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Technical Data Sheet
PartsTable / MOUNT,RESILIENT,WEAPON SYSTEM / 21840-1

21840-1 — Technical Data Sheet

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— · 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 FRAME,SEAT,VEHICULAR is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, slot_depth: 0.187 INCHES SINGLE END IN, slot_width: 0.070 INCHES SINGLE END IN, swage_depth: 0.109 INCHES IN, largest_width: 0.156 INCHES SINGLE END IN, overall_height: 0.452 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5342-00-445-0176, 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
21840-1
NSN: 5342-00-445-0176
FSC: 5342 — MOUNT,RESILIENT,WEAPON SYSTEM
CAGE: 53655 — AVOX SYSTEMS INC DBA AVOX SYSTEMS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
slot_depth0.187 INCHES SINGLE END IN
slot_width0.070 INCHES SINGLE END IN
swage_depth0.109 INCHES IN
largest_width0.156 INCHES SINGLE END IN
overall_height0.452 INCHES IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleSQUARE W/THRU HOLE
terminal_length0.343 INCHES IN
overall_diameter0.156 INCHES IN
basic_shape_styleTUBULAR, ROUND
precious_materialGOLD AND SILVER
NSN5342-00-445-0176
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FRAME,SEAT,VEHICULAR TITLE COMPONENT PN 21840-1 MFR FRAME,SEAT,VEHICULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
480-B-4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
140-1784-2-05InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
J108P53BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PLGA2184010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
9903-005300-003InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS17158-1InterchangeableGOVERNMENT REGISTRY
Terminal,stud
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21840-1?
21840-1 is a FRAME,SEAT,VEHICULAR.
What parts can replace 21840-1?
There are 13 known substitutes for 21840-1: 480-B-4, 140-1784-2-05, J108P53B and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21840-1?
21840-1 is cataloged in the Federal Logistics Information System under NSN 5342-00-445-0176. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026