and the jaws open to a lock position when the screw is inserted

1/2-13 x 5 3/4 Hex Cap Screw SS 316 (A4)

5/8-18 x 3 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

3/4-10 x 7 1/2 Hex Cap Screw SS 316 (A4)

3/8-16 x 3 STRONG-BOLT® 2 Cracked and Uncracked Concrete Wedge Anchor 316 Stainless Steel(50)

1 1/4 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (12) 5/8-18 Socket Cap Screws Alloy and the jaws open to1 1 4 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (12) . L9 High Tension USS pattern flat washers are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods.