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2721781 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2721781: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: ROUND, nut_diameter: 0.870 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.415 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-022-0329, 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
2721781
NSN: 5310-01-022-0329
FSC: 5310 — Nuts and Washers
CAGE: 3H889 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleROUND
nut_diameter0.870 INCHES NOMINAL IN
thread_class3B
nut_thickness0.415 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.604 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES IN
thread_quantity_per_inch20
material_document_and_classificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-022-0329
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2721781 · 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: 0.604 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ES-F59-2,FSCM 92003 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT DIAMETER: 0.870 INCHES NOMINAL IN
•
NUT THICKNESS: 0.415 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.604 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONES-F59-2,FSCM 92003 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NUT DIAMETER0.870 INCHES NOMINAL IN
NUT THICKNESS0.415 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLEROUND
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2721781?
2721781 is a NUT,PLAIN,ROUND.
What is the NSN for 2721781?
2721781 is cataloged in the U.S. Government catalog under NSN 5310-01-022-0329. This indicates validated use in U.S. government and defense supply chains.
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