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Technical Data Sheet
SH20A ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SPARK PLUG is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: 8 IN. LG O/A,4 IN.

LG BODY,2 IN. LG TIP EACH END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2920-00-580-4931, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
SH20A
NSN: 2920-00-580-4931
FSC: 2920
CAGE: 14170 — HUGHES MISSILE SYSTEMS CO SAN DIEGO (USA)
SPECIFICATIONS
general_characteristics_item_description8 IN. LG O/A,4 IN. LG BODY,2 IN. LG TIP EACH END IN
NSN2920-00-580-4931
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPARK PLUG TITLE COMPONENT PN SH20A MFR SPARK PLUG
KEY FEATURES
DC RESISTANCE RATING IN OHMS: 1000.0 NOMINAL
ELECTRODE STYLE: TRIPLE GAP GROUND ELECTRODE
BARREL INSIDE DIAMETER: 0.459 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
SHIELD THREAD LENGTH: 0.250 INCHES NOMINAL IN
TOP TO SHIELD THREAD DISTANCE: 0.120 INCHES NOMINAL IN
TERMINAL SLEEVE INSIDE DIAMETER: 0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
SEAT MAJOR DIAMETER: 0.965 INCHES NOMINAL IN
HEIGHT ABOVE MOUNTING SURFACE: 2.500 INCHES MINIMUM AND 2.624 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
DC RESISTANCE RATING IN OHMS1000.0 NOMINAL
ELECTRODE STYLETRIPLE GAP GROUND ELECTRODE
BARREL INSIDE DIAMETER0.459 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
SHIELD THREAD LENGTH0.250 INCHES NOMINAL IN
TOP TO SHIELD THREAD DISTANCE0.120 INCHES NOMINAL IN
TERMINAL SLEEVE INSIDE DIAMETER0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN
SEAT MAJOR DIAMETER0.965 INCHES NOMINAL IN
HEIGHT ABOVE MOUNTING SURFACE2.500 INCHES MINIMUM AND 2.624 INCHES MAXIMUM IN
SPECIAL FEATURESITEM IS USED ON ARMY TRUCKS
TOP TO TERMINAL CONTACT DISTANCE1.000 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
SH20AInterchangeable
interchangeable cross-reference
interchangeable
TN33Interchangeable
interchangeable cross-reference
interchangeable
35-934Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SH20A?
SH20A is a SPARK PLUG.
What parts can replace SH20A?
There are 3 known substitutes for SH20A: SH20A, TN33, 35-934. Substitute compatibility should be verified for your specific system.
Is SH20A still available?
SH20A is currently cancelled.
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