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21809-001 — VALVE,LINEAR,DIRECTIONAL CONTROL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

21809-001: VALVE,LINEAR,DIRECTIONAL CONTROL.

VALVE,LINEAR,DIRECTIONAL CONTROL. Key specifications include phase: SINGLE, material: RUBBER AND PLASTIC TETRAFLUOROETHYLENE OVERALL, flange_width: 2.250 INCHES IN, body_material: ALUMINUM ALLOY, flange_length: 2.250 INCHES IN, connection_type: FLANGE, RECTANGULAR W/HOLES AND FLANGE, ROUND W/O HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-363-9104, 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
21809-001
NSN: 5310-01-363-9104
NIINs: 013639104, 014885501, 014944016
FSC: 5310 — Nuts and Washers
CAGE: 33604 — EXCELITAS TECHNOLOGIES CORP (USA)
SPECIFICATIONS
phaseSINGLE
materialRUBBER AND PLASTIC TETRAFLUOROETHYLENE OVERALL
flange_width2.250 INCHES IN
body_materialALUMINUM ALLOY
flange_length2.250 INCHES IN
connection_typeFLANGE, RECTANGULAR W/HOLES AND FLANGE, ROUND W/O HOLES
flange_diameter2.250 INCHES IN
special_featuresDRAWING)VALVE ASSY,SZ SPCL;(INAVY)VALVE ASSY, SZ SPCL
features_providedSIDE PORTED
bolt_hole_quantity12
flange_face_designRAISED
frequency_in_hertz0.0 AND 400.0
NSN5310-01-363-9104
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21809-001 · 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
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21809-001?
21809-001 is a VALVE,LINEAR,DIRECTIONAL CONTROL.
What is the NSN for 21809-001?
21809-001 is cataloged in the U.S. Government catalog under NSN 5310-01-363-9104. 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.