Product Overview
Stainless-Steel Safety Screw-Lock Nut Carabiner Hook – Model ZB6213 Series
RICHWITS ZB6213 gives you a tool-free, double-security carabiner that locks when you twist—no accidental open, no lost pins.
Precision-investment-cast from marine-grade 304 stainless steel (316 on request), then mirror-polished and passivated for lifetime immunity to salt-spray, rain and urban humidity.
Screw-lock sleeve covers the gate: hand-tighten ½ turn for locked mode, back-off for instant access.
Eleven sizes (4 mm – 14 mm rod) deliver working-load limits from 40 kgf to 450 kgf—perfect for anchor rodes, stage rigging, hammock suspension or heavy-duty key rings.
Key Features & Benefits
304/316 SS One-Piece Casting – zero welds, zero rust; 316 on request for continuous immersion.
Screw-Lock Safety Sleeve – hand-tighten ½ turn for locked mode; back-off for instant access—no tools.
Mirror-Polished & Passivated – salt rinses off; no pitting or tea staining.
Large Gate Opening – gate = rod Ø + 4 mm; accepts chain, webbing or harness.
Silent Operation – stainless sleeve; no jingle, no accidental unlock.
Size for Every Load – from 9 g mini-lock (4 mm) to 515 g mega-lock (14 mm).
Cost-Effective 304 Std – 20 % cheaper than 316 while still marine-ready.
Usage Scenarios
Anchor Bridle & Mooring Chain – 12–14 mm rated 300–450 kgf; screw-lock prevents roll-out.
Hammock / Swing Suspension – 8–10 mm rated 125–200 kgf; locked mode for overnight safety.
Stage & Aerial Rigging – 10–12 mm rated 200–300 kgf; certified for aerial silks.
Heavy-Duty Key Rings – 5–6 mm rated 50–70 kgf; 18 g weight is pocket-friendly.
Certifications / Testing
Why Choose RICHWITS
Factory-Direct – wholesale & retail welcomed, 25 % cost saving vs. forged steel equal.
In-Stock – 400 000 pcs ready, MOQ 100 pcs, 48 h dispatch.
Fast Logistics – FedEx/UPS/DHL global 3-7 day delivery.
OEM/ODM – custom 316 material, logo or coloured sleeve within 2 weeks.
Test Certificates – mill cert, salt-spray, proof-load report supplied free.
FAQ
Q1: Will 304 SS really never rust?
A1: 304 resists most salt-air; choose 316 for continuous immersion—polish yearly to keep the shine.
Q2: What safe working load (SWL)?
A2: From 40 kgf (4 mm) to 450 kgf (14 mm); divide total load by number of locks—safety factor 4:1.
Q3: Can I use the 5 mm for a key-ring?
A3: Yes—9 mm gate clears standard split-rings; 18 g weight is pocket-invisible.
Q4: Will the sleeve unscrew under vibration?
A4: No—standard hand-torque plus ¼ turn stays tight; tested 24 h vibration 50–500 Hz, zero unlock.
Q5: Are spare 316 versions available?
A5: Yes—316 upgrade on request, MOQ 500 pcs, 20 % price adder.
Q6: Do you offer test certificates?
A6: Mill certificate for 304/316 SS, salt-spray report, and proof-load certificate supplied free on request.
Packing & Delivery
Exhibition
