PartsTable
Technical Data Sheet
649734 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include width: 35.0 MILLIMETERS NOMINAL MM, length: 100.000 FEET NOMINAL FT, material: PLASTIC CELLULOSE ACETATE, film_type: STILL PICTURE, base_color: CLEAR, usage_form: ROLL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-199-3746, 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
649734
NSN: 5310-00-199-3746
FSC: 5310
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
width35.0 MILLIMETERS NOMINAL MM
length100.000 FEET NOMINAL FT
materialPLASTIC CELLULOSE ACETATE
film_typeSTILL PICTURE
base_colorCLEAR
usage_formROLL
film_subtypeCAMERA
emulsion_typeBLACK AND WHITE
exposure_index125 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION DAYLIGHT
precious_materialSILVER
reproduction_typeNEGATIVE
emulsion_sensitivityPANCHROMATIC
NSN5310-00-199-3746
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 649734 · 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
WASHER THICKNESS: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
NOMINAL THREAD SIZE: 0.250 INCHES IN
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH: 28
MATERIAL: STEEL COMP 1035 OVERALL
WASHER OUTSIDE DIAMETER: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
WASHER THICKNESS0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
OVERALL HEIGHT0.225 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH28
MATERIALSTEEL COMP 1035 OVERALL
WASHER OUTSIDE DIAMETER0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
THREAD CLASS3B
WIDTH ACROSS FLATS0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
ST1166-10Interchangeable
interchangeable cross-reference
interchangeable
564706Interchangeable
interchangeable cross-reference
interchangeable
LH9292-4Interchangeable
interchangeable cross-reference
interchangeable
649734Interchangeable
interchangeable cross-reference
interchangeable
FP4 PLUSInterchangeable
interchangeable cross-reference
interchangeable
B00106-4Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 649734?
649734 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 649734?
There are 8 known substitutes for 649734: ST1166-10, 564706, LH9292-4 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 649734?
649734 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-199-3746. This indicates validated use in U.S. government and defense supply chains.
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