PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 13778M
13778M ✓ 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 PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP B1112 OR STEEL COMP 1212 OVERALL, overall_length: 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN, shear_strength: 3540 DOUBLE POUNDS PER SQUARE INCH, first_end_style: OVAL, style_designator: FULL LENGTH GROOVE, surface_treatment: CADMIUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-290-9244, 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
13778M
NSN: 5315-00-290-9244
FSC: 5315
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL COMP B1112 OR STEEL COMP 1212 OVERALL
overall_length1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN
shear_strength3540 DOUBLE POUNDS PER SQUARE INCH
first_end_styleOVAL
style_designatorFULL LENGTH GROOVE
surface_treatmentCADMIUM OVERALL
first_end_locationBOTH ENDS
first_end_outer_radius0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN
pin_large_end_diameter0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
pin_small_end_diameter0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-290-9244
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 13778M · 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
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
FIRST END OUTER RADIUS: 0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN
•
PIN LARGE END DIAMETER: 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
FIRST END STYLE: OVAL
•
STYLE DESIGNATOR: FULL LENGTH GROOVE
•
PIN SMALL END DIAMETER: 0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
•
FIRST END LOCATION: BOTH ENDS
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
FIRST END OUTER RADIUS0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN
PIN LARGE END DIAMETER0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
FIRST END STYLEOVAL
STYLE DESIGNATORFULL LENGTH GROOVE
PIN SMALL END DIAMETER0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
FIRST END LOCATIONBOTH ENDS
SHEAR STRENGTH3540 DOUBLE POUNDS PER SQUARE INCH
OVERALL LENGTH1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
10500714Interchangeable
interchangeable cross-reference
interchangeable
1512779Interchangeable
interchangeable cross-reference
interchangeable
501817Interchangeable
interchangeable cross-reference
interchangeable
142511Interchangeable
Same NIIN cross-reference
interchangeable
11771AInterchangeable
Same NIIN cross-reference
interchangeable
C111824Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 13778M?
13778M is a PIN,GROOVED,HEADLESS.
What parts can replace 13778M?
There are 11 known substitutes for 13778M: 10500714, 1512779, 501817 and 8 more. Substitute compatibility should be verified for your specific system.
Is 13778M still available?
13778M is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026