Anchor Bolts
Carriage Bolts
Elevator Bolts
Eye Bolts
Hanger Bolts
Heavy Hex Bolts
Hex Bolts
Hook Bolts
J Bolts
Lag Bolts
Plow Bolts
Rod End Bolts
Stadium Seat Bolts
Tap Bolts
U Bolts
Cap Nuts
Coupling Nuts
Flange-Serrated Nuts
Hex Machine Screw Nuts
Hex Nuts
Hex Slotted Nuts
Metal & Nylon Lock Nuts
Non-Serrated Flange Nuts
Thumb Nuts
Weld Nuts
Wing Nuts
Blind Rivets
Countersunk Rivets
Semi-Tubular Rivets
Solid Rivets
Structural Rivets
Button Socket Cap Screws
Concrete Screws
Deck Screws
Hex Cap Screws
Machine Screws
Self-Drilling Screws
Self-Tapping Screws
Sems Screws
Set Screws
Shoulder Socket Screws
Socket Cap Screws
Tapping Screws
Thread Cutting Screws
Thread Forming Screws
Thumb Screws
Weld Screws
Wood Screws
Beveled Washers
Flange Washers
Flat Washers
Hardened Washers
Plastic Washers
Shoulder Washers
Lock Washers
Special Washers
Spring Washers
Wave Washers
Dowel Pins
Spring Pins/Roll Pins
Sems screws are machine screws that can have one or more flat or lock washer under the head already assembled. China Aluminum Screws, Inc. is a full fastener supplier of many types of sems screws. We offer them in both stainless steel and steel zinc (also available in yellow and black zinc). Our sems line includes both metric and inch screws.
We offer the following sems screws off the shelf:
- Head style
- Pan
- Hex head
- Hex washer head
- Washer
- Internal
- External
- Conical
- Double sems (split lock washer and a flat washer)
We also offer them in 6 lobe drives besides the standard phillips and slotted drive. Besides the standard sems screws, we can also make your sems screw per your print. We can match your screw and washer per your exact needs.