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ST-840 — TESTER,INTERNAL COMBUSTION ENGIN

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

ST-840: TESTER,INTERNAL COMBUSTION ENGIN.

TESTER,INTERNAL COMBUSTION ENGIN. Key specifications include material: STEEL OVERALL, overall_length: 2.062 INCHES NOMINAL IN, drive_end_shape: SQUARE SINGLE END INTERNAL, style_designator: INTERNAL-INTERNAL, features_provided: MANUAL TOOL, surface_treatment: CHROMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3460-00-474-8678, 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
ST-840
NSN: 3460-00-474-8678
NIINs: 004748678, 009991269, 014614059
FSC: 3460 — Machine Tool Accessories
CAGE: 58436 — SUNNEN PRODUCTS CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length2.062 INCHES NOMINAL IN
drive_end_shapeSQUARE SINGLE END INTERNAL
style_designatorINTERNAL-INTERNAL
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.500 INCHES NOMINAL SINGLE END IN
wrenching_surface_size1.250 INCHES NOMINAL SINGLE END IN
wrenching_surface_shape8 POINT SINGLE END INTERNAL
drive_end_outside_diameter2.062 INCHES NOMINAL IN
wrenching_end_opening_depth0.906 INCHES NOMINAL IN
wrenching_end_outside_diameter2.062 INCHES NOMINAL IN
NSN3460-00-474-8678
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TESTER,INTERNAL COMBUSTION ENGIN TITLE COMPONENT PN ST-840 MFR TESTER,INTERNAL COMBUS
KEY FEATURES
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: MANDREL SIZE RANGE 0.840 TO 0.900 IN. IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONMANDREL SIZE RANGE 0.840 TO 0.900 IN. IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST-840?
ST-840 is a TESTER,INTERNAL COMBUSTION ENGIN.
What is the NSN for ST-840?
ST-840 is cataloged in the U.S. Government catalog under NSN 3460-00-474-8678. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.