The Washer,shouldered, cataloged under National Stock Number 5310-00-045-1816, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-045-1816
Item Name
Washer,shouldered
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Shoulder Height
0.020 INCHES NOMINAL IN
Style Designator
SHOULDERED
Outside Diameter
0.546 INCHES NOMINAL IN
Material Thickness
0.010 INCHES NOMINAL IN
Shoulder Diameter
0.290 INCHES NOMINAL IN
Surface Treatment
ANODIZE OVERALL
Material
ALUMINUM ALLOY OVERALL
Hole Diameter
0.286 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.
5325-00-231-6605NASM16491TY11 CL3 SI2POSSIBLE MATCH
GROMMET,METALLIC
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5325-00-641-0295POSSIBLE MATCH
GROMMET,METALLIC
Possible match (shared part number)
5325-00-641-2145POSSIBLE MATCH
GROMMET,METALLIC
Possible match (shared part number)
5325-01-250-65895-4-3351-29POSSIBLE MATCH
GROMMET,METALLIC
Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MS20230WA10
5/9Secondary reference
U.S. Government activity
MS20230WA10
3/2Design control — primary reference
U.S. Government activity
NASM16491
5/1Secondary reference
U.S. Government activity
Related Parts
5325-00-231-6605POSSIBLE MATCH
GROMMET,METALLIC
NASM16491TY11 CL3 SI2
5325-00-641-0295POSSIBLE MATCH
GROMMET,METALLIC
5325-00-641-2145POSSIBLE MATCH
GROMMET,METALLIC
5325-01-250-6589POSSIBLE MATCH
GROMMET,METALLIC
5-4-3351-29
Frequently Asked Questions
What is NSN 5310-00-045-1816?
NSN 5310-00-045-1816 is a Washer,shouldered, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-045-1816?
4 possible matches (shared part number, not a government interchangeability claim): 5325-00-231-6605, 5325-00-641-0295, 5325-00-641-2145. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-045-1816?
Key specifications for 5310-00-045-1816: Shoulder Height: 0.020 INCHES NOMINAL IN; Style Designator: SHOULDERED; Outside Diameter: 0.546 INCHES NOMINAL IN; Material Thickness: 0.010 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-045-1816 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.