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056624 ITEM 21 — Technical Data Sheet

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— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

COVER,ELECTRONIC COMMUNICATION E. Key specifications include material: STEEL CORROSION RESISTING SEAT, flange_diameter: 4.890 INCHES NOMINAL IN, style_designator: THREADED FLANGED, under_flange_height: 1.750 INCHES NOMINAL IN, body_inside_diameter: 0.763 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN, seating_surface_shape: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-01-216-4095, 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
056624 ITEM 21
NSN: 4820-01-216-4095
FSC: 4820
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING SEAT
flange_diameter4.890 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
under_flange_height1.750 INCHES NOMINAL IN
body_inside_diameter0.763 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN
seating_surface_shapeFLAT
flange_seat_to_disk_end_height0.281 INCHES NOMINAL IN
NSN4820-01-216-4095
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 056624 ITEM 21 · 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
•
SEATING SURFACE SHAPE: FLAT
•
BODY INSIDE DIAMETER: 0.763 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN
•
UNDER FLANGE HEIGHT: 1.750 INCHES NOMINAL IN
•
FLANGE DIAMETER: 4.890 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING SEAT
•
STYLE DESIGNATOR: THREADED FLANGED
•
FLANGE SEAT TO DISK END HEIGHT: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SEATING SURFACE SHAPEFLAT
BODY INSIDE DIAMETER0.763 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN
UNDER FLANGE HEIGHT1.750 INCHES NOMINAL IN
FLANGE DIAMETER4.890 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING SEAT
STYLE DESIGNATORTHREADED FLANGED
FLANGE SEAT TO DISK END HEIGHT0.281 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
16974InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
056624InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1531WE 4IN AND 056624InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
056624 ITEM 7InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
077254InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
105266InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 056624 ITEM 21?
056624 ITEM 21 is a COVER,ELECTRONIC COMMUNICATION E.
What parts can replace 056624 ITEM 21?
There are 12 known substitutes for 056624 ITEM 21: 16974, 056624, 1531WE 4IN AND 056624 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 056624 ITEM 21?
056624 ITEM 21 is cataloged in the Federal Logistics Information System under NSN 4820-01-216-4095. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026