APM Hexseal · Electronic Components
R4-40X1
SCREW PHILLIPS PAN 4-40X1
Part NumberR4-40X1
ManufacturerAPM Hexseal
AvailabilityAvailable to order — request a quote
Specifications
NSN5305-00-903-8292 (NSN)
Federal Item NameSCREW,MACHINE
Special FeaturesFURNISHED WITH ONE SILICONE RUBBER O RING
Nominal Thread Diameter0.112 INCHES
Thread Quantity Per Inch40
Screw MaterialSTEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
Screw Surface TreatmentPASSIVATE
Screw Surface Treatment Document AQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
Head Height0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM
Thread Class2A
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Length0.919 INCHES MINIMUM AND 1.000 INCHES MAXIMUM
Federal Supply Class5305 — Screws
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 R4-40X1 available?
We can source R4-40X1 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 R4-40X1 by APM Hexseal obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If R4-40X1 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 R4-40X1?
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 R4-40X1?
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.