PartsTable
Technical Data Sheet
4209 ✓ Verified by PartsTable
Melissa & Doug · 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include color: WHITE OVERALL, length: 0.625 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, nut_style: ROUND, bore_shape: STRAIGHT, nut_height: 0.656 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 5310-00-021-8197, 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
4209
NSN: 5310-00-021-8197
FSC: 5310
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
colorWHITE OVERALL
length0.625 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
nut_styleROUND
bore_shapeSTRAIGHT
nut_height0.656 INCHES NOMINAL IN
shaft_typeROUND, SLOTTED, FLATTED SINGLE ACTUATOR
flat_height0.198 INCHES MINIMUM AND 0.201 INCHES MAXIMUM SINGLE ACTUATOR IN
garment_sizeLARGE
nut_diameter2.043 INCHES MINIMUM AND 2.073 INCHES MAXIMUM IN
shaft_length0.437 INCHES NOMINAL SINGLE ACTUATOR IN
thread_class2A SINGLE MOUNTING FACILITY A
NSN5310-00-021-8197
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4209 · Melissa & Doug ⚠ 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
WIDTH ACROSS FLATS: 1.125 INCHES NOMINAL IN
THREAD DIRECTION: RIGHT-HAND
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.750 INCHES IN
BEARING SURFACE TYPE: WASHER FACED
THREAD QUANTITY PER INCH: 16
NUT HEIGHT: 0.656 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS1.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIESUNF
NOMINAL THREAD SIZE0.750 INCHES IN
BEARING SURFACE TYPEWASHER FACED
THREAD QUANTITY PER INCH16
NUT HEIGHT0.656 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
G5928PC41Interchangeable
interchangeable cross-reference
interchangeable
G9661PC41Interchangeable
interchangeable cross-reference
interchangeable
929039Interchangeable
interchangeable cross-reference
interchangeable
4209Interchangeable
interchangeable cross-reference
interchangeable
2804H169Interchangeable
interchangeable cross-reference
interchangeable
9001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4209?
4209 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Melissa & Doug.
What parts can replace 4209?
There are 24 known substitutes for 4209: G5928PC41, G9661PC41, 929039 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4209?
4209 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-8197. This indicates validated use in U.S. government and defense supply chains.
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