Northrop Grumman Systems · Electronic Components
81686-1
Retainer, Electron Tube
Part Number81686-1
ManufacturerNorthrop Grumman Systems
AvailabilityAvailable to order — request a quote
Specifications
NSN5960-00-020-5196 (NSN)
Federal Item NameRETAINER,ELECTRON TUBE
Federal Supply Class5960 — Electron Tubes
Material Document And ClassificatiQQ-A-327 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE
Overall Width0.620 INCHES NOMINAL
Style DesignatorFLAT STRAP FOOTED HOLE MOUNTING
Thread Class2B SINGLE MOUNTING FACILITY
Overall Length4.560 INCHES NOMINAL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Surface Treatment Document And ClaMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE
MaterialALUMINUM ALLOY 6061 AND STEEL COMP 303
Mounting Facility Type And Quantit1 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Nominal Thread Size8.000 INCHES SINGLE MOUNTING FACILITY
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is 81686-1 available?
We can source 81686-1 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is 81686-1 by Northrop Grumman Systems obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 81686-1 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like 81686-1?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for 81686-1?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.