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Technical Data Sheet
55242 ✓ Verified by PartsTable
Tactic · 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 MICROCIRCUIT,DIGITAL is a Tactic industrial component. Key specifications include material: STEEL, nut_style: HEXAGON, nut_height: 0.271 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-088-0553, 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
55242
NSN: 5310-00-088-0553
FSC: 5310
CAGE: 27235 — HARDIE-TYNES CO., INC. (USA)
SPECIFICATIONS
materialSTEEL
nut_styleHEXAGON
nut_height0.271 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
overall_width44.00 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_length39.00 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
overall_diameter39.00 INCHES NOMINAL IN
thread_directionRIGHT-HAND
NSN5310-00-088-0553
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 55242 · Tactic ⚠ 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
NUT STYLE: HEXAGON
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE: 0.312 INCHES IN
WIDTH ACROSS FLATS: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENT: CADMIUM AND CHROMATE NUT
BEARING SURFACE FINISH: 125.0 MICROINCHES
LUBRICATION: SOLUBLE LUBRICANT
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE0.312 INCHES IN
WIDTH ACROSS FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE NUT
BEARING SURFACE FINISH125.0 MICROINCHES
LUBRICATIONSOLUBLE LUBRICANT
THREAD QUANTITY PER INCH24
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
870126-1Interchangeable
interchangeable cross-reference
interchangeable
870126Interchangeable
interchangeable cross-reference
interchangeable
55242Interchangeable
interchangeable cross-reference
interchangeable
U6A909351XInterchangeable
interchangeable cross-reference
interchangeable
SW705-1PInterchangeable
interchangeable cross-reference
interchangeable
1666195Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55242?
55242 is a MICROCIRCUIT,DIGITAL manufactured by Tactic.
What parts can replace 55242?
There are 16 known substitutes for 55242: 870126-1, 870126, 55242 and 13 more. Substitute compatibility should be verified for your specific system.
Is 55242 still available?
55242 is currently cancelled.
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