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Technical Data Sheet

ANSI B18.6.3.2-56UNC-2B — Technical Data Sheet

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— · 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), 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 under NSN 5310-00-551-4743, 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
ANSI B18.6.3.2-56UNC-2B
NSN: 5310-00-551-4743
FSC: 5310
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.180 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
nominal_thread_size0.086 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch56
material_document_and_classification66,COMP 18-8 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-551-4743
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ANSI B18.6.3.2-56UNC-2B · 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
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66,COMP 18-8 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 56
•
BEARING SURFACE TYPE: CHAMFERED
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66,COMP 18-8 FED STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH56
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.086 INCHES IN
THREAD CLASS2B
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.180 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
N226P5InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4157400-35InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
71910002001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
NLLHB05000InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI B18.6.3.2-56UNC-2B?
ANSI B18.6.3.2-56UNC-2B is a NUT,PLAIN,HEXAGON.
What parts can replace ANSI B18.6.3.2-56UNC-2B?
There are 4 known substitutes for ANSI B18.6.3.2-56UNC-2B: N226P5, 4157400-35, 71910002001 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ANSI B18.6.3.2-56UNC-2B?
ANSI B18.6.3.2-56UNC-2B is cataloged in the Federal Logistics Information System under NSN 5310-00-551-4743. This indicates validated use in U.S. government and defense supply chains.
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