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PartsTable / COMPONENT / 3780 31
3780 31 ✓ 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 DRILL,TWIST is a the manufacturer industrial component. Key specifications include material: STEEL ALLOY OVERALL, point_type: SPLIT, point_angle: 135.0 DEGREES NOMINAL, shank_style: STRAIGHT ROUND, flute_length: 0.875 INCHES NOMINAL IN, overall_length: 2.750 INCHES NOMINAL 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 5310-01-144-2243, 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
3780 31
NSN: 5310-01-144-2243
FSC: 5310
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialSTEEL ALLOY OVERALL
point_typeSPLIT
point_angle135.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length0.875 INCHES NOMINAL IN
flute_quantity2
overall_length2.750 INCHES NOMINAL IN
shank_diameter0.120 INCHES NOMINAL IN
special_featuresJOBBERS LG; SCREW MACHINE FLUTE LG; WIRE SIZE 31
cutting_end_styleGENERAL PURPOSE
nominal_cutting_diameter0.1200 INCHES IN
cutting_rotation_directionRIGHT-HAND
NSN5310-01-144-2243
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3780 31 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
3780 31Interchangeable
interchangeable cross-reference
interchangeable
C15914Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3780 31?
3780 31 is a DRILL,TWIST.
What parts can replace 3780 31?
There are 2 known substitutes for 3780 31: 3780 31, C15914. Substitute compatibility should be verified for your specific system.
What is the NSN for 3780 31?
3780 31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-144-2243. 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