 10 13mm
M10X1.5 KLOM-10P 10 17mm
M12X1.75 KLOM-12P 10 19mm
M16X2 KLOM-16P 6 24mm
M20X2.5 KLOM-20P 2 30mm
M22X2.5 KLOM-22P 2 32mm
M24X3 KLOM-24P 2 36mm

KLOC-KIT

Thread Size Qty Per Pack 12PT-Socket (Ref.)
Unified Coarse
1/4-20 10 7/16
5/16-18 10 1/2
3/8-16 10 9/16
7/16-14 10 11/16
1/2-13 10 3/4
5/8-11 10 15/16
3/4-10 6 1-1/8
7/8-9 4 1-5/16
1-8 2 1-1/2

KLOF-KIT

Thread Size Qty Per Pack 12PT-Socket (Ref.)
Unified Fine
10-32 10 7/16
1/4-28 10 1/2
5/16-24 10 9/16
3/8-24 10 11/16
7/16-20 10 3/4
1/2-20 10 15/16
5/8-18 6 1-1/8
3/4-16 6 1-5/16
1-12 2 1-1/2

KLOM-KIT

Thread Size Qty Per Pack 12PT-Socket (Ref.)
Metric Sizes
M4X.7 10 7mm
M5X.8 10 8mm
M6X1 10 10mm
M8X1.25 10 13mm
M10X1.5 10 17mm
M12X1.75 10 19mm
M16X2 6 24mm
M20X2.5 4 30mm
M22X2.5 4 32mm
M24X3 2 36mm

Frequently Asked Questions (FAQs)

What is KATO LockOne®?

KATO LockOne® is a stainless steel locking device designed to keep standard hex nuts securely fastened, even in high-vibration environments. It installs quickly over the nut and bolt without requiring special tools, adhesives, or modifications to the fastener, making it an efficient solution for preventing loosening.

Does LockOne® require special installation tools?

No. LockOne® is designed for quick and simple installation using standard hand tools. No drilling, adhesives, safety wire, or specialized equipment is required, allowing maintenance personnel to install or remove the locking device efficient.

Does LockOne® damage the bolt or nut?

No. LockOne® locks the fastener mechanically without modifying or damaging the bolt or nut. This allows the original fasteners to remain in service while still benefiting from reliable vibration resistance.

What industries commonly use LockOne®?

LockOne® is used across a wide range of industries, including aerospace, automotive, industrial manufacturing, heavy equipment, rail, marine, energy, telecommunications, and maintenance operations. It is well suited for applications where vibration can cause conventional fasteners to loosen over time.

What is your cancellation/refund policy?

Our cancellation policy allows you to cancel your subscription at any time through your account settings. Regarding refunds, our policy is we offer a 30-day money-back guarantee. Please refer to our Terms of Service Page for complete details.

What are your hours of operation?

Our standard hours of operation are Monday to Friday, 9:00 AM to 5:00 PM in Pacific Standard Time (PST).

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