Hunan Jia Shan Hardware Tech Co., Ltd.
admin@jshardwaretech.com
86-0731 -82919092
Product Details
Place of Origin: china
Brand Name: JIASHAN
Certification: ISO 9001
Payment & Shipping Terms
Minimum Order Quantity: 10pcs
Price: $0.01~2.56,Piece/Pieces
Packaging Details: Plastic Bag+Chipboard Carton+Plywood Pallet Pallet with Belt&Plastic Film.
Delivery Time: about 12-18days
Payment Terms: L/C,D/A,D/P,T/T
Supply Ability: 10000,Piece/Pieces,Month
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Product Name:
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SEMS SCREW
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Service:
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OEM
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Corrosion Resistance:
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Yes
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Port:
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Shenzhen, Guangzhou
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Corrosionresistance:
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High
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Thread Type:
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Standard/Customization
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Package:
|
Plastic Bag+Chipboard Carton+Plywood Pallet Pallet With Belt&Plastic Film.
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Finish:
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Customized
|
|
Product Name:
|
SEMS SCREW
|
|
Service:
|
OEM
|
|
Corrosion Resistance:
|
Yes
|
|
Port:
|
Shenzhen, Guangzhou
|
|
Corrosionresistance:
|
High
|
|
Thread Type:
|
Standard/Customization
|
|
Package:
|
Plastic Bag+Chipboard Carton+Plywood Pallet Pallet With Belt&Plastic Film.
|
|
Finish:
|
Customized
|
Product Description
This SEMS screw has a hex head with an additional cross recess (dual drive) and comes with a DIN9021 large diameter flat washer pre‑assembled. The large washer provides a much bigger bearing surface than standard washers, making it perfect for soft materials or thin sheet metal with oversized holes. The screw is made of A2 (304) or A4 (316) stainless steel, strength classes 70 or 80. “All sizes" means diameters from M3 up to M12 can be supplied. The dual drive (hex + cross) allows installation with a wrench or a screwdriver – a useful feature for maintenance.
| Industry | Usage |
|---|---|
| Automotive | High-strength applications in engines, heavy-duty machinery, and bridge construction |
| Mechanical | Connecting mechanical parts, circuit boards, engines, transmissions in various industries |
| Energy | Connecting power generation equipment and transmission lines |
| Architectural | Building structures, shipbuilding, and petrochemical equipment |
Plastic and composite enclosures: large washer prevents embedment and cracking.
Solar PV module frames: even load distribution on aluminium profiles.
Home appliances: washing machine bases, refrigerator back panels.
Curtain walls and aluminium composite panels: outdoor use with A4 stainless.
Display racks and retail fixtures: easy installation with common tools.
Extra‑large washer (DIN9021) – protects soft substrates (plastic, aluminium, wood).
Dual drive (hex + cross) – use a wrench for high torque or a screwdriver for speed.
All sizes coverage – one supplier for the whole range.
Stainless steel durability – A2 for inland, A4 for coastal/chemical environments.
DIN9021 standard – ensures consistent washer dimensions and fit.
