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721-8217289-5 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

721-8217289-5: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, nut_style: HEXAGON, nut_height: 3.500 INCHES NOMINAL IN, thread_class: 0.375-16UNC-28, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-593-7295, 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
721-8217289-5
NSN: 5310-01-593-7295
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
nut_styleHEXAGON
nut_height3.500 INCHES NOMINAL IN
thread_class0.375-16UNC-28
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
width_across_flats5.250 INCHES NOMINAL IN
nominal_thread_size3.750 INCHES IN
bearing_surface_typeFLAT
end_item_identificationPAYLOAD TUBE MUZZLE HATCH OPERATOR
thread_quantity_per_inch16
material_document_and_classificationASTM-B150 ALY-UNSC63200 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-593-7295
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 721-8217289-5 · 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
•
WIDTH ACROSS FLATS: 5.250 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-B150 ALY-UNSC63200 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 3.750 INCHES IN
•
NUT HEIGHT: 3.500 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 0.375-16UNC-28
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS5.250 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-B150 ALY-UNSC63200 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE3.750 INCHES IN
NUT HEIGHT3.500 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD CLASS0.375-16UNC-28
END ITEM IDENTIFICATIONPAYLOAD TUBE MUZZLE HATCH OPERATOR
THREAD QUANTITY PER INCH16
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
H861-6110-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 721-8217289-5?
721-8217289-5 is a NUT,PLAIN,HEXAGON.
What parts can replace 721-8217289-5?
There is 1 known substitute for 721-8217289-5: H861-6110-5. Substitute compatibility should be verified for your specific system.
What is the NSN for 721-8217289-5?
721-8217289-5 is cataloged in the U.S. Government catalog under NSN 5310-01-593-7295. This indicates validated use in U.S. government and defense supply chains.
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