PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4365O-Ring

Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division · NSN 5331-01-559-4842 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-559-4842 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-559-4842. Primary manufacturer part number: 4365.
Features
  • O-Ring — FSC 5331
  • 3 verified cross-references
  • Primary manufacturer: Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-559-4842, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersRomac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (CAGE 90800)
Technical Specifications
ParameterValue
NSN5331-01-559-4842
Primary Part Number4365
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerRomac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-141-2817 INTERCHANGEABLE
Screw,machine
5331-00-167-2594436-5REVB INTERCHANGEABLE
O-Ring
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5905-00-795-19554365 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
6240-00-892-4420 INTERCHANGEABLE
Lamp,glow
3040-01-270-5928 INTERCHANGEABLE
Brake Drum
5331-01-389-918884001554-904 INTERCHANGEABLE
O-Ring
Woodward Hrt Inc
4820-01-432-59692352-1161A INTERCHANGEABLE
Valve,flow Control
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-432-65875863-16SK INTERCHANGEABLE
Parts Kit,valve
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-468-90175863-11SK INTERCHANGEABLE
Parts Kit,valve
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-469-75975863-12SK INTERCHANGEABLE
Parts Kit,valve
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
Cross-Reference Index
Part NumberManufacturer
4365 PRIMARY Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
7093-CITEM14 Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
7093-C Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
Related Parts
5305-00-141-2817INTERCHANGEABLE
SCREW,MACHINE
5331-00-167-2594INTERCHANGEABLE
O-RING
436-5REVB
5905-00-795-1955INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
4365
6240-00-892-4420INTERCHANGEABLE
LAMP,GLOW
3040-01-270-5928INTERCHANGEABLE
BRAKE DRUM
5331-01-389-9188INTERCHANGEABLE
O-RING
84001554-904
4820-01-432-5969INTERCHANGEABLE
VALVE,FLOW CONTROL
2352-1161A
4820-01-432-6587INTERCHANGEABLE
PARTS KIT,VALVE
5863-16SK
4820-01-468-9017INTERCHANGEABLE
PARTS KIT,VALVE
5863-11SK
4820-01-469-7597INTERCHANGEABLE
PARTS KIT,VALVE
5863-12SK
4820-01-501-0372INTERCHANGEABLE
PARTS KIT,VALVE
5863-7SK
4820-01-502-6962INTERCHANGEABLE
VALVE,CALIBRATED FLOW
2352-1201A 1.00 IN.

Frequently Asked Questions

What is NSN 5331-01-559-4842?

NSN 5331-01-559-4842 is a O-Ring, manufactured by Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-559-4842?

NSN 5331-01-559-4842 has 3 cross-referenced part numbers: 4365 (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division), 7093-CITEM14 (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division), 7093-C (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division).

What NSN replaces 5331-01-559-4842?

There are 12 known substitutes for 5331-01-559-4842: 5305-00-141-2817, 5331-00-167-2594, 5905-00-795-1955 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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