NSN 5310-01-721-9261 · NIIN 017219261 · Part number 861640040
Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 830R7
Government record, cited
NSN 5310-01-721-9261 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-721-9261. Manufacturer of record part number: 861640040.
Also searched as5310-01-721-9261 ·
5310017219261 ·
NIIN 017219261 ·
01-721-9261 ·
FSC 5310 Nuts and Washers · CAGE 830R7 · 861640040 · 875034041 · 875034041-11
Manufacturer of record: Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
Identification
NSN: 5310-01-721-9261
NIIN: 017219261
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 861640040
Manufacturer: Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-721-9261, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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.
Catalog Facts
Item Name
Washer,flat
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Manufacturers
Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions (CAGE 830R7)
Technical Specifications
Parameter
Value
NSN
5310-01-721-9261
Primary Part Number
861640040
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5315-01-721-9274811071003POSSIBLE MATCH
PIN,COTTER
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
5310-01-721-9282810319017POSSIBLE MATCH
NUT,SELF-LOCKING,HEXAGON
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
5310-01-721-9288811069002POSSIBLE MATCH
PUSH ON NUT
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
4820-01-722-5103875034041POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions (USA)
Reference documents
Reference
Meaning
875034041
D/9Drawing number reference only
Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions
Related Parts
5315-01-721-9274POSSIBLE MATCH
PIN,COTTER
811071003
5310-01-721-9282POSSIBLE MATCH
NUT,SELF-LOCKING,HEXAGON
810319017
5310-01-721-9288POSSIBLE MATCH
PUSH ON NUT
811069002
4820-01-722-5103POSSIBLE MATCH
VALVE,SAFETY RELIEF
875034041
Frequently Asked Questions
What is NSN 5310-01-721-9261?
NSN 5310-01-721-9261 is a Washer,flat, manufactured by Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-721-9261?
NSN 5310-01-721-9261 has 2 manufacturer part numbers on file: 861640040 (Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions), 875034041-11 (Curtiss-Wright Electro-Mechanical Corp Div Fleet Solutions).
What NSN replaces 5310-01-721-9261?
4 possible matches (shared part number, not a government interchangeability claim): 5315-01-721-9274, 5310-01-721-9282, 5310-01-721-9288. Verify interchangeability with system specifications before substitution.
Is NSN 5310-01-721-9261 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.