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177-948021 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

177-948021: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, mounting_facility: THREADED FASTENER, mounting_position: HORIZONTAL, surface_treatment: ANODIZE, disk_loading_method: SPRING, flow_control_device: DISK. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-328-2637, 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
177-948021
NSN: 4820-00-328-2637
FSC: 4820 — Valves, Nonpowered
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
mounting_facilityTHREADED FASTENER
mounting_positionHORIZONTAL
surface_treatmentANODIZE
disk_loading_methodSPRING
flow_control_deviceDISK
valve_operation_methodAUTOMATIC
NSN4820-00-328-2637
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 177-948021 · 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
KEY FEATURES
•
FLOW CONTROL DEVICE: DISK
•
MOUNTING POSITION: HORIZONTAL
•
DISK LOADING METHOD: SPRING
•
MOUNTING FACILITY: THREADED FASTENER
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: STEEL CORROSION RESISTING FLOW CONTROL DEVICE
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
MOUNTING POSITIONHORIZONTAL
DISK LOADING METHODSPRING
MOUNTING FACILITYTHREADED FASTENER
SURFACE TREATMENTANODIZE
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
MATERIALALUMINUM ALLOY BODY
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 2
52SP5000Reference document
Same NSN cross-reference
Reference document — Secondary reference
1111-526149Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 177-948021?
177-948021 is a VALVE,CHECK.
What parts can replace 177-948021?
There are 2 known substitutes for 177-948021: 52SP5000, 1111-526149. Substitute compatibility should be verified for your specific system.
What is the NSN for 177-948021?
177-948021 is cataloged in the U.S. Government catalog under NSN 4820-00-328-2637. 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.