Description:

A Square Nut is a four-sided nut. Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). They are also much less likely to become rounded-off after repeated loosening/tightening cycles.

Material:

• Steel
• Stainless Steel
• Brass
• Etc.

Grades:

• Low Carbon Steel
• Grade 5 (medium strength)
• Grade 8 (hardened)
• 18-8 Stainless

Markings:

• Grade 2 – No markings
• Grade 5 – One Dot and one Dash, spaced apart
• Grade 8 – One dot and one Dash, spaced close together
• 18-8 Stainless Steel – vendor markings

Plating:

• No Plating/Plain (Plain Steel)
• Zinc (Blue or Yellow)
• Others

How to measure:

Thread size, Across flats (ACF), Thickness

Application

A Square Nut is used to secure bolts and other threaded fasteners in place.

Abbreviation/ Jargon:

Stove Nut

Part number prefix:

• 0SN*(Steel)
• 1SN*(Stainless Steel)
• 2SN*(Brass)
• Others

Style/ Types:

Heavy