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Circuit Breaker Lockout Rings & Tags

From $2.65 to $6.70
Description Tag Ring Color / Tag Color PN Price Buy
Circuit Breaker Lockout Ring
S4933959-501
--Red / --
11-04463
$2.65
Quantity
Circuit Breaker Lockout Ring
S4933959-503
--Yellow / --
11-14695
$2.65
Quantity
Circuit Breaker Lockout Ring
S4933959-505
--Blue / --
11-14696
$2.65
Quantity
Circuit Breaker Lockout Ring
S4933959-507
--Black / --
11-14697
$6.50
Quantity
Circuit Breaker Lockout
S4933959-521
Remove Before FlightRed / Red
11-04464
$6.60
Quantity
Circuit Breaker Lockout
S4933959-523
Remove Before FlightYellow / Red
11-14698
$6.70
Quantity
Circuit Breaker Lockout
S4933959-525
Remove Before FlightBlue / Red
11-14699
$5.65
Quantity
Circuit Breaker Lockout
S4933959-527
Remove Before FlightBlack / Red
11-14700
$5.65
Quantity
Circuit Breaker Lockout
S4933959-531
Inoperative Do Not OperateRed / Red
11-04465
$6.60
Quantity
Circuit Breaker Lockout
S4933959-533
Inoperative Do Not OperateYellow / Red
11-14701
$5.75
Quantity
Circuit Breaker Lockout
S4933959-535
Inoperative Do Not OperateBlue / Red
11-14702
$5.90
Quantity
Circuit Breaker Lockout
S4933959-537
Inoperative Do Not OperateBlack / Red
11-14703
$5.85
Quantity
Subtotal $0.00
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Overview

These Circuit Breaker Safety Locks with & without tags. Prevents the inadvertent closing of circuit breakers connected to equipment that is under repair or removed from the aircraft. Easily installed flush to the panel so they won't accidentally be knocked off during maintenance and removed from Klixon and similar type circuit breakers.

All S4933959-Series lockout rings are the only Lockout devices that have FAA-PMA approval and are issued with 8130-3 Tag for use during flight along with FAA Standard Maintenance Support Hardware approved for ground maintenance also.
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Reviews

Good quick lock for Klixon Circuit Breakers, but no good for the Tyco W23 Circuit Breakers (for which these were bought).

Mark B
May 19, 2014

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do these circuit breaker locks fit all standard circuit breakers?

These come in one size and they fit most standard circuit breakers. Per the supplier: "Easily installed and removed from Klixon and similar type circuit breakers."

Q: What are the dimensions of these circuit breaker locks?

3/8" diameter x 1/4" length.

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