The Washer,flat, cataloged under National Stock Number 5310-00-063-3240, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-00-063-3240
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Overall Diameter
0.628 INCHES NOMINAL IN
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
RUBBER NATURAL OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.250 INCHES NOMINAL IN
Thickness
0.126 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5910-00-160-3837C101-1POSSIBLE MATCH
CAPACITOR,FIXED,PLASTIC DIELECTR
Possible match (shared part number)Cae Usa Inc.
5998-00-226-2069C1011POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
Possible match (shared part number)Canberra Industries Inc.
2910-00-383-9353C101-1POSSIBLE MATCH
SHUTTER ASSEMBLY,AIR
Possible match (shared part number)Zenith Fuel Systems Llc
5330-00-540-3413C1011POSSIBLE MATCH
GASKET
Possible match (shared part number)Standex Intl Corp Dba General Slicing Red Goat Disposers
6685-00-551-2193C101-1POSSIBLE MATCH
THERMOMETER,SELF-INDICATING
Possible match (shared part number)National Weather Service Dba National Weather Service Ohd1 Div Office of Operational Systems
5307-01-560-1353C1011POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)The Gorman-Rupp Company Div Gorman-Rupp
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
C-10/11
3/9Design control — primary reference
Symmons Industries Inc
C10
5/9Secondary reference
Symmons Industries Inc
Related Parts
5910-00-160-3837POSSIBLE MATCH
CAPACITOR,FIXED,PLASTIC DIELECTR
C101-1
5998-00-226-2069POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
C1011
2910-00-383-9353POSSIBLE MATCH
SHUTTER ASSEMBLY,AIR
C101-1
5330-00-540-3413POSSIBLE MATCH
GASKET
C1011
6685-00-551-2193POSSIBLE MATCH
THERMOMETER,SELF-INDICATING
C101-1
5307-01-560-1353POSSIBLE MATCH
STUD,PLAIN
C1011
Frequently Asked Questions
What is NSN 5310-00-063-3240?
NSN 5310-00-063-3240 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-063-3240?
6 possible matches (shared part number, not a government interchangeability claim): 5910-00-160-3837, 5998-00-226-2069, 2910-00-383-9353. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-063-3240?
Key specifications for 5310-00-063-3240: Overall Diameter: 0.628 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: RUBBER NATURAL OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-063-3240 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.