Heavy hex jam nuts have the same dimension across the flats as heavy hex nut, but are thinner.
Hex jam nuts have the same dimensions across face of a standard hex nut but are thinner. Hex jam nuts are typically used as leveling nut or tightened
Heavy Hex Jam Nuts
Machine Bolts - Portland Bolt
Rosette Washers - Portland Bolt
Bolt Depot - Heavy hex jam nuts, Brass, 1-1/4-7
Die Seams on Headed Bolts - Portland Bolt
90° Anchor Bolt - Portland Bolt
The Use of Two Nuts to Prevent Self Loosening of Fasteners
Ziegler Bolt & Nut House. 3-1/2-4 HEAVY HEX JAM NUT PLAIN
Rotational Capacity Tests - Portland Bolt
Nuts Selection Guide: Types, Features, Applications
Galvanized Nuts Tapped Oversize - Portland Bolt
Astm bolt-nuts
Square Nuts - Portland Bolt
Heavy Jam Nuts -
ASTM A325 Heavy Hex Bolts W/Nuts, Galvanized Us/Ca