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21506N — VALVE,DIAPHRAGM,STOP

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21506N: VALVE,DIAPHRAGM,STOP.

The VALVE,DIAPHRAGM,STOP is a the manufacturer industrial component. Key specifications include outside_diameter: 1.438 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.938 INCHES NOMINAL IN, cross-sectional_thickness: 0.175 INCHES NOMINAL IN, cross-sectional_shape_style: METAL WINDING W/ SOFT FILLER. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-926-1923, 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
21506N
NSN: 5330-00-926-1923
NIINs: 009261923, 014591667
FSC: 5330 — Packing and Gasket Materials
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
outside_diameter1.438 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.938 INCHES NOMINAL IN
cross-sectional_thickness0.175 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WINDING W/ SOFT FILLER
NSN5330-00-926-1923
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21506N MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL THICKNESS: 0.175 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL WINDING W/ SOFT FILLER
•
OUTSIDE DIAMETER: 1.438 INCHES NOMINAL IN
•
APERTURE DIAMETER: 0.938 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.175 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL WINDING W/ SOFT FILLER
OUTSIDE DIAMETER1.438 INCHES NOMINAL IN
APERTURE DIAMETER0.938 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 9
24970Reference document
Same NSN cross-reference
Reference document — Secondary reference
23649NPC12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
23649NP312Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
23811NPC15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
14828NPC2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
23710NPC12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
HAZMAT per U.S. Government catalogNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21506N?
21506N is a VALVE,DIAPHRAGM,STOP.
What parts can replace 21506N?
There are 9 known substitutes for 21506N: 24970, 23649NPC12, 23649NP312 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21506N?
21506N is cataloged in the U.S. Government catalog under NSN 5330-00-926-1923. 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.