SEMS Screws

SEMS Screws — Small OD Washer

SEMS screws with small outer diameter (OD) washers are specialized captive fasteners designed for high-density assemblies with restrictive spatial clearances. The reduced footprint of the captive washer prevents mechanical interference with adjacent micro-components while maintaining the assembly efficiency and vibration resistance of a standard SEMS fastener. They are essential for PCB mounting, medical instrumentation, and compact battery packs where precise torque application and spatial economy are demanded.

Small OD WasherSmall Diameter WasherCaptive WasherSEMS ScrewsCompact AssemblyFOD PreventionSpace-Constrained FasteningPCB Assembly

Specifications

Standards

ASTM F788ASTM F788MASTM A967DIN 6900

Materials

Carbon SteelAlloy SteelStainless Steel (A2)Stainless Steel (A4)

Grades

4.65.68.810.912.9

Washer Types

Small OD Plain WasherSmall OD Spring WasherSmall OD Flat washer

Drive Types

PhillipsHex SocketHexalobular (Torx)

Finishes

Zinc PlatedBlack OxidePassivated

Thread Types

Metric CoarseUNCUNF

SEMS Screws — Small OD Washer — Full Specifications

Our sems screws — small od washer are available in a range of sizes, materials, and standards. Contact us for a detailed specifications sheet and competitive bulk pricing.

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