Safety Direct MK1011112 Flame Guard AP Harness | Canada

Safety Direct MK1011112 Flame Guard and Arc Breaker positioning harness. A vest-style positioning harness with a dorsal (back) D-ring and side D-rings, in two hot-work builds: the Flame Guard welder's harness with 100% Kevlar webbing, and the Arc Breaker Arc Safe harness with dielectric D-rings. Choose pass-through, quick-connect or tongue-buckle legs with QC chest, or the sternal-loop climbing version, in sizes XS to 3XL plus Universal.

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Compliance in Canada: CSA Z259.10-18 (Flame Guard MK1011112)Safety Direct states the MK1011112 Flame Guard Type AP harness is certified to CSA Z259.10-18 (and meets ANSI/ASSE Z359.11-2021 and OSHA 1910.140). Its 2026 catalogue lists the MK1011112, Q and GQ as Class AP welder positioning, the SL sternal-loop version as Class ADLP and the Arc Breaker D / DQ versions as Class AP Arc Safe. The SL and Arc Breaker versions are not on the maker page, so check their label for the CSA mark and arc rating. Inspect before each use.

Equipment type

Positioning harness

Standard

CSA Z259.10-18

Class

AP (SL: ADLP)

Builds

Flame Guard / Arc Breaker

Safety Direct MK1011112 Flame Guard harness key features

Flame Guard: 100% Kevlar webbing and thread, fire resistant, char resistant, self-extinguishing and cut resistant
Arc Breaker: Arc Safe build with dielectric dorsal and side D-rings
Dorsal D-ring for fall arrest; side D-rings for work positioning
Pass-through, quick-connect (QC) or tongue-buckle legs with QC chest
SL version adds sternal loops for climbing (Class ADLP per catalogue)
5 points of adjustment, built-in lanyard keeper, impact indicator, protected labels

Safety Direct MK1011112 positioning harness specifications

Manufacturer	Safety Direct Ltd., Sherwood Park, Alberta
Model	MK1011112 Flame Guard / Arc Breaker (48 SKUs)
Standard	CSA Z259.10-18 (per Safety Direct, MK1011112 Flame Guard)
Class	AP welder positioning; SL Class ADLP; D / DQ Class AP Arc Safe (per catalogue)
D-rings	Dorsal and side; dielectric on Arc Breaker; sternal loops on SL
Webbing	Flame Guard: 100% Kevlar webbing and Kevlar thread
Versions	MK1011112 pass-through; GQ tongue-buckle legs, QC chest; Q QC buckles; SL sternal loops; D Arc Breaker pass-through; DQ Arc Breaker QC
Capacity by size	XS 80-110 lb, S 110-150 lb, M 120-190 lb, L 130-270 lb, XL 170-325 lb, 2XL 210-370 lb, 3XL 230-420 lb, U 115-250 lb (SL sternal-loop version: 310 lb S-3XL/U, XS 80-110 lb, per catalogue)
Sizes	XS, S, M, L, XL, 2XL, 3XL, U (Universal)

Where the MK1011112 Flame Guard positioning harness fits

Welding at height

Kevlar webbing for sparks and hot work.

Rebar and steel

Side D-rings for hands-free positioning.

Electrical utilities

Arc Breaker with dielectric D-rings.

Plant shutdowns

One FR harness for hot work and positioning.

Canadian store

Sold by Fall Protection Canada, Paris, Ontario. CAD pricing, no duties, no border surprises, Canada-wide shipping.

MK1011112 Flame Guard harness questions and CSA status

Is the Safety Direct MK1011112 CSA certified?

Yes for the Flame Guard: Safety Direct states the MK1011112 Type AP harness is certified to CSA Z259.10-18. The SL sternal-loop and Arc Breaker D / DQ versions are listed by class in the catalogue but are not on the maker page, so check their label.

What worker weight does the MK1011112 fit?

It depends on size: XS 80-110 lb, S 110-150 lb, M 120-190 lb, L 130-270 lb, XL 170-325 lb, 2XL 210-370 lb, 3XL 230-420 lb, U 115-250 lb (SL sternal-loop version: 310 lb S-3XL/U, XS 80-110 lb, per catalogue).

What is the difference between Flame Guard and Arc Breaker?

Flame Guard is a Kevlar welder's harness for sparks and hot work. Arc Breaker is the Arc Safe build with dielectric D-rings for arc flash hazards.

What do the GQ, Q, SL, D and DQ codes mean?

GQ is tongue-buckle legs with QC chest, Q is quick-connect buckles, SL adds sternal loops, D is Arc Breaker dielectric with pass-through buckles and DQ is Arc Breaker with QC buckles.