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Technical Data Sheet
1856840 ✓ 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 GUIDE,HELICAL GEAR is a the manufacturer industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, hole_diameter: 0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 5.970 INCHES MINIMUM AND 6.030 INCHES MAXIMUM IN, aperture_width: 5.120 INCHES NOMINAL IN, overall_length: 7.970 INCHES MINIMUM AND 8.030 INCHES MAXIMUM IN, aperture_length: 7.120 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2920-00-363-8306, 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
1856840
NSN: 2920-00-363-8306
FSC: 2920
CAGE: 16764 — GENERAL MOTORS CORP DELCO REMY DIV (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
hole_diameter0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width5.970 INCHES MINIMUM AND 6.030 INCHES MAXIMUM IN
aperture_width5.120 INCHES NOMINAL IN
overall_length7.970 INCHES MINIMUM AND 8.030 INCHES MAXIMUM IN
aperture_length7.120 INCHES NOMINAL IN
hardness_rating40.0 SHORE DUROMETER A MAXIMUM OVERALL
bolt_hole_quantity6
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-R-6855,CL 4,TY A,GR 40 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
outside_edge_to_bolt_hole_center_distance_along_width0.250 INCHES NOMINAL IN
NSN2920-00-363-8306
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUIDE,HELICAL GEAR TITLE COMPONENT PN 1856840 MFR GUIDE,HELICAL GEAR
KEY FEATURES
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL;1.438 IN. OD;1.188 IN. ID;0.375 IN. THK;TWO LUGS ON OUTSIDE DIA 90.0 APART IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL;1.438 IN. OD;1.188 IN. ID;0.375 IN. THK;TWO LUGS ON OUTSIDE DIA 90.0 APART IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
20221-3Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-7034/3Interchangeable
interchangeable cross-reference
interchangeable
37TB7Interchangeable
interchangeable cross-reference
interchangeable
1856840Interchangeable
interchangeable cross-reference
interchangeable
370737Interchangeable
Same NIIN cross-reference
interchangeable
1906081Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1856840?
1856840 is a GUIDE,HELICAL GEAR.
What parts can replace 1856840?
There are 6 known substitutes for 1856840: 20221-3, MIL-DTL-7034/3, 37TB7 and 3 more. Substitute compatibility should be verified for your specific system.
Is 1856840 still available?
1856840 is currently cancelled.
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