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PartsTable / COMPONENT / 1657-19-4
1657-19-4 ✓ 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 BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, cup_width: 0.6250 INCHES NOMINAL IN, cone_width: 0.7620 INCHES NOMINAL IN, bore_diameter: 1.0000 INCHES NOMINAL IN, overall_width: 0.7813 INCHES NOMINAL IN, standout_width: 0.1563 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5940-00-080-8996, 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
1657-19-4
NSN: 5940-00-080-8996
FSC: 5940
CAGE: 21355 — LTA/D-CEMCO INC DBA D-CEMCO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.6250 INCHES NOMINAL IN
cone_width0.7620 INCHES NOMINAL IN
bore_diameter1.0000 INCHES NOMINAL IN
overall_width0.7813 INCHES NOMINAL IN
standout_width0.1563 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0460 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter2.3125 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN5940-00-080-8996
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BOOT,DUST AND MOISTURE SEAL TITLE COMPONENT PN 1657-19-4 MFR BOOT,DUST AND MOISTURE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
71750Interchangeable
interchangeable cross-reference
interchangeable
313407Interchangeable
interchangeable cross-reference
interchangeable
SK203-45Interchangeable
interchangeable cross-reference
interchangeable
223229Interchangeable
interchangeable cross-reference
interchangeable
1986-1931Interchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1657-19-4?
1657-19-4 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace 1657-19-4?
There are 24 known substitutes for 1657-19-4: 71750, 313407, SK203-45 and 21 more. Substitute compatibility should be verified for your specific system.
Is 1657-19-4 still available?
1657-19-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026