PartsTable
Technical Data Sheet
21270-11 ✓ 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 VALVE,CHECK is a the manufacturer industrial component. Key specifications include special_features: THIS CHECK VALVE IS PART OF A MANIFOLD VALVE ASSEMBLY WHICH ALSO INCLUDES A RESTRICTOR VALVE; MEDIA IS HYDRAULIC FLUID, mounting_position: HORIZONTAL OR VERTICAL, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, end_item_identification: NHA 4820-01-503-2497 RESTRICTOR MANIFOLD VALVE ASSY; SEAWOLF CLASS SSN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-326-5520, 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
21270-11
NSN: 5310-01-326-5520
FSC: 5310
CAGE: 97947 — LISTER PETTER AMERICAS INCORPORATED (USA)
SPECIFICATIONS
special_featuresTHIS CHECK VALVE IS PART OF A MANIFOLD VALVE ASSEMBLY WHICH ALSO INCLUDES A RESTRICTOR VALVE; MEDIA IS HYDRAULIC FLUID
mounting_positionHORIZONTAL OR VERTICAL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
end_item_identificationNHA 4820-01-503-2497 RESTRICTOR MANIFOLD VALVE ASSY; SEAWOLF CLASS SSN
NSN5310-01-326-5520
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21270-11 · 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
21249 FIND 40Interchangeable
interchangeable cross-reference
interchangeable
21270Interchangeable
interchangeable cross-reference
interchangeable
09-21243-1-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21270-11?
21270-11 is a VALVE,CHECK.
What parts can replace 21270-11?
There are 3 known substitutes for 21270-11: 21249 FIND 40, 21270, 09-21243-1-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 21270-11?
21270-11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-326-5520. This indicates validated use in U.S. government and defense supply chains.
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