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Spark Gap

NSN: 5841-01-054-6758 | Model: 0GP44R21
ITAR Registered seal

An item designed to act as a switching or triggering device by means of a disruptive discharge of electricity (a spark) between the electrodes. The insulation (usually air) between the electrodes is self-restoring after passage of the spark. For spark gaps used as a protective device, see arrester, electrical surge. For items with additional circuitry which perform complete modulation functions, see modulator, radar.

NSN Properties and Flags
NATO Stock Number
Yes - ITAR Controlled (Code B)
Overall Length
1.780 inches
Overall Diameter
0.520 inches
Gap Type
Electrode Material
Adjustability Feature
Not included

Pricing and Availability

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NSN 5841-01-054-6758 Datasheet

Supply Class (FSC):
Airborne Radar Equipment
Cross Reference:
  • 0GP44R21
  • 700840
  • 700840
Cage Codes:
  • Excelitas Technologies Corp. (CAGE 25506)
  • Rantec Microwave Systems, Inc. (CAGE 04971)
  • Rantec Power Systems Inc. (CAGE 60132)
Schedule B & Trade:
  • Schedule B: 8529904720 (NAICS 334511)

    Radar apparatus parts

  • SITC: 76493

    Parts of television receivers, radiobroadcast receivers, transmission apparatus for radio telephony, telegraphy, broadcasting or television etc.

  • End Use: 21400

    Telecommunications equipment


Y - Indicates information is in the hazardous materials information resource system (hmirs).


A - Item does not contain precious metal.


- Represents items with no adp components


- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    061300 - Circuit breaker/switch noi

  • WCC:

    72D - Communications/electronics, other than sigint/ew or comsec repair parts and components

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    H - Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)

  • LTL:

    P - 77.5

  • SHC:

    Z - Other or no special handling required (sh)

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
  • AAC
  • Quantity per pack
  • Unit of Measure
  • Shelf Life
  • Classification Control
  • Repariability

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $1,626.64 to $2,711.07..
Does NSN 5841-01-054-6758 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Department Of The Navy, Brazil, Singapore, Saudi Arabia, and Republic Of Korea
What is the NIIN of NSN 5841-01-054-6758?
010546758 or 01-054-6758
Does NSN 5841-01-054-6758 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5841-01-054-6758?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 24, 1978

Material Safety



Ld50 lc50 mixture: tlv: 1250 millirems/quarter,whole body.

routes of entry: inhalation: yes skin: no ingestion: no
reports of carcinogenicity: ntp: no iarc: no osha: no
health hazards acute and chronic: helium, nitrogen, and krypton-85 are
nontoxic, but each may act as a simple asphyxiant. Oxygen is
nontoxic. Krypton-85 is a radioactive isotope. Overexposure may
cause asphyxiation, radiation sickness .

effects of overexposure: oxygen below 21%: asphyxiation: symptoms
include dizziness, headache, nausea, and loss of consciousness.

oxygen above 21%: asphyxiation, chest pain and a variety of central
nervous system manifestatio ns, including tingling extremities.

radiation sickness: symptoms include nausea, vomiting, diarrhea,
and depression.

medical cond aggravated by exposure: none listed.

First Aid

First aid: inhalation is primary route of entry. Move victim to fresh
air. If breathing has stopped, give cpr and, if needed, oxygen. Get
medical attention. Radiation sickness: get medical aid immediately.

Chemical Properties

Hcc: a2
solubility in water: slight
appearance and odor: colorless gas. Odorless.

percent volatiles by volume: 100%


Stability indicator/materials to avoid: yes
avoid other radioactive materials and flammables.

stability condition to avoid: keep away from excessive heat.

hazardous decomposition products: beta particles and gamma rays.

conditions to avoid polymerization: will not occur. Keep away from
excessive heat.

Proper Disposal

Waste disposal methods: replace the cylinder valve outlet plug. Replace
the cylinder cap. If no leaks are observed, return the cylinder to
your supplier.

disclaimer (provided with this information by the compiling agencies):
this information is formulated for use by elements of the department
of defense. the united states of america in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.

Ingredients List

Ingred name: helium/oxygen/nitrogen/krypton-85 gas mixture
fraction by wt: 100%
other rec limits: none recommended