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JOHNSON LEVEL 12 in Aluminum Rafter Square with 1/4 in Top Thickness - Rafter Squares
JOHNSON LEVELRafter Squares

JOHNSON LEVEL 12 in Aluminum Rafter Square with 1/4 in Top Thickness

The JOHNSON LEVEL Rafter Square is a 12-inch aluminum rafter square with a 1/2-inch center-to-edge heel width. It features etched markings in inch units, including a degree scale, with graduations of 1/8 inch and 1/4…

SKU 3G-OTH-307157

Also listed as: 19041200 · 1904 1200

Brand
JOHNSON LEVEL
Item
12 in Aluminum Rafter Square with 1/4 in Top Thickness
Part Number
1904-1200
Category
Rafter Squares
Available to Order
Also known as:1904-1200JOHNSON LEVEL
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
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Technical Specifications

JOHNSON LEVEL
Manufacturer Part Number
1904-1200
Type
1/4 in, Top, Aluminum
Square Size
12 in

Technical Documents

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JOHNSON LEVEL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The JOHNSON LEVEL Rafter Square is a 12-inch aluminum rafter square with a 1/2-inch center-to-edge heel width. It features etched markings in inch units, including a degree scale, with graduations of 1/8 inch and 1/4 inch. This product is identified by manufacturer part number 1904-1200.

Frequently Asked Questions

What is the JOHNSON LEVEL Rafter Square used for?

The JOHNSON LEVEL Rafter Square is used for marking and measuring angles in carpentry and construction, particularly for cutting rafters, stairs, and framing. Its 12-inch aluminum body with etched inch graduations and degree scale provides durable, accurate layout for roof pitches and common joinery.

What are the specifications of the JOHNSON LEVEL Rafter Square 1904-1200?

The JOHNSON LEVEL Rafter Square 1904-1200 has a 12-inch square size, 1/2-inch center-to-edge heel width, and is made of aluminum. Markings are etched in inch units with 1/8-inch and 1/4-inch graduations, plus a degree scale. The top edge is 1/4-inch thick.

Where to buy the JOHNSON LEVEL Rafter Square worldwide?

3G Electric supplies the JOHNSON LEVEL Rafter Square 1904-1200 to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this aluminum rafter square.

How to maintain the JOHNSON LEVEL Rafter Square?

To maintain the JOHNSON LEVEL Rafter Square, clean it after use with a dry cloth to remove debris and prevent corrosion. Store in a dry tool box or pouch to protect the etched markings. Avoid dropping or bending the aluminum body to preserve accuracy for layout work.

Used in

Common applications for JOHNSON LEVEL
Concrete formwork and foundation layout — Johnson Level 32X automatic optical level (40-6962) for elevation control and alignment.
Steel erection and plumbing — Johnson Level 9-inch magnetic torpedo level (1411-0900) with rare earth magnets and V-grooves for pipe and conduit.
Site grading and excavation — Johnson Level 16 ft fiberglass telescoping leveling rod (40-6316) with 1 ft/1 in graduations for grade checking.
Carpentry and stair layout — Johnson Level CS5 rafter square with octagon and inch graduations for marking rafters and stairs.
Electrical conduit and mechanical installation — Johnson Level magnetic torpedo level for level, plumb, 45°, and 30° measurements.
General construction layout — Johnson Level JRT300-GNHV-K rotary laser kit with green beam and 4,000 ft range for horizontal and vertical alignment.
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JOHNSON LEVEL Products

3G Electric supplies JOHNSON LEVEL rafter squares. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Aluminum framing square with clear anodized finish. Base measures 8 in x 1 in, tongue 12 in x 1 1/2 in. Features printed inch graduations in 1/16-inch increments. Used for layout, marking, and checking squareness in framing, roofing, and general construction
JOHNSON LEVEL
Aluminum framing square with clear anodized finish. Base measures 8 in x 1 in, tongue 12 in x 1 1/2 in. Features printed inch graduations in 1/16-inch increments. Used for layout, marking, and checking squareness in framing, roofing, and general construction
This framing square features a 24-inch base length and 16-inch by 24-inch overall dimensions, constructed from anodized aluminum. Etched graduations in inches and 1/10-inch increments support layout and measurement tasks for framing, rafter angles, and octagonal shapes in construction and industrial applications
JOHNSON LEVEL
This framing square features a 24-inch base length and 16-inch by 24-inch overall dimensions, constructed from anodized aluminum. Etched graduations in inches and 1/10-inch increments support layout and measurement tasks for framing, rafter angles, and octagonal shapes in construction and industrial applications
This drywall T-square has a 22-inch base and a 48-inch blade, constructed of clear anodized aluminum. It features inch graduations with 1/8-inch markings for SAE measurements. Used for layout and cutting tasks in drywall installation, it provides straight-line marking and squaring on drywall sheets
JOHNSON LEVEL
This drywall T-square has a 22-inch base and a 48-inch blade, constructed of clear anodized aluminum. It features inch graduations with 1/8-inch markings for SAE measurements. Used for layout and cutting tasks in drywall installation, it provides straight-line marking and squaring on drywall sheets

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