Original: $44.65
-65%$44.65
$15.63The Story
DMM Ultra D Locksafe ANSI – North American Certified D-Shape Carabiner
The DMM Ultra D Locksafe ANSI (SKU: K337ANSI) is the North American compliance version of DMM's flagship D-shaped carabiner. With a 16 kN minor axis MBS — the highest in its class — and certification to ANSI/ASSE Z359.12-2019 and CAN/CSA Z259.12-16, this is the go-to choice for arborists and climbers working under strict ANSI fall protection requirements.
Key Features
- ANSI/ASSE Z359.12-2019 certified for North American fall protection compliance
- CAN/CSA Z259.12-16 certified for Canadian compliance
- 16 kN minor axis MBS — highest minor axis strength in the Ultra D lineup
- Locksafe autolocking gate for hands-free, secure closure
- Pronounced D-shape forces loading along the major axis for maximum strength
- Perfect for lanyard terminations and primary connection points
Specifications
- SKU: K337ANSI
- Dimensions: 66 x 113mm
- Weight: 100g
- MBS Major Axis: 30 kN
- MBS Minor Axis: 16 kN
- MBS Gate Open: 9 kN
- Gate Opening: 16mm
- Gate Type: Locksafe (autolocking)
- Certifications: EN 362:2004 B, EN 12275:2013 B, ANSI/ASSE Z359.12-2019, CAN/CSA Z259.12-16
- Vendor: DMM
D-Shaped Carabiner Comparison
| Feature |
Husqvarna D $19.99 |
RockD Autolock $28.50 |
RockD Orca $30.50 |
DMM Ultra D Locksafe $40.95 |
DMM Ultra D ANSI $44.65 |
|---|---|---|---|---|---|
| MBS Major Axis | 30 kN | 29 kN | 29 kN | 30 kN | 30 kN |
| MBS Minor Axis | 7 kN | 11 kN | 11 kN | 12 kN | 16 kN |
| MBS Gate Open | 7 kN | 9 kN | 9 kN | 9 kN | 9 kN |
| Gate Type | Double-lock twist | 3-stage autolock | Orca-lock | Locksafe | Locksafe |
| Key-Lock Nose | ✓ | ✓ | ✓ | ✓ | ✓ |
| Gate Opening | High capacity | 0.95" (24mm) | 0.95" (24mm) | 22mm | 16mm |
| Weight | 0.35 lb | 2.85 oz (80g) | 2.85 oz (80g) | 84g | 100g |
| Certifications | EN 362, ANSI Z133 | CE | CE | EN 362, EN 12275 | EN 362, EN 12275, ANSI/ASSE Z359.12, CAN/CSA Z259.12 |
| Price | $19.99 | $28.50 | $30.50 | $40.95 | $44.65 |
Frequently Asked Questions
What is the difference between this and the standard Ultra D Locksafe?
The ANSI version has a higher minor axis MBS (16 kN vs. 12 kN), meets ANSI/ASSE Z359.12-2019 and CAN/CSA Z259.12-16, and weighs slightly more (100g vs. 84g). The trade-off is a smaller gate opening (16mm vs. 22mm).
Do I need the ANSI version for arborist work in the US?
It depends on your employer's requirements and applicable regulations. ANSI Z133 is the arborist-specific standard — verify which certifications your safety program requires before purchasing.
Is the gate opening smaller on the ANSI version?
Yes — 16mm vs. 22mm on the standard Locksafe. If you need a wider gate opening, consider the standard Ultra D Locksafe or the Rock Exotica RockD options.
Related Products
- DMM Ultra D Locksafe (Standard)
- Husqvarna D Carabiner
- Rock Exotica RockD Autolock
- Rock Exotica RockD Orca Auto Lock
- Browse All Aluminum Carabiners
- Browse All Autolocking Carabiners
Description
DMM Ultra D Locksafe ANSI – North American Certified D-Shape Carabiner
The DMM Ultra D Locksafe ANSI (SKU: K337ANSI) is the North American compliance version of DMM's flagship D-shaped carabiner. With a 16 kN minor axis MBS — the highest in its class — and certification to ANSI/ASSE Z359.12-2019 and CAN/CSA Z259.12-16, this is the go-to choice for arborists and climbers working under strict ANSI fall protection requirements.
Key Features
- ANSI/ASSE Z359.12-2019 certified for North American fall protection compliance
- CAN/CSA Z259.12-16 certified for Canadian compliance
- 16 kN minor axis MBS — highest minor axis strength in the Ultra D lineup
- Locksafe autolocking gate for hands-free, secure closure
- Pronounced D-shape forces loading along the major axis for maximum strength
- Perfect for lanyard terminations and primary connection points
Specifications
- SKU: K337ANSI
- Dimensions: 66 x 113mm
- Weight: 100g
- MBS Major Axis: 30 kN
- MBS Minor Axis: 16 kN
- MBS Gate Open: 9 kN
- Gate Opening: 16mm
- Gate Type: Locksafe (autolocking)
- Certifications: EN 362:2004 B, EN 12275:2013 B, ANSI/ASSE Z359.12-2019, CAN/CSA Z259.12-16
- Vendor: DMM
D-Shaped Carabiner Comparison
| Feature |
Husqvarna D $19.99 |
RockD Autolock $28.50 |
RockD Orca $30.50 |
DMM Ultra D Locksafe $40.95 |
DMM Ultra D ANSI $44.65 |
|---|---|---|---|---|---|
| MBS Major Axis | 30 kN | 29 kN | 29 kN | 30 kN | 30 kN |
| MBS Minor Axis | 7 kN | 11 kN | 11 kN | 12 kN | 16 kN |
| MBS Gate Open | 7 kN | 9 kN | 9 kN | 9 kN | 9 kN |
| Gate Type | Double-lock twist | 3-stage autolock | Orca-lock | Locksafe | Locksafe |
| Key-Lock Nose | ✓ | ✓ | ✓ | ✓ | ✓ |
| Gate Opening | High capacity | 0.95" (24mm) | 0.95" (24mm) | 22mm | 16mm |
| Weight | 0.35 lb | 2.85 oz (80g) | 2.85 oz (80g) | 84g | 100g |
| Certifications | EN 362, ANSI Z133 | CE | CE | EN 362, EN 12275 | EN 362, EN 12275, ANSI/ASSE Z359.12, CAN/CSA Z259.12 |
| Price | $19.99 | $28.50 | $30.50 | $40.95 | $44.65 |
Frequently Asked Questions
What is the difference between this and the standard Ultra D Locksafe?
The ANSI version has a higher minor axis MBS (16 kN vs. 12 kN), meets ANSI/ASSE Z359.12-2019 and CAN/CSA Z259.12-16, and weighs slightly more (100g vs. 84g). The trade-off is a smaller gate opening (16mm vs. 22mm).
Do I need the ANSI version for arborist work in the US?
It depends on your employer's requirements and applicable regulations. ANSI Z133 is the arborist-specific standard — verify which certifications your safety program requires before purchasing.
Is the gate opening smaller on the ANSI version?
Yes — 16mm vs. 22mm on the standard Locksafe. If you need a wider gate opening, consider the standard Ultra D Locksafe or the Rock Exotica RockD options.
Related Products
- DMM Ultra D Locksafe (Standard)
- Husqvarna D Carabiner
- Rock Exotica RockD Autolock
- Rock Exotica RockD Orca Auto Lock
- Browse All Aluminum Carabiners
- Browse All Autolocking Carabiners
