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191D4 — PLUG,MACHINE THREAD

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

191D4: PLUG,MACHINE THREAD.

The PLUG,MACHINE THREAD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 845 OVERALL, core_depth: 0.531 INCHES NOMINAL IN, head_height: 0.344 INCHES NOMINAL IN, thread_class: 3A EXTERNAL A, thread_length: 0.250 INCHES NOMINAL EXTERNAL IN, overall_length: 0.656 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5365-00-521-4914, 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
191D4
NSN: 5365-00-521-4914
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY 845 OVERALL
core_depth0.531 INCHES NOMINAL IN
head_height0.344 INCHES NOMINAL IN
thread_class3A EXTERNAL A
thread_length0.250 INCHES NOMINAL EXTERNAL IN
overall_length0.656 INCHES NOMINAL IN
flange_diameter1.250 INCHES NOMINAL IN
connection_stylePLAIN
flange_thickness0.094 INCHES NOMINAL IN
thread_directionRIGHT-HAND EXTERNAL
body_core_diameter0.750 INCHES NOMINAL IN
nominal_thread_size1.000 INCHES EXTERNAL IN
NSN5365-00-521-4914
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PLUG,MACHINE THREAD TITLE COMPONENT PN 191D4 MFR PLUG,MACHINE THREAD
KEY FEATURES
•
FLANGE DIAMETER: 1.250 INCHES NOMINAL IN
•
BODY CORE DIAMETER: 0.750 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.344 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.094 INCHES NOMINAL IN
•
CONNECTION STYLE: PLAIN
•
CORE DEPTH: 0.531 INCHES NOMINAL IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL EXTERNAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-621-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER1.250 INCHES NOMINAL IN
BODY CORE DIAMETER0.750 INCHES NOMINAL IN
HEAD HEIGHT0.344 INCHES NOMINAL IN
FLANGE THICKNESS0.094 INCHES NOMINAL IN
CONNECTION STYLEPLAIN
CORE DEPTH0.531 INCHES NOMINAL IN
THREAD LENGTH0.250 INCHES NOMINAL EXTERNAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-621-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.656 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
SUBSTITUTES & CROSS-REFERENCES 2
A214914Reference document
Same NSN cross-reference
Reference document — Secondary reference
304971Reference 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 191D4?
191D4 is a PLUG,MACHINE THREAD.
What parts can replace 191D4?
There are 2 known substitutes for 191D4: A214914, 304971. Substitute compatibility should be verified for your specific system.
What is the NSN for 191D4?
191D4 is cataloged in the U.S. Government catalog under NSN 5365-00-521-4914. 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.