What are the standard bolts for steel buildings?

Grade 2, JS 1000 Hour Salt Spray Tested Bolts are standard.

What are the benefits of Pre-recessed Polyethylene Sealing Washers (LPDE)?

Pre-recessed Polyethylene Sealing Washers (LPDE) are made from industrial grade plastic and tolerant of extreme hot and cold temperatures.

Metal Bolts For Steel Quonset Building Kits

Q: Will the bolts for my steel building be airtight?

It depends on the bolt. Bolts that feature a recessed groove in the cap for the polyethylene washer form a virtually airtight seal.

Every SteelMaster building is constructed using one size nut and bolt. The SteelMaster bolts feature a recessed groove in the cap for the polyethylene washer to form a virtually airtight seal. SteelMaster bolts set the standard for quality and ease of construction, and offer unsurpassed strength and flexibility.

Features:

Grade 2, JS 1000 Hour Salt Spray Tested Bolts are standard.
Grade 8/1500 Hour and Grade 5/Stainless bolts are available.
Hex, Serrated, Self-locking Nuts standard.
Pre-recessed Polyethylene Sealing Washers (LPDE). Industrial grade plastic, tolerant of extreme hot and cold temperatures.
All hardware is pre-assembled by the manufacturer.

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Interior of insullated Quonset hut building

Metal Bolts For Steel Quonset Building Kits

Features:

Insulation

Vents

Base Connector

Skylights

Doors

Endwalls

Window Frames

Bolts

Arches

Engineered Blueprints