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530561 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.250 INCHES NOMINAL IN, outside_diameter: 3.066 INCHES NOMINAL IN, surface_treatment: PLASTIC CASE, housing_bore_diameter: 3.061 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-157-1177, 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
530561
NSN: 5315-00-157-1177
FSC: 5315
CAGE: 06987 — FL AEROSPACE CORP JANITROL AERO DIV/GENERAL DESIGN (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.250 INCHES NOMINAL IN
outside_diameter3.066 INCHES NOMINAL IN
surface_treatmentPLASTIC CASE
housing_bore_diameter3.061 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter2.125 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5315-00-157-1177
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 530561 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
504952Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
P9-10-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 530561?
530561 is a SEAL,PLAIN ENCASED.
What parts can replace 530561?
There are 3 known substitutes for 530561: 504952, 00044, P9-10-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 530561?
530561 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-157-1177. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026