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NT721018 ✓ 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 NUT,CAP is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CAP, nut_height: 0.656 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNEF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-035-0868, 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
NT721018
NSN: 5310-01-035-0868
FSC: 5310
CAGE: 24956 — UNITED TECHNOLOGIES CORP ELECTRO SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCAP
nut_height0.656 INCHES NOMINAL IN
thread_class2B
thread_seriesUNEF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch32
NSN5310-01-035-0868
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NT721018 · 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 OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD SERIES: UNEF
•
THREAD QUANTITY PER INCH: 32
•
WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
NOMINAL THREAD SIZE0.312 INCHES IN
BEARING SURFACE TYPEWASHER FACED
THREAD SERIESUNEF
THREAD QUANTITY PER INCH32
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NUT STYLECAP
NUT HEIGHT0.656 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
1400132-18Interchangeable
interchangeable cross-reference
interchangeable
60825Interchangeable
interchangeable cross-reference
interchangeable
PA3181Interchangeable
interchangeable cross-reference
interchangeable
ASTM B221Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
NT721018Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NT721018?
NT721018 is a NUT,CAP.
What parts can replace NT721018?
There are 10 known substitutes for NT721018: 1400132-18, 60825, PA3181 and 7 more. Substitute compatibility should be verified for your specific system.
Is NT721018 still available?
NT721018 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