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Technical Data Sheet
PartsTable / COMPONENT / 3780 19
3780 19 ✓ 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: 1.062 INCHES NOMINAL IN, overall_length: 3.250 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 5310-00-812-2933, 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 19
NSN: 5310-00-812-2933
FSC: 5310
CAGE: 11757 — PARKER HANNIFIN CORPORATION DIV CHELSEA PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL ALLOY OVERALL
point_typeSPLIT
point_angle135.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length1.062 INCHES NOMINAL IN
flute_quantity2
overall_length3.250 INCHES NOMINAL IN
shank_diameter0.166 INCHES NOMINAL IN
special_featuresJOBBERS LG; SCREW MACHINE FLUTE LG; WIRE SIZE 19
cutting_end_styleGENERAL PURPOSE
nominal_cutting_diameter0.1660 INCHES IN
cutting_rotation_directionRIGHT-HAND
NSN5310-00-812-2933
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3780 19 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS
•
NUT STYLE: SLEEVE
•
THREAD CLASS: 2B
•
MATERIAL: STEEL OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
CROSS-SECTIONAL SHAPE: HEXAGONAL FLANGE
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.435 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS
NUT STYLESLEEVE
THREAD CLASS2B
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
CROSS-SECTIONAL SHAPEHEXAGONAL FLANGE
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.435 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SPECIAL FEATURESONE 0.100 IN. DIA. HOLE DRILLED THROUGH ONE SIDE OF PILOT 0.156 IN FROM END IN
THREAD QUANTITY PER INCH20
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
M25988/1-003Interchangeable
interchangeable cross-reference
interchangeable
2-003L1120-70Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-25988/1Interchangeable
interchangeable cross-reference
interchangeable
3780 19Interchangeable
interchangeable cross-reference
interchangeable
15929Interchangeable
interchangeable cross-reference
interchangeable
NAS907Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3780 19?
3780 19 is a DRILL,TWIST.
What parts can replace 3780 19?
There are 6 known substitutes for 3780 19: M25988/1-003, 2-003L1120-70, MIL-DTL-25988/1 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3780 19?
3780 19 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-812-2933. 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