🔍 Click to zoom
Miller Titan AirCore AC-QC-D Full Body Harness, L/XL (Side D-rings, 400 lb)
$119.99
Final price set by Amazon · may vary
EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Miller Titan AirCore AC-QC-D full body harness Editorial assessment by the WC Safety Editorial Team, based on published Honeywell Miller specifications and category f...
Check Price on Amazon🔒 Amazon Associate · You pay the same price · We earn a small commission
Zero Sponsored ListingsNo paid placements. Every recommendation is based on compliance, build quality, and field performance.
Curated SelectionExpert-chosen safety gear
Independently ReviewedUnbiased assessments — no manufacturer input
Built for Industrial BuyersSourced and reviewed for safety managers, procurement teams, and field supervisors.
EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Miller Titan AirCore AC-QC-D full body harness
Editorial assessment by the WC Safety Editorial Team, based on published Honeywell Miller specifications and category fit. We did not laboratory-test this product.
CHECK PRICE ON AMAZON →SHOP FULL BODY HARNESSES →
As an Amazon Associate, WC Safety earns from qualifying purchases. Full affiliate disclosure.
Miller Titan AirCore AC-QC-D Full Body Harness, L/XL (Side D-rings, 400 lb) Overview
The Miller Titan AirCore AC-QC-D full body harness is the wearable connecting point between a worker and a personal fall-arrest system. Under OSHA 1926.502 and 1910.140, fall arrest must use a full body harness — never a body belt — connected through a lanyard or self-retracting lifeline to a compliant anchorage; this Miller AirCore harness in Large/X-Large adds work-positioning capability on top of that fall-arrest role.
As a side D-ring harness, its layout is the draw: a finished carbon-steel back D-ring handles fall arrest while a pair of side D-rings support work positioning. It is a quick-connect buckle harness with quick-connect chest and leg buckles and a sub-pelvic strap, and it pairs patented DuraFlex stretchable polyester webbing with Miller's AirCore open-core padding harness technology that improves airflow and cuts heat buildup. Honeywell rates this 400 lb positioning harness to a 400 lb capacity.
Like any device in the fall protection category, this is a buyer-intent item to pair with the rest of a system. Match it with a compatible shock-absorbing lanyard or self-retracting lifeline and a rated anchor point, and confirm the exact ANSI class and size fit on Honeywell's datasheet. Connect fall-arrest hardware only to the dorsal D-ring; the side D-rings are for positioning with a positioning lanyard, never for arresting a fall. Any harness that has arrested a fall must be removed from service. Buyers cross-reference this full body harness against other sizes and D-ring configurations before ordering.
What This AirCore Harness Is Built For
| Use case | Fit | Buyer guidance |
|---|---|---|
| Fall arrest plus work positioning | Purpose-built | Back D-ring for arrest, side D-rings for hands-free positioning tasks. |
| Hot / long-shift environments | Strong | Open-core breathable padding improves airflow and reduces heat buildup. |
| Frequent donning and doffing | Strong | Quick-connect chest and leg buckles snap on and off fast. |
| Large/X-Large wearers | Sized | This part number is L/XL; order other sizes with the matching code. |
| Reuse after a fall event | Not suitable | OSHA requires any harness subjected to impact loading be removed from service. |
Fall protection is life-safety equipment. A personal fall arrest system must limit free fall and arrest forces under OSHA 1926.502 / 1910.140 and ANSI Z359: use a full-body harness (never a body belt for fall arrest) with a compatible self-retracting lifeline or shock-absorbing lanyard and an anchorage rated 5,000 lb per worker (or engineered to a 2:1 safety factor). Connect fall-arrest hardware to the dorsal D-ring only and reserve the side D-rings for positioning, size and adjust the harness so it sits snug with the back D-ring between the shoulder blades, inspect every component before each use, immediately retire anything that has arrested a fall or shows damage, and work to a documented rescue plan. Browse fall protection and full body harnesses.
Pros & Cons
Pros
- Carbon-steel back D-ring for arrest plus side D-rings for positioning
- Open-core breathable padding for airflow and cooler wear
- Quick-connect chest and leg buckles for fast donning
- Patented DuraFlex stretchable webbing and a sub-pelvic strap
- 400 lb rated capacity
Cons
- Harness only; the lanyard or SRL and anchorage are sold separately
- Side D-rings are for positioning — never for fall arrest
- Steel hardware is heavier than the aluminum-hardware AirCore version
- Confirm the ANSI class for your jobsite on Honeywell's datasheet
How It Compares
This L/XL AC-QC-D is the side-D-ring, steel-hardware AirCore. Weigh it against the alternatives before ordering:
| Model | D-rings | Hardware | Best for |
|---|---|---|---|
| AC-QC-D (this page) | Back + side | Steel, quick-connect | Fall arrest plus work positioning |
| AC-QC (back only) | Back only | Steel, quick-connect | Straight fall arrest, lower cost |
| AirCore aluminum hardware | Varies | Aluminum, quick-connect | Lighter weight for all-day wear |
Choose the AC-QC-D for back and side D-rings, the AC-QC for a back-D-ring-only build, or an aluminum-hardware AirCore for less weight. Whichever you pick, complete the system with a lanyard or self-retracting lifeline from the fall protection range.
Specifications
| Brand | Honeywell Miller (Titan AirCore) |
| Model / Part Number | AC-QC-D/UGN |
| Type | Full Body Harness (fall-arrest + positioning wearable) |
| Size | Large/X-Large (Green) |
| D-rings / Buckles | Carbon-steel back D-ring + side D-rings; quick-connect chest and leg buckles |
| Webbing / Padding | DuraFlex stretchable polyester; AirCore open-core breathable padding; sub-pelvic strap |
| Capacity / Standards | 400 lb; meets applicable OSHA & ANSI Z359 (confirm class per datasheet) |
Related Guides
best safety harness, fall protection equipment guide, best self-retracting lifelines, best fall protection kits, best fall protection lanyards.
Related Resources
fall protection full body harnesses self retracting lifelines anchor points
Frequently Asked Questions
What size is the Titan AirCore AC-QC-D/UGN?
This part number is Large/X-Large. Miller offers the AirCore in XS through 4XL by changing the size code in the model number. Confirm the L/XL range on Honeywell's datasheet against the wearer's measurements before ordering, since a correct fit is essential to fall-arrest performance.
What D-rings does the AC-QC-D have?
It has a finished carbon-steel back (dorsal) D-ring for fall arrest plus a pair of side D-rings for work positioning. Always connect a fall-arrest lanyard or SRL to the dorsal D-ring only. The side D-rings are used together with a positioning lanyard, never for fall arrest.
What are the side D-rings used for?
Side D-rings are used as a pair with a positioning device or lanyard so a worker can lean back into the harness and work hands-free, for tasks like rebar tying or on a pole. They are for positioning or restraint, not for arresting a fall, which must go to the back D-ring.
What buckles does the AirCore AC-QC-D use?
It uses quick-connect buckles on the chest and leg straps. Quick-connect buckles snap together and release with a dual-tab action for fast, repeatable donning, which suits workers who take the harness on and off frequently through the day.
What makes the AirCore padding different?
Miller's AirCore back padding uses open-core, breathable technology that improves airflow and reduces heat and moisture buildup against the back, keeping the wearer cooler and drier. Combined with the DuraFlex stretchable webbing, it targets all-day comfort.
What weight capacity is the AC-QC-D rated for?
Honeywell rates the AirCore AC-QC-D to a 400 lb capacity, including the worker plus tools and equipment. Confirm your combined weight falls within the rated capacity and match the rest of your fall-arrest system to the same range.
What standards does the harness meet?
The AirCore steel-hardware line is built to meet applicable OSHA 1926.502 and 1910.140 requirements and ANSI Z359 standards for full body harnesses. Because the exact class can vary by configuration, we do not publish a class we cannot verify for this part number. Confirm the certifications on Honeywell's datasheet.
Does the harness include a lanyard or SRL?
No. It is the full body harness only. OSHA requires a complete personal fall-arrest system, so you also need a compatible shock-absorbing lanyard or self-retracting lifeline and a rated anchorage. The harness is the wearable connecting point between the worker and that system.
Is the webbing the same as Miller DuraFlex?
Yes. The AirCore AC-QC-D uses patented Miller DuraFlex stretchable polyester webbing, which flexes with the worker to reduce bunching and binding. The AirCore difference is the open-core breathable back padding layered with that webbing for cooler wear.
Is a body belt an alternative to this harness?
No. OSHA 1926.502 and 1910.140 require a full body harness for fall arrest; body belts are prohibited for arresting a fall and are limited to positioning or restraint. The AirCore AC-QC-D is a full body harness suitable as the wearable component of a fall-arrest system.
When must the harness be removed from service?
Remove it immediately after it has been subjected to a fall or impact loading, or if inspection finds cut, frayed, or chemically damaged webbing, damaged D-rings or buckles, or missing labels. OSHA and ANSI require retiring any fall-arrest component that has arrested a fall.
How should I inspect the AC-QC-D before use?
Before each use, check the DuraFlex webbing for cuts, fraying, burns, or chemical damage; inspect the back and side D-rings and all quick-connect buckles for cracks, corrosion, or distortion; verify the stitching, padding, and labels are intact; and confirm the buckles latch securely. Remove it from service if any component fails inspection.
Written by Steven Eaton, WC Safety Editorial. Specifications sourced from Honeywell Miller published data. Compare the range in full body harnesses.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Match the product to your specific hazard and follow your site PPE program.
Brand / Vendor
Honeywell
Model / SKU
AC-QC-D/UGN
Product Type
Full Body Harnesses
Price
$119.99 (Amazon)
Availability
Check current availability on Amazon
No Paid Placements
Every product earns its place based on safety credentials and field performance, not advertising spend.
Industrial Grade Only
Products sourced for professional use in manufacturing, construction, and industrial environments.
Compliance Verified
Every product listed on WC Safety is reviewed for standards compliance and safety credentials before publication.
Sourced for Professionals
Gear selected for safety managers, procurement teams, and field supervisors — not casual consumers.
Verified Buyer Reviews
Customer Reviews
Share Your Experience
Write a Review
Thank you for your review!
Your submission has been received and will be published after verification.