Askew Head Bolts (427)

#425 Shelf Angle Wedge Insert

#427 Askew Head Bolts 

Inserts are embedded in concrete slabs to hold Shelf Angles or other devices using #427 Askew Head Bolts. The insert is nailed to the wood form through 3 holes. When the form is stripped, the nails are clipped from the outside allowing the #427 bolt to vertically adjust to the proper location. #442 or #443 shims can be used if necessary. The #425 Shelf Angle must be installed at least 1-1/2” from any edge on the concrete slab.

427 bolt with nut and washer

¾” diameter - Hotdip Galvanized After Fabrication 

Material Specifications 

Malleable Iron Specifications: ASTM A47B4 Ferratic Malleable Iron Castings Class/Grade 32510   

Min Tensile Strength - PSI 50,000   

Min. Yield Strength - psi  32,500   

Elongation in tension 10% Microstructure is Temper carbon and ferrite

For additional information on Specifications of Shelf Angle Inserts refer to the following: ASME B18.2.1-2010 - Askew Head Bolts - American National Standards Institute.