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Yes, you can wash a carabiner with warm water and mild soap. Never use solvents, bleach, or a dishwasher, and always inspect and relubricate the gate before putting it back on your harness. If the gate still sticks after a proper clean, retire it. The Short Answer (and the One That Actually Matters) You can and should wash your carabiners. Cleaning doesn’t weaken the 7075-T6 aluminum, and mild soap won’t eat the anodized finish. The point of washing isn’t sterility. It’s restoring the mechanical function of the gate spring and clearing abrasive grit out of the locking sleeve threads. Petzl, Black Diamond, and DMM all explicitly recommend washing sticky gear. A carabiner that doesn’t snap shut automatically is a critical safety hazard, full stop. Washing removes the physical crud preventing that closure. Quick Reference: Carabiner Cleaning Do: Wash in warm water, max 30°C / 86°F. Do: Use mild dish soap (pH 6 to 8). Do: Lubricate the gate hinge after drying. Don’t: Use bleach or acid. Don’t: Run them through the dishwasher. Ever. Don’t: Use standard WD-40. What’s Actually on Your Carabiner (and What Each Contaminant Does) Different environments deposit different gunk. What’s gumming up the gate dictates how aggressively

TL;DR: Inspect in four stages: spine and body for cracks, grooves deeper than 1mm, or deformation; gate for a clean snap-shut with no lag; locking mechanism for full thread engagement; nose and keylock for burrs. Retire immediately if any defect shows up, or after a hard fall onto rock or concrete that changes how the gate behaves. The 90-Second Field Check Every Climber Should Run Before Tying In A pre-climb carabiner inspection isn’t complicated, but it has to be systematic. Petzl and DMM both publish formal PPE inspection protocols, and if you strip them down, you end up with a four-step field check that takes about a minute and a half. Run this before you leave the ground: Look (20 seconds): Scan the frame, spine, and nose for cracks, corrosion, or sharp edges. Check the rope-bearing surfaces for grooves. Feel (20 seconds): Run a thumb along the inner basket and nose. You’re hunting for burrs or any sharp lip that could slice a loaded rope. Listen (20 seconds): Open the gate all the way and let it go. You want a sharp, immediate smack against the nose. A dull click means spring fatigue or grit in the hinge. Cycle (30

Carabiner markings show three strength ratings in kilonewtons (major axis, minor axis, open gate), a certification standard (EN 12275 for climbing, EN 362 for PPE), a letter code identifying intended use (B, K, H, X, A, Q, T), the CE mark with a 4-digit notified body number, and a batch or date code for traceability. The Four Pieces of Information Every Legitimate Carabiner Shows Every certified carabiner is its own spec sheet. Manufacturers stamp or laser-etch the data directly onto the spine so you can still read it two years after the packaging has gone in the trash. A legitimate carabiner from a recognized manufacturer (Petzl, Black Diamond, DMM, and a handful of others) will show four specific data clusters. The strength ratings: three numbers followed by “kN” with directional arrows next to each. The certification standard, usually an alphanumeric code starting with “EN” or “ANSI”. A single letter inside a circle, which tells you the design type. And a traceability code, often a long alphanumeric string, that pins down the manufacturing batch and year. If any of those four is missing on a carabiner you’re planning to tie yourself to, it’s either not meant for life-safety work or it’s

TL;DR: Carabiner weight capacity runs from under 100 lbs (unrated keychain stuff) to over 10,000 lbs (steel rigging). Climbing carabiners are rated in kilonewtons (kN) for major-axis breaking strength, typically 20–30 kN (4,500–6,750 lbs). Industrial carabiners use Working Load Limit (WLL), which is exactly 1/5 the breaking strength. Reading a Carabiner Rating: The Three Numbers That Actually Matter Life-safety carabiners have three numbers stamped on the spine. CE EN 12275 requires manufacturers to display these ratings in kilonewtons alongside standardized pictograms. They represent the Minimum Breaking Strength (MBS) in three loading scenarios. Rating Symbol Meaning Typical Value (Climbing) ↕ (Up/Down Arrows) Major Axis: Strength when pulled end-to-end along the spine. 20 kN to 30 kN ↔ (Left/Right Arrows) Minor Axis: Strength when cross-loaded across the gate and spine. 7 kN to 9 kN ⟷ (Open Gate Icon) Gate Open: Strength when the gate is unlatched or broken. 7 kN to 9 kN A carabiner hits its rated strength only when fully closed and loaded along the major axis. Deviate from that and the breaking strength drops 60% to 70%. kN, MBS, and WLL — Why the Same Carabiner Has Three “Weight Limits” One kilonewton equals roughly 224.8 pounds of force.

TL;DR: Cross-loading is when a carabiner gets loaded across its minor axis instead of along its spine. Strength drops from roughly 24 kN to around 7 kN. You fix it either by using a dedicated anti-rotation biner or by building a quick orientation check into your pre-catch routine. It matters most on lead, where dynamic forces peak. The Strength Drop Nobody Talks About in Numbers A belay carabiner rated 24 kN on its major axis typically holds only 7-8 kN on its minor axis. That’s roughly a two-thirds drop. The EN 12275 standard for HMS (pear-shaped) carabiners requires a minimum major-axis strength of 20 kN, a minor-axis strength of 7 kN, and a gate-open strength of 5 kN. Context: a typical sport lead fall puts somewhere around 3 to 5 kN on the top piece. By the time that force reaches the belayer’s harness, it’s been bled off through rope drag, friction at every quickdraw, and the belayer getting yanked a foot off the ground. Ballpark, you’re looking at 2 to 4 kN on the belay loop. 4 kN against a 7 kN minor-axis rating sounds fine on paper. It isn’t, really. Pin the gate open at the same moment

TL;DR kN stands for kilonewton, a unit of force equal to about 224 pounds (101.97 kg) at Earth’s gravity. On a carabiner, the kN numbers show minimum breaking strength in three loading conditions: major axis closed (usually 20-30 kN), minor axis (7-10 kN), and gate open (7-10 kN). The Kilonewton, Decoded (Without the Physics Lecture) A kilonewton is a unit of force. One kN equals 224.809 pounds-force (101.97 kgf) under standard Earth gravity. Manufacturers stamp this number on climbing and rigging hardware to indicate Minimum Breaking Strength, or MBS. The common error, and I see it from new climbers constantly, is treating a kilonewton as a static weight limit. It isn’t. Force accounts for both mass and acceleration. A 200-pound person hanging motionless on a rope applies about 0.89 kN. That same 200-pound person falling six feet before the rope catches generates vastly more force than that. The kN rating tells you the threshold where the aluminum or steel frame deforms and snaps. Here’s the static conversion table. These are breaking points, not safe working loads. Do not design around them. kN Rating Pounds-Force (lbf) Kilograms-Force (kgf) Common Application 7 kN 1,573 lbs 713 kg Typical gate-open breaking strength 10