PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

221-00O-Ring

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 5331-01-050-3838 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-050-3838 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-050-3838. Primary manufacturer part number: 221-00.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.062 INCHES NOMINAL IN
  • Material: RUBBER CHLOROPRENE CLASS CR
  • 4 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Chloroprene Class Cr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-01-050-3838, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-050-3838
Primary Part Number221-00
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Cross-Sectional Height0.062 INCHES NOMINAL IN
MaterialRUBBER CHLOROPRENE CLASS CR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6130-00-005-530922-100-115 INTERCHANGEABLE
Power Supply
Calex Mfg Co Inc
5977-00-375-273522100 INTERCHANGEABLE
Brush,electrical Contact
Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc
6645-00-449-2632 INTERCHANGEABLE
Pinnion-Cannon
5120-00-605-5385HW2001 INTERCHANGEABLE
Adapter,fastener Installation to
Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc
1040-00-938-896854A50D47 INTERCHANGEABLE
Tailpipe,nozzle
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5985-00-996-8579740053-1 INTERCHANGEABLE
Antenna
Lockheed Martin Corp
4320-01-197-7234 INTERCHANGEABLE
Impeller,pump,centrifugal
3040-01-498-191622100-50 INTERCHANGEABLE
Actuator,mechanical,nonaircraft
B.w. Elliott Manufacturing Co., Llc
3040-01-498-210612755-1 INTERCHANGEABLE
Spindle,mechanically Actuated
B.w. Elliott Manufacturing Co., Llc
3040-01-498-211112755-3 INTERCHANGEABLE
Spindle,mechanically Actuated
B.w. Elliott Manufacturing Co., Llc
Cross-Reference Index
Part NumberManufacturer
221-00 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
221 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40145-34 Zf Industrieantriebe Witten Gmbh (DEU)
40205-34 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
6130-00-005-5309INTERCHANGEABLE
POWER SUPPLY
22-100-115
5977-00-375-2735INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
22100
6645-00-449-2632INTERCHANGEABLE
PINNION-CANNON
5120-00-605-5385INTERCHANGEABLE
ADAPTER,FASTENER INSTALLATION TO
HW2001
1040-00-938-8968INTERCHANGEABLE
TAILPIPE,NOZZLE
54A50D47
5985-00-996-8579INTERCHANGEABLE
ANTENNA
740053-1
4320-01-197-7234INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
3040-01-498-1916INTERCHANGEABLE
ACTUATOR,MECHANICAL,NONAIRCRAFT
22100-50
3040-01-498-2106INTERCHANGEABLE
SPINDLE,MECHANICALLY ACTUATED
12755-1
3040-01-498-2111INTERCHANGEABLE
SPINDLE,MECHANICALLY ACTUATED
12755-3
5310-01-500-7252INTERCHANGEABLE
NUT,PLAIN,ROUND
A-810-20056-4
6515-01-521-9512INTERCHANGEABLE
SPECULUM SET,EAR
22100

Frequently Asked Questions

What is NSN 5331-01-050-3838?

NSN 5331-01-050-3838 is a O-Ring, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-050-3838?

NSN 5331-01-050-3838 has 4 cross-referenced part numbers: 221-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 221 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40145-34 (Zf Industrieantriebe Witten Gmbh), 40205-34 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 5331-01-050-3838?

There are 12 known substitutes for 5331-01-050-3838: 6130-00-005-5309, 5977-00-375-2735, 6645-00-449-2632 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 221-00?

Key specifications for 221-00: Cross-Sectional Height: 0.062 INCHES NOMINAL IN; Material: RUBBER CHLOROPRENE CLASS CR. 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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