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MS21209C0420L

Military Standard Screw Thread Insert

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Description

Length: 0.224", thread: 4-40, stainless steel, helicoil insert, coarse thread, dry film lube, MS21209 series insert

Specifications

Insert Size 0.159 in. max free outside diameter 0.144 in. min
Length 0.224
Special Features Mil-l-8937 coated with dry film lubricant
Style Designator Coil
Thread Class 3b
Thread Qty Per Inch (tpi) 40
Thread Series Designator Unc (coarse thread)
Thread Size 0.112

Cross-reference

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Catalog data updated 2026-07-05. Report a data error