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Technical Data Sheet
BBHX3LB5 ✓ 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,PLAIN,SLOTTED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.437 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-5253, 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
BBHX3LB5
NSN: 5310-00-012-5253
FSC: 5310
CAGE: 00000
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.437 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE OVERALL
width_across_flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch20
material_document_and_classificationQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-012-5253
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BBHX3LB5 · 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 DIRECTION: RIGHT-HAND
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.500 INCHES IN
THREAD QUANTITY PER INCH: 20
MATERIAL: STEEL OVERALL
NUT STYLE: SLOTTED, HEXAGON
SURFACE TREATMENT: PHOSPHATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD SERIESUNF
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD QUANTITY PER INCH20
MATERIALSTEEL OVERALL
NUT STYLESLOTTED, HEXAGON
SURFACE TREATMENTPHOSPHATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
FFN836GPBTYPE1STYLE3Interchangeable
interchangeable cross-reference
interchangeable
427639Interchangeable
interchangeable cross-reference
interchangeable
35-72Interchangeable
interchangeable cross-reference
interchangeable
125253Interchangeable
interchangeable cross-reference
interchangeable
NX2113PC24Interchangeable
interchangeable cross-reference
interchangeable
NAVYX1106PC7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BBHX3LB5?
BBHX3LB5 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace BBHX3LB5?
There are 21 known substitutes for BBHX3LB5: FFN836GPBTYPE1STYLE3, 427639, 35-72 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BBHX3LB5?
BBHX3LB5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-5253. This indicates validated use in U.S. government and defense supply chains.
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