TB-H4S-40-TMK-2 – TRADESMAN KNIFE + SHEATH
ToughBuilt tradesman knife with sheath. 4-inch titanium-coated blade, full metal tang. All-purpose fixed-blade knife for HVAC and construction work.
Walk in. We test every part free at the counter. Open to homeowners, contractors, and multifamily — no account or minimum order.
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Ten departments, organized the way our counter is. Every category is on the shelf today.
Bring your old part. We'll diagnose it, find the replacement, and bench-test the new one at the counter before you leave — so you only make one trip.

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ToughBuilt tradesman knife with sheath. 4-inch titanium-coated blade, full metal tang. All-purpose fixed-blade knife for HVAC and construction work.

Rheem 42-101233-81 furnace pressure switch, -0.35″ WC. OEM for Rheem/Ruud RGPJ series furnaces. Also replaces 42-24194-01 and 42-24194-01K.

24″ x 24″ perforated drop ceiling grille with R6 insulated backpan. 51% open area. Adjustable 4-way airflow. Lays into standard T-bar grid.

Rheem RCFZ3717STANMC evaporator coil, 3-ton, R-410A, 17″ cabinet width. Cased coil for upflow/downflow applications. SEER2 compliant.

Midwest MWT-6510S offset straight-cut aviation snip. GlideTech forged blades with KUSH’N-POWER grips. Professional-grade for straight ductwork cuts.

Hilmor service hex key adapter for 3/16″ and 5/16″ hex valves. Makes opening liquid and suction service valves quick and easy without fumbling for Allen keys.

STCR5019 1/2″ staples, 1,000-pack. Heavy-duty staples for insulation, duct wrap, and upholstery. Fits Arrow T50 and compatible staplers.

PF20204 pleated air filter. MERV 11, high-capacity 20″ x 20″ x 4″. Fits standard residential HVAC systems. Replace every 6-12 months for best airflow and filtration.

3/4″ Schedule 40 PVC tee (slip x slip x slip). Creates a 90° branch connection in HVAC drain lines. Commonly used for cleanout access or splitting a drain run.
![MSHXLC - DUAL CHUCK (LONG [6], 1/4-5/16)](https://otp-hvac.com/wp-content/uploads/2024/11/MSHXLC_HEX_DRIVER-300x300.jpg)
Malco MSHXLC long-reach (6″) dual magnetic hex chuck driver. Reversible 1/4″ and 5/16″. Extra length reaches screws recessed in duct flanges and panels.