SMC ‘NFPA Aluminum Locking D’

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Product Overview

Like our Mountain D and Light D Series carabiners the asymmetrical frame is slightly flattened for an increased strength-to-weight ratio, internal components are stainless steel, and the locking sleeve engages on the gate not on the carabiner frame to help prevent jamming or vibrating loose.

SMC assures that all carabiners are 100% visually and physically inspected. Our attention to detail and precision craftsmanship guarantees you receive the highest level of quality, value and flawless performance insuring your carabiners are amongst the finest in the world. The Locking D is offered in five colors, Bright, Black, Purple, Orange and Red. Purple, Red and Orange versions feature a color anodized frame with bright gate and sleeve.

Also available as non-NFPA Certified for environments that require strong high quality connectors such as sport climbing and mountaineering.

  • UL certified to NFPA 1983 “T” Technical Use
  • Simple design uses minimum number of parts / components providing for excellent and reliable functionality.
  • Modified D shape provides for larger gate opening.
  • Sleeve locks on gate not the frame, resulting in greater reliability and less jamming.
  • The frame is slightly flattened for increased strength-to-weight.
  • Pins are flush-mounted with gate for virtually snag-free operation.
  • Manufactured using high quality aluminum for light weight, durability and strength.
  • Available in Bright , Black, Purple, Orange and Red.
  • Made in the USA.

 Certified by Underwriter’s Laboratories to exceed the NFPA 1983 “T” – Technical Use requirement of 27kN.

All SMC NFPA products are stamped with the required certification information and the user information is enclosed with each item as required by NFPA.
  • Model #: NFPA18501 (Bright), 02 (Black), 05 (Red)
  • Material: High Quality Aluminum
  • Finish: Polished or Anodized
  • Dimensions: 4.37” x 2.56”
  • Gate opening: .82”
  • Weight: 2.6 oz (74g)
  • 3 Sigma test:
    • Major axis– 27kN
    • Minor axis– 7kN
    • Gate open– 7kN
  • NFPA1983 Certified
  • Made In USA


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