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920A 20 — VALVE,REGULATING,FLUID PRESSURE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

920A 20: VALVE,REGULATING,FLUID PRESSURE.

VALVE,REGULATING,FLUID PRESSURE. Key specifications include material: STEEL OVERALL, overall_length: 42.0 MILLIMETERS MAXIMUM MM, drive_end_shape: SQUARE SINGLE END INTERNAL, style_designator: INTERNAL-INTERNAL, features_provided: MANUAL TOOL, surface_treatment: CHROMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-441-1639, 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
920A 20
NSN: 4820-00-441-1639
NIINs: 004411639, 011128324
FSC: 4820 — Valves, Nonpowered
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length42.0 MILLIMETERS MAXIMUM MM
drive_end_shapeSQUARE SINGLE END INTERNAL
style_designatorINTERNAL-INTERNAL
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.500 INCHES NOMINAL SINGLE END IN
wrenching_surface_size20.0 MILLIMETERS NOMINAL SINGLE END MM
wrenching_surface_shape6 POINT SINGLE END INTERNAL
drive_end_outside_diameter27.9 MILLIMETERS MAXIMUM MM
nondefinitive_spec/std_data1 TYPE AND 1 CLASS
specification/standard_data05047-ASME B107.5 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4820-00-441-1639
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 920A 20 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONVALVES,NONPOWERED
SUBSTITUTES & CROSS-REFERENCES 4
3R49180Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5562F4YSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4820PL0633125Reference document
Same NSN cross-reference
Reference document — Informative reference only
5562F4ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 920A 20?
920A 20 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 920A 20?
There are 4 known substitutes for 920A 20: 3R49180, 5562F4Y, 4820PL0633125 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 920A 20?
920A 20 is cataloged in the U.S. Government catalog under NSN 4820-00-441-1639. 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.