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Technical Data Sheet
PartsTable / COMPONENT / 639333
639333 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, body_width: 0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, nut_height: 0.387 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN, body_height: 0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN, body_length: 0.785 INCHES MAXIMUM IN, nut_diameter: 0.412 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-153-8400, 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
639333
NSN: 5310-00-153-8400
FSC: 5310
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
body_width0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
nut_height0.387 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN
body_height0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
body_length0.785 INCHES MAXIMUM IN
nut_diameter0.412 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN
pilot_length0.075 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
pilot_diameter0.304 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
NSN5310-00-153-8400
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 639333 · 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
•
PILOT LENGTH: 0.075 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD QUANTITY PER INCH: 28
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
MATERIAL: STEEL COMP 8740 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
PILOT LENGTH0.075 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD QUANTITY PER INCH28
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
MATERIALSTEEL COMP 8740 OVERALL
NUT DIAMETER0.412 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
SNJ54LS126JInterchangeable
interchangeable cross-reference
interchangeable
019216002Interchangeable
interchangeable cross-reference
interchangeable
308-247Interchangeable
interchangeable cross-reference
interchangeable
LHL9249-5-4Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 639333?
639333 is a MICROCIRCUIT,DIGITAL.
What parts can replace 639333?
There are 4 known substitutes for 639333: SNJ54LS126J, 019216002, 308-247 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 639333?
639333 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-153-8400. 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