PartsTable
Technical Data Sheet
751-6405228 FIND 55 ✓ 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: NICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL, nut_style: HEXAGON, nut_height: 1.407 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNJC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-450-5591, 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
751-6405228 FIND 55
NSN: 5310-01-450-5591
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL
nut_styleHEXAGON
nut_height1.407 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNJC
hardness_rating80.0 ROCKWELL C MINIMUM
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats1.801 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN
nominal_thread_size1.125 INCHES IN
thread_quantity_per_inch7
NSN5310-01-450-5591
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 751-6405228 FIND 55 · 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
NOMINAL THREAD SIZE: 1.125 INCHES IN
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
HARDNESS RATING: 80.0 ROCKWELL C MINIMUM
THREAD QUANTITY PER INCH: 7
THREAD CLASS: 3B
NUT STYLE: HEXAGON
NUT HEIGHT: 1.407 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN
WIDTH ACROSS FLATS: 1.801 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE1.125 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
HARDNESS RATING80.0 ROCKWELL C MINIMUM
THREAD QUANTITY PER INCH7
THREAD CLASS3B
NUT STYLEHEXAGON
NUT HEIGHT1.407 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN
WIDTH ACROSS FLATS1.801 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN
THREAD SERIESUNJC
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
LOA041313-132L1Interchangeable
interchangeable cross-reference
interchangeable
203-4457005 PIECE 44Interchangeable
interchangeable cross-reference
interchangeable
H861-5200-132Interchangeable
interchangeable cross-reference
interchangeable
2643-820-12 ITEM 53Interchangeable
interchangeable cross-reference
interchangeable
211070737Interchangeable
interchangeable cross-reference
interchangeable
M25027/1-14CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 751-6405228 FIND 55?
751-6405228 FIND 55 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 751-6405228 FIND 55?
There are 20 known substitutes for 751-6405228 FIND 55: LOA041313-132L1, 203-4457005 PIECE 44, H861-5200-132 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 751-6405228 FIND 55?
751-6405228 FIND 55 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-450-5591. This indicates validated use in U.S. government and defense supply chains.
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