Outside Diameter: 1.147 INCHES MINIMUM AND 1.166 INCHES MAXIMUM IN
Material Thickness: 0.045 INCHES NOMINAL IN
Material: STEEL OVERALL
Hole Diameter: 0.704 INCHES MINIMUM AND 0.728 INCHES MAXIMUM IN
Identification
NSN: 5310-00-285-5666
NIIN: 002855666
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Washer,lock, cataloged under National Stock Number 5310-00-285-5666, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-285-5666
Item Name
Washer,lock
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Style Designator
FLAT INTERNAL TEETH
Outside Diameter
1.147 INCHES MINIMUM AND 1.166 INCHES MAXIMUM IN
Material Thickness
0.045 INCHES NOMINAL IN
Material
STEEL OVERALL
Hole Diameter
0.704 INCHES MINIMUM AND 0.728 INCHES MAXIMUM 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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6685-00-325-1527123000POSSIBLE MATCH
INDICATOR,TEMPERATURE,ELECTRICAL
Possible match (shared part number)Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems
6760-00-398-1923123000POSSIBLE MATCH
PLATE,SPINDLE SUPPORT
Possible match (shared part number)The Boeing Company Div Defense
5120-01-271-63001230-00POSSIBLE MATCH
SEATING TOOL,VALVE
Possible match (shared part number)Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
2520-01-274-9304306515400POSSIBLE MATCH
FLEXPLATE,TRANSMISSION
Possible match (shared part number)Cummins Inc.
7350-01-346-8294123000POSSIBLE MATCH
CUP,DISPOSABLE
Possible match (shared part number)Imperco Inc. Dba Imperial Paper Company
5330-01-577-6364123-000POSSIBLE MATCH
GASKET
Possible match (shared part number)Parker-Hannifin Corp Div Sporlan Division
6515-01-594-0826123000POSSIBLE MATCH
CYLINDER,BLOCK
Possible match (shared part number)Midmark Corporation Dba Midmark Corp
8125-01-595-8926123000POSSIBLE MATCH
BOTTLE,SNAP-ON CAP
Possible match (shared part number)Loritz & Associates, Inc. Dba Loritz & Associates Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
1230-00
3/9Design control — primary reference
Itw Shakeproof Automotive Products
Related Parts
6685-00-325-1527POSSIBLE MATCH
INDICATOR,TEMPERATURE,ELECTRICAL
123000
6760-00-398-1923POSSIBLE MATCH
PLATE,SPINDLE SUPPORT
123000
5120-01-271-6300POSSIBLE MATCH
SEATING TOOL,VALVE
1230-00
2520-01-274-9304POSSIBLE MATCH
FLEXPLATE,TRANSMISSION
306515400
7350-01-346-8294POSSIBLE MATCH
CUP,DISPOSABLE
123000
5330-01-577-6364POSSIBLE MATCH
GASKET
123-000
6515-01-594-0826POSSIBLE MATCH
CYLINDER,BLOCK
123000
8125-01-595-8926POSSIBLE MATCH
BOTTLE,SNAP-ON CAP
123000
Frequently Asked Questions
What is NSN 5310-00-285-5666?
NSN 5310-00-285-5666 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-285-5666?
8 possible matches (shared part number, not a government interchangeability claim): 6685-00-325-1527, 6760-00-398-1923, 5120-01-271-6300. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-285-5666?
Key specifications for 5310-00-285-5666: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 1.147 INCHES MINIMUM AND 1.166 INCHES MAXIMUM IN; Material Thickness: 0.045 INCHES NOMINAL IN; Material: STEEL OVERALL. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-285-5666 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.