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Technical Data Sheet
PartsTable / COMPONENT / 3752-12
3752-12 ✓ 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 COUPLING HALF,SELF-SEALING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, seat_angle: 37.0 DEGREES LOCATION NOT OTHERWISE SPECIFIED, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION, connection_style: FLARELESS ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-680-8774, 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
3752-12
NSN: 5315-00-680-8774
FSC: 5315
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
seat_angle37.0 DEGREES LOCATION NOT OTHERWISE SPECIFIED
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARELESS ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
operating_pressure1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.062 INCHES ALL ENDS IN
maximum_operating_temp150.0 FAHRENHEIT SINGLE RESPONSE DEGF
media_for_which_designedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
thread_quantity_per_inch12 ALL ENDS
NSN5315-00-680-8774
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3752-12 · 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 ARRANGEMENT STYLE: ONE END DRILLED
•
HEAD STYLE: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
•
HEIGHT: 0.037 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CHAMFER LENGTH: 0.037 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: STRAIGHT
•
PIN CHAMFER ANGLE: 15.0 DEGREES NOMINAL
•
FIRST HOLE DIAMETER: 0.065 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE ARRANGEMENT STYLEONE END DRILLED
HEAD STYLEPAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
HEIGHT0.037 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CHAMFER LENGTH0.037 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
STYLE DESIGNATORSTRAIGHT
PIN CHAMFER ANGLE15.0 DEGREES NOMINAL
FIRST HOLE DIAMETER0.065 INCHES NOMINAL IN
PIN HEAD DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
DIAMETER0.1888 INCHES MINIMUM AND 0.1893 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
ISOTON IIInterchangeable
interchangeable cross-reference
interchangeable
375-212Interchangeable
interchangeable cross-reference
interchangeable
8546719Interchangeable
interchangeable cross-reference
interchangeable
7546719Interchangeable
interchangeable cross-reference
interchangeable
COUNT-A-PARTInterchangeable
interchangeable cross-reference
interchangeable
3752Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3752-12?
3752-12 is a COUPLING HALF,SELF-SEALING.
What parts can replace 3752-12?
There are 6 known substitutes for 3752-12: ISOTON II, 375-212, 8546719 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3752-12?
3752-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-680-8774. 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