The Washer,flat, cataloged under National Stock Number 5310-00-285-4258, 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7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-285-4258
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Overall Diameter
0.437 INCHES NOMINAL IN
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
CELLULOSE OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.1495 INCHES NOMINAL IN
Thickness
0.062 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.
5330-01-079-474632-577POSSIBLE MATCH
GASKET
Possible match (shared part number)Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc
5999-01-095-6843POSSIBLE MATCH
CONTACT ASSEMBLY,ELECTRICAL
Possible match (shared part number)
5330-01-243-5839POSSIBLE MATCH
GASKET
Possible match (shared part number)
5360-01-245-392799132577POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
Possible match (shared part number)Alfa Laval Inc
5330-01-566-781132 57 7POSSIBLE MATCH
PACKING ASSEMBLY
Possible match (shared part number)Palfinger Marine Usa, Llc
5340-01-601-4666POSSIBLE MATCH
LATCH PLATE,STABILI
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
32-577
3/9Design control — primary reference
U.S. Government activity
Related Parts
5330-01-079-4746POSSIBLE MATCH
GASKET
32-577
5999-01-095-6843POSSIBLE MATCH
CONTACT ASSEMBLY,ELECTRICAL
5330-01-243-5839POSSIBLE MATCH
GASKET
5360-01-245-3927POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
99132577
5330-01-566-7811POSSIBLE MATCH
PACKING ASSEMBLY
32 57 7
5340-01-601-4666POSSIBLE MATCH
LATCH PLATE,STABILI
Frequently Asked Questions
What is NSN 5310-00-285-4258?
NSN 5310-00-285-4258 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-285-4258?
6 possible matches (shared part number, not a government interchangeability claim): 5330-01-079-4746, 5999-01-095-6843, 5330-01-243-5839. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-285-4258?
Key specifications for 5310-00-285-4258: Overall Diameter: 0.437 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: CELLULOSE OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-285-4258 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.