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PartsTable / COMPONENT / N66-02-001BPC37
N66-02-001BPC37 ✓ 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,SQUARE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1045 OVERALL, nut_style: SQUARE, nut_height: 1.125 INCHES NOMINAL IN, thread_class: 3B, 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 5310-00-275-1983, 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
N66-02-001BPC37
NSN: 5310-00-275-1983
FSC: 5310
CAGE: 51228 — ECOLAIRE INC BALDWIN-HAMILTON CO DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1045 OVERALL
nut_styleSQUARE
nut_height1.125 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats1.750 INCHES NOMINAL IN
nominal_thread_size1.125 INCHES IN
bearing_surface_typeFLAT
hole_configuration_styleCONFIGURATION D
thread_quantity_per_inch12
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-275-1983
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: N66-02-001BPC37 · 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
•
HOLE CONFIGURATION STYLE: CONFIGURATION D
•
NOMINAL THREAD SIZE: 1.125 INCHES IN
•
THREAD CLASS: 3B
•
WIDTH ACROSS FLATS: 1.750 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 12
•
NUT HEIGHT: 1.125 INCHES NOMINAL IN
•
NUT STYLE: SQUARE
TECHNICAL CHARACTERISTICS (FLIS)
HOLE CONFIGURATION STYLECONFIGURATION D
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
NOMINAL THREAD SIZE1.125 INCHES IN
THREAD CLASS3B
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
THREAD QUANTITY PER INCH12
NUT HEIGHT1.125 INCHES NOMINAL IN
NUT STYLESQUARE
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
6002-125Interchangeable
interchangeable cross-reference
interchangeable
00791Interchangeable
interchangeable cross-reference
interchangeable
0791Interchangeable
interchangeable cross-reference
interchangeable
N66-02-002BPC37Interchangeable
Same NIIN cross-reference
interchangeable
N68-02-003BPC33Interchangeable
Same NIIN cross-reference
interchangeable
N60-71-001ITEM3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N66-02-001BPC37?
N66-02-001BPC37 is a NUT,PLAIN,SQUARE.
What parts can replace N66-02-001BPC37?
There are 8 known substitutes for N66-02-001BPC37: 6002-125, 00791, 0791 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N66-02-001BPC37?
N66-02-001BPC37 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-1983. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026