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521111 — FILTER,RADIO FREQUENCY INTERFERE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

521111: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL COMP 8630 OVERALL, nut_style: SLEEVE, nut_length: 0.345 INCHES NOMINAL IN, nut_diameter: 0.440 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-326-6819, 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
MRO→ MRO_GENERAL→ 521111
NSN: 5310-00-326-6819
NIINs: 003266819, 011614386, 013948211, 016960400
FSC: 5310 — Nuts and Washers
CAGE: 03104 — TELEDYNE BROWN ENGINEERING, INC. DBA TELEDYNE TURBINE ENGINES DIV TELEDYNE TURBINE ENGINES (USA)
SPECIFICATIONS
materialSTEEL COMP 8630 OVERALL
nut_styleSLEEVE
nut_length0.345 INCHES NOMINAL IN
nut_diameter0.440 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
flange_diameter1.060 INCHES NOMINAL IN
flange_thickness0.032 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_size0.312 INCHES IN
cross-sectional_shapeROUND NUT
end_item_identificationAIRCRAFT MODEL F-18
NSN5310-00-326-6819
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 521111 · 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
•
FLANGE DIAMETER: 1.060 INCHES NOMINAL IN
•
NUT LENGTH: 0.345 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.032 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6280 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NUT DIAMETER: 0.440 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER1.060 INCHES NOMINAL IN
NUT LENGTH0.345 INCHES NOMINAL IN
FLANGE THICKNESS0.032 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6280 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
NUT DIAMETER0.440 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPEROUND FLANGE
CROSS-SECTIONAL SHAPEROUND NUT
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 521111?
521111 is a FILTER,RADIO FREQUENCY INTERFERE. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 521111?
521111 is cataloged in the U.S. Government catalog under NSN 5310-00-326-6819. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.