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28-2121 — TERMINAL JUNCTION BLOCK,SECTIONA

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

28-2121: TERMINAL JUNCTION BLOCK,SECTIONA.

TERMINAL JUNCTION BLOCK,SECTIONA. Key specifications include material: STEEL COMP 1117, body_style: CHAMFERED ENDS, body_length: 2.4375 INCHES NOMINAL IN, design_type: MONOPOLE SINGLE ANTENNA ELEMENT, overall_length: 16.650 INCHES MINIMUM AND 16.690 INCHES MAXIMUM IN, outside_diameter: 0.75000 INCHES MINIMUM AND 0.75020 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-529-8233, 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
28-2121
NSN: 2805-00-529-8233
NIINs: 005298233, 013168086
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1117
body_styleCHAMFERED ENDS
body_length2.4375 INCHES NOMINAL IN
design_typeMONOPOLE SINGLE ANTENNA ELEMENT
overall_length16.650 INCHES MINIMUM AND 16.690 INCHES MAXIMUM IN
outside_diameter0.75000 INCHES MINIMUM AND 0.75020 INCHES MAXIMUM IN
overall_diameter0.910 INCHES MAXIMUM IN
fsc_application_dataANTENNAS
casehardening_indicatorNOT CASEHARDENED
end_chamfer_angle_in_deg45.0
metallic_hardness_rating62.0 MINIMUM ROCKWELL C AND 70.0 MAXIMUM ROCKWELL C
material_document_and_classificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1117 ASSN STD SINGLE MATERIAL RESPONSE
NSN2805-00-529-8233
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TERMINAL JUNCTION BLOCK,SECTIONA TITLE COMPONENT PN 28-2121 MFR TERMINAL JUNCTION BLOC
KEY FEATURES
•
FSC APPLICATION DATA: ENGINE,GASOLINE,NONAIRCRAFT
•
BODY STYLE: CHAMFERED ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1117 ASSN STD SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 0.75000 INCHES MINIMUM AND 0.75020 INCHES MAXIMUM IN
•
END CHAMFER ANGLE IN DEG: 45.0
•
BODY LENGTH: 2.4375 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL: STEEL COMP 1117
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAENGINE,GASOLINE,NONAIRCRAFT
BODY STYLECHAMFERED ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1117 ASSN STD SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER0.75000 INCHES MINIMUM AND 0.75020 INCHES MAXIMUM IN
END CHAMFER ANGLE IN DEG45.0
BODY LENGTH2.4375 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIALSTEEL COMP 1117
METALLIC HARDNESS RATING62.0 MINIMUM ROCKWELL C AND 70.0 MAXIMUM ROCKWELL C
SUBSTITUTES & CROSS-REFERENCES 6
112-0010Reference document
Same NSN cross-reference
Reference document — Secondary reference
P724Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
W9Z22Reference document
Same NSN cross-reference
Reference document — Secondary reference
112-10Reference document
Same NSN cross-reference
Reference document — Secondary reference
8409835Reference document
Same NSN cross-reference
Reference document — Secondary reference
112A10Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 28-2121?
28-2121 is a TERMINAL JUNCTION BLOCK,SECTIONA.
What parts can replace 28-2121?
There are 6 known substitutes for 28-2121: 112-0010, P724, W9Z22 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28-2121?
28-2121 is cataloged in the U.S. Government catalog under NSN 2805-00-529-8233. This indicates validated use in U.S. government and defense supply chains.
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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.