NSN 4730-00-057-3120 Repair Services

Boss Reducer Overhaul, Repair, and Maintenance

MPN: S6135-22077-1, S6135-22077-001

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4730-00-057-3120 boss reducer
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NSN 4730000573120


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AS9120B:2015 ISO 9001 Audited and Certified

FAA and EASA Part 145 Certified Repair Stations Ensuring the highest standards of quality and compliance for our clients' needs.

We specialize in the repair and refurbishment of nsn components. From mechanical assemblies to rotor blades, our comprehensive capabilities cover a wide range of NSN parts, providing cost effective solutions to extend the operational life of vital equipment.

NSN 4730-00-057-3120 has been designated as a repairable item and has been included in our capabilities catalog. If you require overhaul or repair services use the form on this page to send us your information. We will provide you with a lead time and price quote.

Repairability and Datasheet

NSN 4730-00-057-3120 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4730-00-057-3120
Categorization Aluminum tube or pipe fittings (couplings,elbows sleeves)
Repairability Code

Approximate Weight 0.1lb
Thread Class 3b 1st end
Reducer Type Concentric
Connection Style Gasket seal (boss) 1st end
Connection Type Threaded internal boss 1st end
Thread Size 0.750 inches 2nd end
Nominallength 1.148 inches
Material Aluminum alloy 2024
Material Specification Qq-a-225/6, t6 federal specification single material response
Surface Treatment Anodize outside
Surface Treatment Specification Mil-a-8625, type 2 military specification single treatment response outside
Thread Series Designator Unf 2nd end

Part Numbers

Part Number Company RNAAC (Repair Depot)
S6135-22077-1 SIKORSKY AIRCRAFT CORPORATION KE - NAVAL ICP
S6135-22077-001 SIKORSKY AIRCRAFT CORPORATION ZZ - USA