MIL-SPEC · Electronic Components
MS21083C4
NUT SELF LOCKING 1/4
Part NumberMS21083C4
ManufacturerMIL-SPEC
AvailabilityIn stock — ships fast
Specifications
NSN5310-00-897-6145 (NSN)
Federal Item NameNUT,SELF-LOCKING,HEXAGON
MaterialSTEEL CORROSION RESISTING OVERALL EXCEPT INSERT; PLASTIC POLYAMIDE NYLON LOCKING INSERT
Special FeaturesWEAPON SYSTEM ESSENTIAL
Nominal Thread Size0.250 INCHES
Locking FeaturePREVAILING TORQUE WITH NONMETALLIC INSERT
Nut StyleHEXAGON
Bearing Surface TypeCHAMFERED OR WASHER FACED
Surface TreatmentPASSIVATE OVERALL EXCEPT INSERT
Bearing Surface Finish125.0 MICROINCHES
Countersink Angle88.0 DEGREES NOMINAL NUT
Thread Quantity Per Inch28
Federal Supply Class5310 — Nuts And Washers
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 MS21083C4 in stock?
Yes — MS21083C4 is in our stock database. Request a quote for current pricing and lead time.
Is MS21083C4 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MS21083C4 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 MS21083C4?
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 MS21083C4?
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.