PartsTable
Technical Data Sheet
203431 ✓ 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,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, seat_angle: 37.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 2.840 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION, connection_style: FLARED ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-052-6900, 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
203431
NSN: 5310-00-052-6900
FSC: 5310
CAGE: 14802 — MANDZAK INSTRUMENTATION SPECIALISTS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
seat_angle37.0 DEGREES
thread_class3A ALL ENDS A
overall_length2.840 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARED ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSAFETY LOCKING FEATURE
surface_treatmentANODIZE BODY
nominal_thread_size1.312 INCHES ALL ENDS IN
quick_disconnect_methodTWIST-LOCK ALL ENDS
thread_quantity_per_inch12 ALL ENDS
NSN5310-00-052-6900
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 203431 · 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
MATERIAL DOCUMENT AND CLASSIFICATION: ZZ-R-765,CL 3,GR 50 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLE: ROUND
PERIPHERAL SHAPE STYLE: ROUND
HOLE DIAMETER: 0.641 INCHES NOMINAL IN
MATERIAL: RUBBER SYNTHETIC OVERALL
HARDNESS RATING: 50.0 DUROMETER NOMINAL
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
OVERALL DIAMETER: 0.922 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765,CL 3,GR 50 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER0.641 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
HARDNESS RATING50.0 DUROMETER NOMINAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER0.922 INCHES NOMINAL IN
THICKNESS0.063 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
2034-3Interchangeable
interchangeable cross-reference
interchangeable
4564758-1Interchangeable
interchangeable cross-reference
interchangeable
162A375-2Interchangeable
interchangeable cross-reference
interchangeable
1181-201PCG3Interchangeable
interchangeable cross-reference
interchangeable
1182-382PCL3Interchangeable
interchangeable cross-reference
interchangeable
312-4504-981809PC4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 203431?
203431 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 203431?
There are 14 known substitutes for 203431: 2034-3, 4564758-1, 162A375-2 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 203431?
203431 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-052-6900. This indicates validated use in U.S. government and defense supply chains.
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