MIL-SPEC · Hardware > MIL-Spec Hardware
NAS620-4L
MIL/AN hardware: flat washer, reduced OD (NAS620), size 4L
Part NumberNAS620-4L
ManufacturerMIL-SPEC
AvailabilityIn stock — ships fast
Specifications
NSN5310-00-616-3648 (NSN)
Federal Item NameWASHER,FLAT
MaterialSTEEL OVERALL
Overall Diameter0.204 INCHES MINIMUM AND 0.224 INCHES MAXIMUM
Material Document And ClassificatiQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
Hole Diameter0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM
Peripheral Shape StyleROUND
Surface Treatment Document And ClaQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Cross Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Thickness0.016 INCHES NOMINAL
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 NAS620-4L in stock?
Yes — NAS620-4L is in our stock database. Request a quote for current pricing and lead time.
Is NAS620-4L by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If NAS620-4L 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 NAS620-4L?
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 NAS620-4L?
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.