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4-10521 — FILTER ELEMENT,FLUID

✓ Government record, cited
Legrand · NUT WASHER
PRODUCT OVERVIEW

4-10521: FILTER ELEMENT,FLUID.

Conform to IEC 61009-1, IEC 62423 (F type) Voltage independent tripping except Cat.No 4 106 57/58/59 AC type : detect AC components faults A type : detect AC and DC component faults F type (High immunity) : detect faults with AC and DC components, increased immunity to false tripping Detection of high frequency fault currents For mounting on the right-hand side of 1 module per pole DX³ MCBs This part is cataloged in the U.S. Government catalog under NSN 5310-00-637-0836, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
4-10521
NSN: 5310-00-637-0836
NIINs: 006370836, 012892420
FSC: 5310 — Nuts and Washers
CAGE: 88807 — NEAC COMPRESSOR SERVICE USA INC (USA)
SPECIFICATIONS
style_designatorCYLINDRICAL W/OUT CONTAINER
filtering_media_designMESH SINGLE FILTERING MEDIA RESPONSE
NSN5310-00-637-0836
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4-10521 · 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: 1.062 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
NUT HEIGHT: 1.375 INCHES NOMINAL IN
•
NUT STYLE: CAP
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 11
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.062 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.625 INCHES IN
NUT HEIGHT1.375 INCHES NOMINAL IN
NUT STYLECAP
THREAD CLASS2B
THREAD QUANTITY PER INCH11
MATERIALSTEEL OVERALL
BEARING SURFACE TYPEWASHER FACED
SUBSTITUTES & CROSS-REFERENCES 2
9-585-01-0026Reference document
Same NSN cross-reference
Reference document — Secondary reference
4-1521Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4-10521?
4-10521 is a FILTER ELEMENT,FLUID manufactured by Legrand.
What parts can replace 4-10521?
There are 2 known substitutes for 4-10521: 9-585-01-0026, 4-1521. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-10521?
4-10521 is cataloged in the U.S. Government catalog under NSN 5310-00-637-0836. 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.