Stainless Steel Carbon Steel SEMS Combination Screws With Flat Spring Washers Multiple Head Custom Fasteners

Short Description:

Pre assembled sems screws with flat and spring washers Pan round hex head available multiple materials and plating for electronics appliance equipment assembly

Product Detail

Product Tags

Product Introduction

Our sems screw is preassembled combination fastener integrated with flat washer and spring washer avoiding missing washers during installation and greatly improving assembly efficiency. The whole set is fixed tightly and will not fall off when screwing. Various head options including pan head, button head and hex head can satisfy different installation space requirements.

We produce metric and partial inch specification sems screws, support customized thread diameter, length, surface treatment as your project demands. As a professional China fastener manufacturer, we accept small batch trial order and bulk wholesale.

Key Advantages

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Combined Anti-Loosening Design

One piece combined design — flat washer for pressure dispersion, spring washer for anti-loosening and shock resistance, double protection against loosening under vibration environment.

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Diversified Raw Material

SUS304 stainless steel with excellent rust resistance for humid application; carbon steel with zinc plating or black oxide for cost-effective general assembly.

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Precise Rolled Thread

Rolled thread with smooth tapping, tight matching, not easy to slip tooth during fastening.

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Multiple Head Shapes

Standard pan head, low profile button head, hex head for thin sheet fixing — suitable for various installation space requirements.

Available Surface Finish

Stainless Steel Natural Bright Finish Carbon Steel Blue White Zinc Yellow Zinc Black Oxide

Common Application

Widely used for electrical enclosures, household appliances, communication equipment, furniture, plastic and metal sheet assembling.

Specifications

Head Type

Pan Head / Button Head / Hex Head

Drive

Phillips Cross Recess

Material

304 Stainless Steel / Carbon Steel

Finish

Zinc Plated / Black Oxide / Natural

Size

Custom metric & inch sizes available

Product Details

Item	Parameter
Material	Steel, Alloy, Bronze, Iron, Carbon steel and other customized materials
Grade	4.8, 6.8, 8.8, 10.9, 12.9
Specification	M0.8-M16, 0#-1/2″, custom sizes per customer drawing
Standard	ISO, DIN, JIS, ANSI/ASME, BS
Lead Time	10-15 working days normally, depends on final order quantity
Certificate	ISO14001:2015, ISO9001:2015, IATF16949:2016
Color	Customized available as client’s requirement
Surface Treatment	Various customized surface finishes supported
MOQ	1000pcs for regular items; negotiable for out of stock products

Various Head & Drive Options

Rich optional head shapes and drive recess types are available for sems screws. Classic head options cover flat, oval, pan, round, truss, cheese, cylinder, hexagon and other customized profiles; diverse drive types including phillips, slotted, torx, hexagon, pozidriv, triangle and various anti-theft security slots can be produced as per drawings. Multiple head and slot combinations satisfy different assembling, fixing and anti-pry demands of electronics, home appliances and mechanical products.

YH FASTENER is a professional Chinese fastener manufacturer with abundant experience in standard and custom fastener production. We own full sets of production and testing machines and implement strict QC control in every working procedure. OEM & ODM customization based on drawings or samples is available, small trial orders are acceptable for quality testing. Benefiting from stable lead time and reasonable cost, our products have been widely exported to Europe, America, Southeast Asia and other global markets.