The Washer,flat, cataloged under National Stock Number 5310-00-212-0091, 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7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-212-0091
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Overall Diameter
1.000 INCHES NOMINAL IN
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
LEATHER OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.656 INCHES NOMINAL IN
Thickness
0.125 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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5310-00-470-6154S285POSSIBLE MATCH
NUT,PLAIN,HEXAGON
Possible match (shared part number)Cummins Inc.
5905-00-535-4471247ASC1471-001POSSIBLE MATCH
RESISTOR SET,MATCHED
Possible match (shared part number)Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
6250-01-014-1594POSSIBLE MATCH
BALLAST,LAMP
Possible match (shared part number)
6680-01-122-7939S285POSSIBLE MATCH
INDICATOR,LIQUID QUANTITY
Possible match (shared part number)Eaton Aerospace Llc Div Fluid and Electrical Distribution Division
3460-01-353-8110S-285POSSIBLE MATCH
SLEEVE,EXPANSION MANDREL
Possible match (shared part number)Sunnen Products Co
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
S285
3/2Design control — primary reference
U.S. Government activity
Related Parts
5310-00-470-6154POSSIBLE MATCH
NUT,PLAIN,HEXAGON
S285
5905-00-535-4471POSSIBLE MATCH
RESISTOR SET,MATCHED
247ASC1471-001
6250-01-014-1594POSSIBLE MATCH
BALLAST,LAMP
6680-01-122-7939POSSIBLE MATCH
INDICATOR,LIQUID QUANTITY
S285
3460-01-353-8110POSSIBLE MATCH
SLEEVE,EXPANSION MANDREL
S-285
Frequently Asked Questions
What is NSN 5310-00-212-0091?
NSN 5310-00-212-0091 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-212-0091?
5 possible matches (shared part number, not a government interchangeability claim): 5310-00-470-6154, 5905-00-535-4471, 6250-01-014-1594. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-212-0091?
Key specifications for 5310-00-212-0091: Overall Diameter: 1.000 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: LEATHER OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-212-0091 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.