PartsTable
Technical Data Sheet
NNU1318 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.064 INCHES NOMINAL IN, hole_diameter: 0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN, overall_diameter: 0.750 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-337-6977, 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
NNU1318
NSN: 5310-00-337-6977
FSC: 5310
CAGE: 28365 — TELEDYNE COLUMBIA-SUMMERILL CO DIV OF TELEDYNE INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.064 INCHES NOMINAL IN
hole_diameter0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
overall_diameter0.750 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 2 GRADE AND A CLASS
departure_from_cited_designatorAS MODIFIED BY ID
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-337-6977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NNU1318 · 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 DIAMETER: 0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
OVERALL DIAMETER: 0.750 INCHES NOMINAL IN
THICKNESS: 0.064 INCHES NOMINAL IN
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY ID
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
MATERIAL: STEEL OVERALL
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
OVERALL DIAMETER0.750 INCHES NOMINAL IN
THICKNESS0.064 INCHES NOMINAL IN
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY ID
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
NONDEFINITIVE SPEC/STD DATAA TYPE AND 2 GRADE AND A CLASS
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
981608-8Interchangeable
interchangeable cross-reference
interchangeable
LTX337Interchangeable
interchangeable cross-reference
interchangeable
399820-009Interchangeable
interchangeable cross-reference
interchangeable
FFW92TYPEAGRADE2CLASSAInterchangeable
Same NIIN cross-reference
interchangeable
G2608Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NNU1318?
NNU1318 is a WASHER,FLAT.
What parts can replace NNU1318?
There are 5 known substitutes for NNU1318: 981608-8, LTX337, 399820-009 and 2 more. Substitute compatibility should be verified for your specific system.
Is NNU1318 still available?
NNU1318 is currently cancelled.
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