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3-221-404 — PLUG,MACHINE THREAD

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

3-221-404: PLUG,MACHINE THREAD.

The PLUG,MACHINE THREAD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 706 OVERALL, head_type: SOLID, head_height: 0.573 INCHES MINIMUM AND 0.613 INCHES MAXIMUM IN, thread_class: 2A EXTERNAL A, thread_length: 0.449 INCHES MINIMUM AND 0.474 INCHES MAXIMUM EXTERNAL IN, overall_length: 1.172 INCHES MINIMUM AND 1.202 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5365-01-175-1129, 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
3-221-404
NSN: 5365-01-175-1129
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 54539 — ENERQUIP, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 706 OVERALL
head_typeSOLID
head_height0.573 INCHES MINIMUM AND 0.613 INCHES MAXIMUM IN
thread_class2A EXTERNAL A
thread_length0.449 INCHES MINIMUM AND 0.474 INCHES MAXIMUM EXTERNAL IN
overall_length1.172 INCHES MINIMUM AND 1.202 INCHES MAXIMUM IN
connection_stylePLAIN
style_designatorPLUG, MACHINE
thread_directionRIGHT-HAND EXTERNAL
nominal_thread_size1.062 INCHES EXTERNAL IN
thread_quantity_per_inch12 EXTERNAL
thread_series_designatorUN EXTERNAL
NSN5365-01-175-1129
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PLUG,MACHINE THREAD TITLE COMPONENT PN 3-221-404 MFR PLUG,MACHINE THREAD
KEY FEATURES
•
HEAD HEIGHT: 0.573 INCHES MINIMUM AND 0.613 INCHES MAXIMUM IN
•
HEAD TYPE: SOLID
•
CONNECTION STYLE: PLAIN
•
THREAD LENGTH: 0.449 INCHES MINIMUM AND 0.474 INCHES MAXIMUM EXTERNAL IN
•
STYLE DESIGNATOR: PLUG, MACHINE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.573 INCHES MINIMUM AND 0.613 INCHES MAXIMUM IN
HEAD TYPESOLID
CONNECTION STYLEPLAIN
THREAD LENGTH0.449 INCHES MINIMUM AND 0.474 INCHES MAXIMUM EXTERNAL IN
STYLE DESIGNATORPLUG, MACHINE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH1.172 INCHES MINIMUM AND 1.202 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL THREAD SIZE1.062 INCHES EXTERNAL IN
THREAD CLASS2A EXTERNAL A
OTHER ITEMS IN FSC 5365 — Bushings, Rings, Shims, and Spacers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5365-00-000-6078 5365-00-000-7436 5365-00-001-1292 5365-00-001-1365 5365-00-001-1841 5365-00-001-1915 5365-00-001-1916 5365-00-001-1940
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3-221-404?
3-221-404 is a PLUG,MACHINE THREAD.
What is the NSN for 3-221-404?
3-221-404 is cataloged in the U.S. Government catalog under NSN 5365-01-175-1129. 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.