National Semiconductor · Electronic Components
U312
BEARING,BALL,ANNULAR — NSN 3110-00-156-5019
Part NumberU312
ManufacturerNational Semiconductor
AvailabilityAvailable to order — request a quote
Specifications
NSN3110-00-156-5019 (NSN)
Federal Item NameBEARING,BALL,ANNULAR
MaterialSTEEL OVERALL
Overall Width12.0 MILLIMETERS NOMINAL
Overall Outside Diameter37.00 MILLIMETERS NOMINAL
Retainer Fabrication MethodPRESSED
Load DirectionANGULAR
Self Alignment LocationINTERNAL
Nondefinitive Spec Std Data123 TYPE AND 00 GRADE
Standard Tolerance DesignationABEC NO.1
Internal Fit Up DesignationSTANDARD
Bore ShapeSTRAIGHT
Federal Supply Class3110 — Bearings, Antifriction, Unmounted
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 U312 available?
We can source U312 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 U312 by National Semiconductor obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If U312 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 U312?
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 U312?
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.