The Washer,flat, cataloged under National Stock Number 5310-00-640-9456, 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7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-640-9456
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Overall Diameter
1.062 INCHES NOMINAL IN
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
PLASTIC OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.765 INCHES NOMINAL IN
Thickness
0.046 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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5365-01-342-732684172-2POSSIBLE MATCH
SHIM
Possible match (shared part number)Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
5307-01-421-1935841-00422-000POSSIBLE MATCH
STUD,CONTINUOUS THREAD
Possible match (shared part number)Aqua-Chem, Inc. Dba Aqua-Chem Inc
6530-01-423-2849BP6-4APOSSIBLE MATCH
BASKET,STERILIZATION,SURGICAL IN
Possible match (shared part number)Becton, Dickinson and Co Dba Becton Dickinson & Co
6750-01-427-6756POSSIBLE MATCH
FILM,PHOTOGRAPHIC
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
841722
3/2Design control — primary reference
U.S. Government activity
Related Parts
5365-01-342-7326POSSIBLE MATCH
SHIM
84172-2
5307-01-421-1935POSSIBLE MATCH
STUD,CONTINUOUS THREAD
841-00422-000
6530-01-423-2849POSSIBLE MATCH
BASKET,STERILIZATION,SURGICAL IN
BP6-4A
6750-01-427-6756POSSIBLE MATCH
FILM,PHOTOGRAPHIC
Frequently Asked Questions
What is NSN 5310-00-640-9456?
NSN 5310-00-640-9456 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-640-9456?
4 possible matches (shared part number, not a government interchangeability claim): 5365-01-342-7326, 5307-01-421-1935, 6530-01-423-2849. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-640-9456?
Key specifications for 5310-00-640-9456: Overall Diameter: 1.062 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: PLASTIC OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-640-9456 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.