PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS28778-8O-Ring

Cdk Mobile Systems Inc · NSN 5331-01-722-2601 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-722-2601 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-722-2601. Primary manufacturer part number: MS28778-8.
Features
  • O-Ring — FSC 5331
  • 2 verified cross-references
  • Primary manufacturer: Cdk Mobile Systems Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-722-2601, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Cdk Mobile Systems Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-722-2601
Primary Part NumberMS28778-8
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerCdk Mobile Systems Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5331-00-006-2249 INTERCHANGEABLE
O-Ring
5331-00-808-079410596841-5 INTERCHANGEABLE
O-Ring
Us Army Aviation and Missile Command
4730-01-092-6954 INTERCHANGEABLE
Locknut,tube Fitting
5331-01-220-1924 INTERCHANGEABLE
O-Ring
5331-01-273-1002 INTERCHANGEABLE
O-Ring
5330-01-549-8046MS28778-8 INTERCHANGEABLE
Packing,preformed
Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba
Cross-Reference Index
Part NumberManufacturer
MS28778-8 PRIMARY Cdk Mobile Systems Inc (USA)
CC13003078 Equipos Moviles De Campana Arpa Sa (ESP)
Related Parts
5331-00-006-2249INTERCHANGEABLE
O-RING
5331-00-808-0794INTERCHANGEABLE
O-RING
10596841-5
4730-01-092-6954INTERCHANGEABLE
LOCKNUT,TUBE FITTING
5331-01-220-1924INTERCHANGEABLE
O-RING
5331-01-273-1002INTERCHANGEABLE
O-RING
5330-01-549-8046INTERCHANGEABLE
PACKING,PREFORMED
MS28778-8

Frequently Asked Questions

What is NSN 5331-01-722-2601?

NSN 5331-01-722-2601 is a O-Ring, manufactured by Cdk Mobile Systems Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-722-2601?

NSN 5331-01-722-2601 has 2 cross-referenced part numbers: MS28778-8 (Cdk Mobile Systems Inc), CC13003078 (Equipos Moviles De Campana Arpa Sa).

What NSN replaces 5331-01-722-2601?

There are 6 known substitutes for 5331-01-722-2601: 5331-00-006-2249, 5331-00-808-0794, 4730-01-092-6954 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS28778-8?

Key specifications for MS28778-8: Part Name Assigned by Controlling Agency: PACKING 2 O RING; Special Features: CHECK VALVE. 2 total characteristics are documented in the Federal Logistics Information System.

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