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Technical Data Sheet
PartsTable / COMPONENT / 21-419
21-419 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The CONNECTOR,PLUG,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: STEEL, nut_style: HEXAGON, nut_height: 0.327 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN, thread_size: 1-5/8-24, thread_class: 2B, overall_width: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-1746, 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
21-419
NSN: 5310-00-275-1746
FSC: 5310
CAGE: 35918 — HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION (USA)
SPECIFICATIONS
materialSTEEL
nut_styleHEXAGON
nut_height0.327 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
thread_size1-5/8-24
thread_class2B
overall_width0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
thread_length0.375 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
thread_seriesUNF
overall_height0.266 INCHES NOMINAL IN
inside_diameter1.587 INCHES MINIMUM AND 1.592 INCHES MAXIMUM IN
outside_diameter1.710 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN
style_designatorSCREW ON
NSN5310-00-275-1746
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21-419 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL COMP 303 OVERALL
•
NOMINAL THREAD SIZE: 0.099 INCHES IN
•
THREAD QUANTITY PER INCH: 56
•
THREAD SERIES: UNF
•
WIDTH ACROSS FLATS: 0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.327 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD SIZE0.099 INCHES IN
THREAD QUANTITY PER INCH56
THREAD SERIESUNF
WIDTH ACROSS FLATS0.309 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
NUT HEIGHT0.327 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
43A25034Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-7560Interchangeable
interchangeable cross-reference
interchangeable
MS21964-17Interchangeable
interchangeable cross-reference
interchangeable
21419Interchangeable
interchangeable cross-reference
interchangeable
200327Interchangeable
interchangeable cross-reference
interchangeable
2-14-129Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-419?
21-419 is a CONNECTOR,PLUG,ELECTRICAL.
What parts can replace 21-419?
There are 10 known substitutes for 21-419: 43A25034, MIL-DTL-7560, MS21964-17 and 7 more. Substitute compatibility should be verified for your specific system.
Is 21-419 still available?
21-419 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