NSN 5310-00-220-6552 · NIIN 002206552 · Part number 9S1328
Caterpillar Inc Div Caterpillar Defense · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 11083
Government record, cited
NSN 5310-00-220-6552 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-220-6552. Manufacturer of record part number: 9S1328.
Also searched as5310-00-220-6552 ·
5310002206552 ·
NIIN 002206552 ·
00-220-6552 ·
FSC 5310 Nuts and Washers · CAGE 11083 · 9S1328 · 1722A0 · 1722A
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Washer,flat, cataloged under National Stock Number 5310-00-220-6552, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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
5310-00-220-6552
Primary Part Number
9S1328
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
Overall Diameter
1.625 INCHES NOMINAL IN
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
STEEL OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
1.000 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.
2540-00-423-2682POSSIBLE MATCH
ABSORBER SHOCK
Possible match (shared part number)
6625-01-007-99571722APOSSIBLE MATCH
OSCILLOSCOPE
Possible match (shared part number)Keysight Technologies Inc
6210-01-345-963417-4-232-A-EB2-120VPOSSIBLE MATCH
FIXTURE,LIGHTING
Possible match (shared part number)H. E. Williams, Inc.
NSN 5310-00-220-6552 is a Washer,flat, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-00-220-6552?
NSN 5310-00-220-6552 has 3 manufacturer part numbers on file: 1722A0 (Caterpillar Inc Div Caterpillar Defense), 9S1328 (Caterpillar Inc Div Caterpillar Defense), 1722A (Caterpillar Inc Div Caterpillar Defense).
What NSN replaces 5310-00-220-6552?
4 possible matches (shared part number, not a government interchangeability claim): 2540-00-423-2682, 6625-01-007-9957, 6210-01-345-9634. Verify interchangeability with system specifications before substitution.
What are the specifications of 9S1328?
Key specifications for 9S1328: Overall Diameter: 1.625 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-220-6552 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.