MIL-SPEC · Electronic Components
AN4C6A
BOLT HEX HEAD UNDRILLED 1/4-28
Part NumberAN4C6A
ManufacturerMIL-SPEC
AvailabilityIn stock — ships fast
Specifications
NSN5306-00-156-2338 (NSN)
Federal Item NameBOLT,MACHINE
MaterialSTEEL CORROSION RESISTING OVERALL
Features ProvidedFINISHED HEAD
Thread Class3A
Thread Quantity Per Inch28
Material Document And ClassificatiQQ-S-770 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Grip Length0.312 INCHES NOMINAL
Thread Series DesignatorUNF
Head Height0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM
Thread Length0.469 INCHES MINIMUM
Width Between Flats0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM
Federal Supply Class5306 — Bolts
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 AN4C6A in stock?
Yes — AN4C6A is in our stock database. Request a quote for current pricing and lead time.
Is AN4C6A by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If AN4C6A 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 AN4C6A?
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 AN4C6A?
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.