PartsTable
Technical Data Sheet
A-A-52427 ✓ 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

NUT,PLAIN,SINGLE BALL SEAT,HEXAG. Key specifications include material: STEEL OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.880 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, hardness_rating: 88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 90.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-518-5566, 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
A-A-52427
NSN: 5310-00-518-5566
FSC: 5310
CAGE: 58536 — FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height0.880 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
hardness_rating88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 90.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
ball_seat_radius0.875 INCHES NOMINAL IN
thread_directionLEFT-HAND
surface_treatmentZINC AND CHROMATE OVERALL EXCEPT THREADS
width_across_flats1.485 INCHES NOMINAL IN
nominal_thread_size1.125 INCHES IN
thread_quantity_per_inch16
NSN5310-00-518-5566
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A-A-52427 · 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
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.750 INCHES IN
FEATURES PROVIDED: CASEHARDENED
THREAD QUANTITY PER INCH: 16
NUT HEIGHT: 0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
WIDTH ACROSS FLATS: 1.475 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
NOMINAL THREAD SIZE0.750 INCHES IN
FEATURES PROVIDEDCASEHARDENED
THREAD QUANTITY PER INCH16
NUT HEIGHT0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
WIDTH ACROSS FLATS1.475 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
THREAD CLASS2B
THREAD DIRECTIONLEFT-HAND
NUT STYLESINGLE BALL SEAT, HEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
535670Interchangeable
interchangeable cross-reference
interchangeable
534769Interchangeable
interchangeable cross-reference
interchangeable
293273Interchangeable
interchangeable cross-reference
interchangeable
847-12Interchangeable
interchangeable cross-reference
interchangeable
5310000537803Interchangeable
interchangeable cross-reference
interchangeable
11276Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-A-52427?
A-A-52427 is a NUT,PLAIN,SINGLE BALL SEAT,HEXAG.
What parts can replace A-A-52427?
There are 16 known substitutes for A-A-52427: 535670, 534769, 293273 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-A-52427?
A-A-52427 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-518-5566. This indicates validated use in U.S. government and defense supply chains.
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