Back to main menu
Private Label
Protective Clothing
- Back to Shop by categories
- See all Protective Clothing
- Upper
  - Back to Protective Clothing
  - See all Upper
  - Sweaters & Jackets
  - Work Shirts
  - Aprons
  - Vests
- Lower
  - Back to Protective Clothing
  - See all Lower
  - Work Pants
  - Bib Overalls
- Coveralls & Sets
  - Back to Protective Clothing
  - See all Coveralls & Sets
  - Disposable
  - Fire Resistant
  - Insulated
- Accessories
  - Back to Protective Clothing
  - See all Accessories
  - Base Layers
  - Toques & Balaclavas
  - Neck Gaiters
  - Hard Hat Liners
- Hi-Vis
- Welding
- Ergonomics
- Other Clothing
- Rainwear
Hand Protection
- Back to Shop by categories
- See all Hand Protection
- Coated
- Leather
- Synthetic
- Impact Resistant
- Anti-Vibration
- Knit / Cotton
- Safety Sleeves
- Arc Flash Protection
- Mitts
- Welding
- Disposable
Foot Protection
- Back to Shop by categories
- See all Foot Protection
- Rubber Boots
- Boot Liners
- Traction Aids
- Temporary Protection
- Work Boots & Shoes
Hearing Protection
- Back to Shop by categories
- See all Hearing Protection
- Earplugs
  - Back to Hearing Protection
  - See all Earplugs
  - Disposable
  - Reusable
  - Dispensers
- Banded
- Earmuffs
  - Back to Hearing Protection
  - See all Earmuffs
  - Standard
  - Electronic
Head & Face Protection
- Back to Shop by categories
- See all Head & Face Protection
- Hard Hats
  - Back to Head & Face Protection
  - See all Hard Hats
  - Full Brim
  - Cap Style
- Hard Hat Accessories
  - Back to Head & Face Protection
  - See all Hard Hat Accessories
  - Earmuffs
  - Suspensions
  - Chin Straps
  - Holders
  - Sweat Bands
- Face Shields
  - Back to Head & Face Protection
  - See all Face Shields
  - Visor Brackets
  - Replacement Visors
- Protective Hoods
- Welder's Feceshields
  - Back to Head & Face Protection
  - See all Welder's Feceshields
  - Masks
Eye Protection
- Back to Shop by categories
- See all Eye Protection
- Safety Glasses
- Goggles
- Glasses Accessories
  - Back to Eye Protection
  - See all Glasses Accessories
  - Inserts For Prescription Lenses
- Cleaning Products
  - Back to Eye Protection
  - See all Cleaning Products
  - Lens Cleaning Wipes
  - Lens Cleaning Solutions
  - Lens Cleaning Stations
Respiratory Protection
- Back to Shop by categories
- See all Respiratory Protection
- Disposable Respirators
- Reusable Respirators
  - Back to Respiratory Protection
  - See all Reusable Respirators
  - Full-Face Respirators
  - Half-Mask Respirators
  - Cartridges & Filters
- Powered Air Purifying Systems (PAPR)
  - Back to Respiratory Protection
  - See all Powered Air Purifying Systems (PAPR)
  - Complete Kits
  - Hoods & Helmets
  - Breathing Tubes & Adapters
  - Cartridges & Filters
  - Accessories
- Self Contained Breathing Apparatus
  - Back to Respiratory Protection
  - See all Self Contained Breathing Apparatus
  - Accessories
  - Complete SCBA Units
  - Facepieces
  - Cylinders & Assemblies
  - Cases
- Supplied Air Breathing Apparatus
  - Back to Respiratory Protection
  - See all Supplied Air Breathing Apparatus
  - Complete SABA Units
  - Cylinders & Assemblies
  - Cases
- Quantitative Fit Testing
  - Back to Respiratory Protection
  - See all Quantitative Fit Testing
  - Fit Testing Machines
  - Adapters & Accessories
- Qualitative Fit Testing
  - Back to Respiratory Protection
  - See all Qualitative Fit Testing
  - Kits
  - Adapters & Accessories
- Escape Solutions
  - Back to Respiratory Protection
  - See all Escape Solutions
  - Escape Kits
- Air Carts
  - Back to Respiratory Protection
  - See all Air Carts
  - Cylinders & Assemblies
  - Air Line Hoses & Accessories
- Grade-D Filtration
  - Back to Respiratory Protection
  - See all Grade-D Filtration
  - Filtration Systems
  - Air Line Hoses & Accessories
- Breathing Air Assemblies
  - Back to Respiratory Protection
  - See all Breathing Air Assemblies
  - Regulators
- Confined Space Ventilation
  - Back to Respiratory Protection
  - See all Confined Space Ventilation
  - Non-Hazardous Location Blowers & Kits
  - Hazardous Location Blowers & Kits
  - Venturi Style Blowers
  - Accessories
- Cylinder Storage Solutions
- Cleaning & Disinfecting
Instrumentation
- Back to Shop by categories
- See all Instrumentation
- Portable Gas Detection
  - Back to Instrumentation
  - See all Portable Gas Detection
  - Single or Two Gas Detectors
  - Multi-Gas Detectors
  - Sampling Monitors
  - Area Monitoring
  - Test & Calibration Stations
  - Gas Cylinders & Regulators
  - Additional Accessories
Fall Protection
- Back to Shop by categories
- See all Fall Protection
- Full Body Harnesses
- Body Belts
- Lanyards
  - Back to Fall Protection
  - See all Lanyards
  - Energy Absorbing Lanyards
  - Restraint & Positioning Lanyards
- Self Retracting Lanyards
- Lifelines
  - Back to Fall Protection
  - See all Lifelines
  - Temporary Horizontal Lifelines
  - Rope Lifelines
  - Vertical Systems
  - Cable & Rope Grabs
- Anchorage Connectors & Hardware
- Confined Space Equipment
  - Back to Fall Protection
  - See all Confined Space Equipment
  - Kits
  - Tripods
  - Davit Arms & Masts
  - Davit Arm Bases
  - Davit Accessories
  - Winches
- Rescue & Descent Devices
  - Back to Fall Protection
  - See all Rescue & Descent Devices
  - Descenders
  - Pulleys
  - Kits
  - Escape Systems
- Roofing Solutions
  - Back to Fall Protection
  - See all Roofing Solutions
  - Kits
  - Anchors
- General Accessories
  - Back to Fall Protection
  - See all General Accessories
  - Carabiners
  - Tool Tethers
  - Tool Holders
  - Harness Accessories
  - Carrying Bags
First Aid
- Back to Shop by categories
- See all First Aid
- Eyewash Stations
  - Back to First Aid
  - See all Eyewash Stations
  - Portable eyewash stations
- First Aid Kits
  - Back to First Aid
  - See all First Aid Kits
  - British Columbia Kits
  - Alberta Kits
  - Ontario Kits
  - Burn Kits
  - Speciality Kits
- First Aid Supplies
- Emergency Equipment
- AED Supplies
  - Back to First Aid
  - See all AED Supplies
  - Defibrillators
  - Pads
  - Batteries
  - Cabinets
  - Additional Accessories
Lockout - Tagout
- Back to Shop by categories
- See all Lockout - Tagout
- Safety Locks
- Additional Accessories
  - Back to Lockout - Tagout
  - See all Additional Accessories
  - Tags
Road Safety
- Back to Shop by categories
- See all Road Safety
- Cones & Markers
  - Back to Road Safety
  - See all Cones & Markers
  - Traffic Cones
  - Traffic Markers
- Road Safety Accessories
  - Back to Road Safety
  - See all Road Safety Accessories
  - Barricades & Accessories
  - Flags & Accessories
  - Traffic Triangles
  - Flasher Lights
  - Speed Bumps
- Cargo Restraint
- Additional Accessories
Signage & Tape
- Back to Shop by categories
- See all Signage & Tape
- General Signage
  - Back to Signage & Tape
  - See all General Signage
  - No Smoking
- Tape
Environmental Protection
- Back to Shop by categories
- See all Environmental Protection
- Absorbents
  - Back to Environmental Protection
  - See all Absorbents
  - Sorbent Pillow
  - Granular Absorbent
  - Sorbent Sheets & Pads
  - Sorbent Socks
- Spill Kits
- Additional Accessories
Handling & Storage
- Back to Shop by categories
- See all Handling & Storage
- Safety Cans & Containers
  - Back to Handling & Storage
  - See all Safety Cans & Containers
  - Outdoor Ashtray Stands
Other Protection Products
- Back to Shop by categories
- See all Other Protection Products
- Signal Flares, Bangers & Horns
- Cases
Industrial Supply
- Back to Shop by categories
- See all Industrial Supply
- Abrasives
- Adhesives / Oils / Chemicals
- Tapes
- Power Tools
- Welding
- Industrial Supply for Ergonomics
Fire / Rescue
- Back to Shop by categories
- See all Fire / Rescue
- Gloves
  - Back to Fire / Rescue
  - See all Gloves
  - Extrication Gloves
  - Structural Gloves
- Hoods
- Boots
  - Back to Fire / Rescue
  - See all Boots
  - Structural Boots
  - Wildland Boots
- Helmets
  - Back to Fire / Rescue
  - See all Helmets
  - Structural Helmets
  - Wildland Helmets
- Hoses & Nozzles
- Turnout Gear
  - Back to Fire / Rescue
  - See all Turnout Gear
  - Lower
- Station Wear
  - Back to Fire / Rescue
  - See all Station Wear
  - Base Layers
- Hazmat
  - Back to Fire / Rescue
  - See all Hazmat
  - Decontamination Equipment
- Hardware
  - Back to Fire / Rescue
  - See all Hardware
  - Couplings/Adapters/Tools
  - Valves
  - Suction Hose & Strainers
  - Ladders
- Lighting
  - Back to Fire / Rescue
  - See all Lighting
  - Flashlights
  - Headlamps
  - Helmet Lights
  - Scene Lights
- SCBAs & Communications
  - Back to Fire / Rescue
  - See all SCBAs & Communications
  - NFPA SCBAs
- Foam
  - Back to Fire / Rescue
  - See all Foam
  - Foam Agents
- Rescue/Extrication
  - Back to Fire / Rescue
  - See all Rescue/Extrication
  - Airbags & Struts
  - Forcible Entry Tools
- Ventillation
  - Back to Fire / Rescue
  - See all Ventillation
  - Battery Powered Blowers/Fans
  - Gas Powered Blowers/Fans
  - Ventillation Accessories
- Thermal Imaging Cameras
- Wildland Equipment
  - Back to Fire / Rescue
  - See all Wildland Equipment
  - Wildland Hoses
  - Wildland Pumps
- Wildland Clothing
  - Back to Fire / Rescue
  - See all Wildland Clothing
  - Base Layers
- Extinguishers
  - Back to Fire / Rescue
  - See all Extinguishers
  - Extinguishers
  - Accessories & Parts

Ship to

Your Delivery Method

My Account

Bill to {{vm.session.billTo.firstName}} {{vm.session.billTo.lastName}} ({{vm.session.billTo.customerNumber}} {{vm.session.billTo.properties.guillevin_LegacyAccountNumber}}) Change Account

Sign Out

My Cart

99 + items

Home
Safety
Lockout - Tagout
Safety Locks
BLIND FLANGE LOCKOUT DEVICE, MEDIUM

Master Lock

BLIND FLANGE LOCKOUT DEVICE, MEDIUM

MLO-S3923 MFG #: S3923

MLO-S3923_1 - d9fa4708-61dd-434a-8409-ea85843fd61f.jpg

Best Seller: False
Dangerous Goods: False
Discontinued: False
Featured Product: False
Green Product: False
Limited Quantity: False
Made in Canada: False
Manufacturer: MASTER LOCK
Mfr Vendor ID: 245
Oversize product: False
Restricted Delivery: False
SPF Product ID: 2296221
Web Group: 3110100000000

The Master Lock No. S3923 Blind Flange Lockout device is a physical, best practice solution for pipeline maintenance. The adjustable cup allows for a secure fit that conceals and locks out access to nuts holding a blind in place. Workers can perform maintenance with confidence that the blind they placed on a pipeline will not be removed until all workers have removed their padlocks. 4 locking holes allow for multiple workers to lockout device at one time.