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Technical Data Sheet
PartsTable / COMPONENT / 3780 45
3780 45 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The FLANGE,PIPE,SWIVEL RETAINING 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: 0.750 INCHES NOMINAL IN, overall_length: 2.125 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 4730-00-903-8642, 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 45
NSN: 4730-00-903-8642
FSC: 4730
CAGE: 01276 — DANFOSS POWER SOLUTIONS II, LLC (USA)
SPECIFICATIONS
materialSTEEL ALLOY OVERALL
point_typeSPLIT
point_angle135.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length0.750 INCHES NOMINAL IN
flute_quantity2
overall_length2.125 INCHES NOMINAL IN
shank_diameter0.082 INCHES NOMINAL IN
special_featuresCOBALT/HSS, JOBBERS LG; SCREW MACHINE FLUTE LG; WIRE SIZE 45
cutting_end_styleGENERAL PURPOSE
nominal_cutting_diameter0.0820 INCHES IN
cutting_rotation_directionRIGHT-HAND
NSN4730-00-903-8642
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3780 45 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: COPPER ALLOY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE
•
NONDEFINITIVE SPEC/STD DATA: EF TYPE
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
OPERATING PRESSURE AND TYPE: 250.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 425.0 FAHRENHEIT GAS AND 425.0 FAHRENHEIT OIL AND 425.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-20042 GOVERNMENT SPECIFICATION
•
THICKNESS: 0.810 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE
NONDEFINITIVE SPEC/STD DATAEF TYPE
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
OPERATING PRESSURE AND TYPE250.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 250.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED425.0 FAHRENHEIT GAS AND 425.0 FAHRENHEIT OIL AND 425.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
SPECIFICATION/STANDARD DATA81349-MIL-F-20042 GOVERNMENT SPECIFICATION
THICKNESS0.810 INCHES NOMINAL IN
BOLT HOLE QUANTITY6
NOMINAL PIPE SIZE FOR WHICH DESIGNED2.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
C15898Interchangeable
interchangeable cross-reference
interchangeable
NAS907Interchangeable
interchangeable cross-reference
interchangeable
45 3780Interchangeable
interchangeable cross-reference
interchangeable
3-78045-2-40Interchangeable
Same NIIN cross-reference
interchangeable
MIL-F-20042Interchangeable
Same NIIN cross-reference
interchangeable
3-74045-2-40Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3780 45?
3780 45 is a FLANGE,PIPE,SWIVEL RETAINING.
What parts can replace 3780 45?
There are 6 known substitutes for 3780 45: C15898, NAS907, 45 3780 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3780 45?
3780 45 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-903-8642. 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