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Technical Data Sheet
PartsTable / COMPONENT / ANN5B
ANN5B ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.203 INCHES NOMINAL IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-282-0512, 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
ANN5B
NSN: 5310-00-282-0512
FSC: 5310
CAGE: 81532 — ECHO INDUSTRIES, INC. DBA ECHO INDUSTRIES DIV ECHO INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.203 INCHES NOMINAL IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-00-282-0512
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ANN5B · 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 CLASS: 3B
•
THREAD DIRECTION: RIGHT-HAND
•
BEARING SURFACE TYPE: CHAMFERED
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 32
•
NUT STYLE: HEXAGON
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
BEARING SURFACE TYPECHAMFERED
NOMINAL THREAD SIZE0.190 INCHES IN
THREAD SERIESUNF
THREAD QUANTITY PER INCH32
NUT STYLEHEXAGON
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
WIDTH ACROSS FLATS0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
AN365-640CInterchangeable
interchangeable cross-reference
interchangeable
1801-60Interchangeable
interchangeable cross-reference
interchangeable
ANN5BInterchangeable
interchangeable cross-reference
interchangeable
853881Interchangeable
interchangeable cross-reference
interchangeable
AN364-428Interchangeable
interchangeable cross-reference
interchangeable
30150Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANN5B?
ANN5B is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace ANN5B?
There are 15 known substitutes for ANN5B: AN365-640C, 1801-60, ANN5B and 12 more. Substitute compatibility should be verified for your specific system.
Is ANN5B still available?
ANN5B 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