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PartsTable / COMPONENT / 49A3819
49A3819 ✓ 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 NUT,COUPLING,FLEXIBLE CASING is a the manufacturer industrial component. Key specifications include special_features: FSC APPLICATION DATA:GENERATING AND CHARGING PLANT, OXYGEN-NITROGEN, SKID MOUNTED, reference_number_differentiating_characteristics: CLEANED AND PACKAGED PER MIL-P-52211. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-329-8943, 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
49A3819
NSN: 5310-00-329-8943
FSC: 5310
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
special_featuresFSC APPLICATION DATA:GENERATING AND CHARGING PLANT, OXYGEN-NITROGEN, SKID MOUNTED
reference_number_differentiating_characteristicsCLEANED AND PACKAGED PER MIL-P-52211
NSN5310-00-329-8943
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 49A3819 · 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
•
WING SPREAD WIDTH: 3.688 INCHES NOMINAL IN
•
NUT COUNTERBORE DEPTH: 0.250 INCHES NOMINAL NUT IN
•
NOMINAL THREAD SIZE: 1.875 INCHES IN
•
BODY DIAMETER: 2.188 INCHES NOMINAL IN
•
NUT STYLE: WING
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
COUNTERBORE DIAMETER: 1.625 INCHES NOMINAL NUT IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT1.000 INCHES NOMINAL IN
WING SPREAD WIDTH3.688 INCHES NOMINAL IN
NUT COUNTERBORE DEPTH0.250 INCHES NOMINAL NUT IN
NOMINAL THREAD SIZE1.875 INCHES IN
BODY DIAMETER2.188 INCHES NOMINAL IN
NUT STYLEWING
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
COUNTERBORE DIAMETER1.625 INCHES NOMINAL NUT IN
THREAD SERIESUNS
THREAD PITCH DIAMETERS+1.7500 TO 1.7735 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
9219Interchangeable
interchangeable cross-reference
interchangeable
5001563Interchangeable
interchangeable cross-reference
interchangeable
5C643Interchangeable
interchangeable cross-reference
interchangeable
N5332PC5C531Interchangeable
interchangeable cross-reference
interchangeable
643S5CInterchangeable
interchangeable cross-reference
interchangeable
1027Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 49A3819?
49A3819 is a NUT,COUPLING,FLEXIBLE CASING.
What parts can replace 49A3819?
There are 19 known substitutes for 49A3819: 9219, 5001563, 5C643 and 16 more. Substitute compatibility should be verified for your specific system.
Is 49A3819 still available?
49A3819 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026