The Washer,flat, cataloged under National Stock Number 5310-01-733-1222, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Washer,flat
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Technical Specifications
Parameter
Value
NSN
5310-01-733-1222
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5307-01-733-12276D66848-002POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5307-01-733-12366D66844-001POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5307-01-733-13326D66849-002POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5307-01-733-13406D66849-001POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5307-01-733-13466D64066-002POSSIBLE MATCH
STUD,PLAIN
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5310-01-733-13876D64070-001POSSIBLE MATCH
NUT,PLAIN,HEXAGON
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
5307-01-734-96326D66843-001POSSIBLE MATCH
STUD,CONTINUOUS THREAD
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
386B010018
3/2Design control — primary reference
U.S. Government activity
PL 90E7710
D/9Drawing number reference only
U.S. Government activity
Related Parts
5307-01-733-1227POSSIBLE MATCH
STUD,PLAIN
6D66848-002
5307-01-733-1236POSSIBLE MATCH
STUD,PLAIN
6D66844-001
5307-01-733-1332POSSIBLE MATCH
STUD,PLAIN
6D66849-002
5307-01-733-1340POSSIBLE MATCH
STUD,PLAIN
6D66849-001
5307-01-733-1346POSSIBLE MATCH
STUD,PLAIN
6D64066-002
5310-01-733-1387POSSIBLE MATCH
NUT,PLAIN,HEXAGON
6D64070-001
5307-01-734-9632POSSIBLE MATCH
STUD,CONTINUOUS THREAD
6D66843-001
Frequently Asked Questions
What is NSN 5310-01-733-1222?
NSN 5310-01-733-1222 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-01-733-1222?
7 possible matches (shared part number, not a government interchangeability claim): 5307-01-733-1227, 5307-01-733-1236, 5307-01-733-1332. Verify interchangeability with system specifications before substitution.
Is NSN 5310-01-733-1222 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.