Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3M DBI-SALA Manhole Collar, 21 1/2 in Diameter, Green, Aluminum, Clamp-On Base - Davit System Bases
3M DBI-SALADavit System Bases

3M DBI-SALA Manhole Collar, 21 1/2 in Diameter, Green, Aluminum, Clamp-On Base

The 3M DBI-SALA Manhole Collar is a green, aluminum davit system base with a 21 1/2 in diameter, designed for clamp-on mounting to manhole openings. It is compatible with a Lower Mast Extension and serves as the…

SKU 3G-OTH-545721

Brand
3M DBI-SALA
Item
Manhole Collar, 21 1/2 in Diameter, Green, Aluminum, Clamp-On Base
Category
Davit System Bases
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

3M DBI-SALA
Manufacturer Part Number
8510457
Type
21 1/2 in dia.: 21 1/2 in, Manhole Mnt, Lower Mast Extension, Green, Base
Material
Aluminum
Color
Green
Mounting Type
Clamp-On
Compatible Component
Lower Mast Extension
Confined Space Component
Base

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

3M DBI-SALA Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The 3M DBI-SALA Manhole Collar is a green, aluminum davit system base with a 21 1/2 in diameter, designed for clamp-on mounting to manhole openings. It is compatible with a Lower Mast Extension and serves as the confined space base component (MPN 8510457).

Frequently Asked Questions

What is the 3M DBI-SALA Manhole Collar used for?

The 3M DBI-SALA Manhole Collar (MPN 8510457) is a confined-space davit system base designed for clamp-on mounting to manhole openings. It supports a Lower Mast Extension to create a secure anchor point for fall-protection and rescue operations in utility vaults, sewers, and similar vertical-entry environments.

What are the specifications of the 3M DBI-SALA Manhole Collar?

This green aluminum base has a 21 1/2 in diameter and uses a clamp-on mounting type. It is compatible with a Lower Mast Extension and is classified as a confined-space base component. The manufacturer part number is 8510457, and the brand is 3M DBI-SALA.

Where to buy the 3M DBI-SALA Manhole Collar worldwide?

3G Electric supplies the 3M DBI-SALA Manhole Collar (8510457) to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this confined-space davit system base.

How to install the 3M DBI-SALA Manhole Collar?

Installation requires clamp-on mounting to a manhole opening with a 21 1/2 in diameter. Ensure the collar is centered and securely tightened per the manufacturer's instructions. Always attach the Lower Mast Extension before use and follow confined-space entry safety protocols.

Used in

Common applications for 3M DBI-SALA
Construction — 3M DBI-SALA full-body harnesses for fall arrest on scaffolding and steel structures.
Oil and gas — 3M DBI-SALA harnesses for confined space rescue and work at height on rigs.
Utilities — 3M DBI-SALA harnesses for tower climbing and pole-top work with positioning D-rings.
Manufacturing — 3M DBI-SALA harnesses for overhead crane maintenance and elevated platform access.
Fire service — 3M DBI-SALA harnesses for technical rescue operations meeting NFPA 1983 standards.

3M DBI-SALA Products

3G Electric supplies 3M DBI-SALA davit system bases. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from 3M DBI-SALA

View all 3M DBI-SALA parts
This clamp-on aluminum base is designed for mounting on 29 1/2 in manways to support a lower mast extension in confined space davit systems. It provides a secure anchoring point for fall protection and rescue equipment during entry operations
3M DBI-SALA
This clamp-on aluminum base is designed for mounting on 29 1/2 in manways to support a lower mast extension in confined space davit systems. It provides a secure anchoring point for fall protection and rescue equipment during entry operations
Bolt-on floor-mount davit system base with 12 1/2 in length. Provides 360° davit mast rotation. Zinc-plated silver finish. Compatible with lower mast extension and davit arms. Used for confined space fall protection and rescue
3M DBI-SALA
Bolt-on floor-mount davit system base with 12 1/2 in length. Provides 360° davit mast rotation. Zinc-plated silver finish. Compatible with lower mast extension and davit arms. Used for confined space fall protection and rescue
This green aluminum davit system base has a 23 1/2 in diameter and uses a clamp-on mounting for manhole rims. It is designed to accept a lower mast extension, providing a secure foundation for confined space entry and fall protection equipment
3M DBI-SALA
This green aluminum davit system base has a 23 1/2 in diameter and uses a clamp-on mounting for manhole rims. It is designed to accept a lower mast extension, providing a secure foundation for confined space entry and fall protection equipment
This clamp-on aluminum base is designed for mounting on 27 1/2 in manways to support a lower mast extension in confined space davit systems. The green anodized finish provides corrosion resistance. Typical applications include vertical entry and retrieval in manholes, tanks, and vaults
3M DBI-SALA
This clamp-on aluminum base is designed for mounting on 27 1/2 in manways to support a lower mast extension in confined space davit systems. The green anodized finish provides corrosion resistance. Typical applications include vertical entry and retrieval in manholes, tanks, and vaults
This green aluminum davit system base has a 19 1/2 in diameter and is designed for manhole mounting via a clamp-on attachment. It is compatible with a lower mast extension and serves as the base component for confined-space entry and retrieval systems
3M DBI-SALA
This green aluminum davit system base has a 19 1/2 in diameter and is designed for manhole mounting via a clamp-on attachment. It is compatible with a lower mast extension and serves as the base component for confined-space entry and retrieval systems
This clamp-on aluminum base is designed for mounting on 25.5-inch manways as part of a davit system. It serves as a confined-space base compatible with a lower mast extension, providing a secure anchor point for entry and retrieval operations
3M DBI-SALA
This clamp-on aluminum base is designed for mounting on 25.5-inch manways as part of a davit system. It serves as a confined-space base compatible with a lower mast extension, providing a secure anchor point for entry and retrieval operations
This bolt-on floor mount sleeve is a davit system base for confined space access. It accepts a lower mast extension and supports davit arms. Silver finish, 10 in length. Compatible with davit arms and lower mast extensions
3M DBI-SALA
This bolt-on floor mount sleeve is a davit system base for confined space access. It accepts a lower mast extension and supports davit arms. Silver finish, 10 in length. Compatible with davit arms and lower mast extensions
This wall-mounted davit system base is designed for use with lower mast extensions and davit arms in confined space entry applications. The bolt-on mounting provides a secure anchoring point for fall-protection systems. Silver finish, 10 in length
3M DBI-SALA
This wall-mounted davit system base is designed for use with lower mast extensions and davit arms in confined space entry applications. The bolt-on mounting provides a secure anchoring point for fall-protection systems. Silver finish, 10 in length