AN919-1D - REDUCER, BOSS

NSN: 4730-00-187-3575, NIIN: 1873575
New Surplus, Sold Per Each

A Reducer, Boss is a threaded fitting used to connect two components with different thread sizes, allowing a larger port to adapt to a smaller one. Commonly used in hydraulic, pneumatic, and fluid systems, it ensures a secure, leak-tight connection while maintaining flow efficiency.

Specifications

Connection Style: Flared W/ Gasket Seal (Boss) All Ends
Connection Type: Threaded External Boss All Ends
Reducer Type: Concentric
Surface Treatment: Anodize
Material: Aluminum Alloy
Nominal Overall Length: 1.250"
Thread Class: 3A All Ends
Thread Series Designator: Unf All Ends
Thread Size: 0.312" Second End
Thread Size: 0.438" First End

Part Number Info

Part Number: AN919-1D
Unpunctuated: AN9191D
NSN: 4730-00-187-3575
NIIN: 1873575

Potential Alternates: 110-033-1, 273-0089-002, 7M637DA-1D, 10438950, AS4841, AS5174, AS5174D0402, 8071598

Replaces Cancelled NSN: 4730-00-901-8174, 4730-00-828-9974, 4730-00-820-3366

New Surplus: These parts are classified as new and unused, meaning they have not been installed or placed into service. However, they come without traceability or original manufacturer certifications, which might be required for certain high-level regulatory uses. Our company provides its own Certificate of Conformance (CoC) as a statement of assurance that the parts are in good working condition and have been sourced from reliable channels. These are ideal when the focus is on cost-effectiveness without compromising on quality.

Sold Per Each: This item is sold individually, with the price listed for a single unit. Perfect for purchasing the exact quantity needed without the requirement to buy in bulk. For larger quantities, consider reviewing any available bulk pricing options.

Alternate Part Numbers: Due to the nature of ever-evolving part numbering structure, multiple part numbers may meet the same specifications and performance standards. If only an alternate part number is available, we will contact you to confirm compatibility. We strongly recommend consulting the appropriate repair manuals to ensure accuracy before using an alternate part.

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