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1624L — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1624L: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416 OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 1.750 INCHES NOMINAL IN, style_designator: THREADED FLANGED, seat_angle_in_deg: 58.000 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-657-1522, 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
1624L
NSN: 4820-00-657-1522
FSC: 4820 — Valves, Nonpowered
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter1.750 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
seat_angle_in_deg58.000 NOMINAL
nominal_thread_size1.500 INCHES SINGLE THREADED PORTION IN
under_flange_height0.375 INCHES NOMINAL IN
body_inside_diameter0.879 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
thread_series_designatorUNEF SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.375 INCHES NOMINAL IN
NSN4820-00-657-1522
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1624L · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.375 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
BODY INSIDE DIAMETER: 0.879 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 1.500 INCHES SINGLE THREADED PORTION IN
•
UNDER FLANGE HEIGHT: 0.375 INCHES NOMINAL IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.375 INCHES NOMINAL IN
FLANGE DIAMETER1.750 INCHES NOMINAL IN
THREAD LENGTH0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORTHREADED FLANGED
BODY INSIDE DIAMETER0.879 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
NOMINAL THREAD SIZE1.500 INCHES SINGLE THREADED PORTION IN
UNDER FLANGE HEIGHT0.375 INCHES NOMINAL IN
THREAD CLASS2A SINGLE THREADED PORTION A
MATERIALSTEEL COMP 416 OVERALL
SEAT ANGLE IN DEG58.000 NOMINAL
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
1624Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1624L?
1624L is a SEAT,VALVE.
What parts can replace 1624L?
There is 1 known substitute for 1624L: 1624. Substitute compatibility should be verified for your specific system.
What is the NSN for 1624L?
1624L is cataloged in the U.S. Government catalog under NSN 4820-00-657-1522. 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.