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404051 — COVER,GUNSIGHT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

404051: COVER,GUNSIGHT.

The COVER,GUNSIGHT is a the manufacturer industrial component. Key specifications include end_item_identification: COVER DUST SCOPE FRONT, part_name_assigned_by_controlling_agency: 1005015882913. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-463-5744, 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
404051
NSN: 5310-00-463-5744
NIINs: 004635744, 012491672, 016128997
FSC: 5310 — Nuts and Washers
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
end_item_identificationCOVER DUST SCOPE FRONT
part_name_assigned_by_controlling_agency1005015882913
NSN5310-00-463-5744
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 404051 · 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 WIDTH ACROSS FLATS: 0.376 INCHES NOMINAL IN
•
NUT LENGTH: 0.143 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.037 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
NUT DIAMETER: 0.222 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE: ROUND W/WRENCH FLATS OVERALL
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS0.376 INCHES NOMINAL IN
NUT LENGTH0.143 INCHES NOMINAL IN
FLANGE THICKNESS0.037 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.190 INCHES IN
NUT DIAMETER0.222 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPEROUND W/WRENCH FLATS OVERALL
NUT STYLESLEEVE
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· 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 404051?
404051 is a COVER,GUNSIGHT.
What is the NSN for 404051?
404051 is cataloged in the U.S. Government catalog under NSN 5310-00-463-5744. 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.