PartsTable
Technical Data Sheet
Download PDF

310521 — FILTER,RADIO FREQUENCY INTERFERE

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

310521: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL CORROSION RESISTING, nut_style: CAP, nut_height: 1.250 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), inclosure_type: ENCASED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-637-0834, 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→ 310521
NSN: 5310-00-637-0834
NIINs: 006370834, 010923950, 012443599, 014806347, 016169246
FSC: 5310 — Nuts and Washers
CAGE: 11976 — CHICAGO PNEUMATIC TOOL CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
nut_styleCAP
nut_height1.250 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
inclosure_typeENCASED
thread_directionRIGHT-HAND
width_across_flats0.875 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeWASHER FACED
end_item_identificationGRUNDFOS CORP SERIES C CENTRIFUGAL PUMP
thread_quantity_per_inch13
NSN5310-00-637-0834
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 310521 · Legrand ⚠ 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: 0.875 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT HEIGHT: 1.250 INCHES NOMINAL IN
•
NUT STYLE: CAP
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 13
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.875 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NUT HEIGHT1.250 INCHES NOMINAL IN
NUT STYLECAP
THREAD CLASS2B
THREAD QUANTITY PER INCH13
MATERIALSTEEL OVERALL
BEARING SURFACE TYPEWASHER FACED
SUBSTITUTES & CROSS-REFERENCES 1
9-584-01-0007Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 310521?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 310521?
310521 is a FILTER,RADIO FREQUENCY INTERFERE manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).
What parts can replace 310521?
There is 1 known substitute for 310521: 9-584-01-0007. Substitute compatibility should be verified for your specific system.
What is the NSN for 310521?
310521 is cataloged in the U.S. Government catalog under NSN 5310-00-637-0834. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 310521

✓ 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.