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HBHSP1518 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

HBHSP1518: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.625 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 7.000 INCHES NOMINAL IN, style_designator: THREADED FLANGED, nominal_thread_size: 6.594 INCHES SINGLE THREADED PORTION IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-952-4780, 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
HBHSP1518
NSN: 4820-00-952-4780
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.625 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter7.000 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size6.594 INCHES SINGLE THREADED PORTION IN
under_flange_height0.625 INCHES NOMINAL IN
body_inside_diameter5.938 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.312 INCHES NOMINAL IN
NSN4820-00-952-4780
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: HBHSP1518 · 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: 0.312 INCHES NOMINAL IN
•
FLANGE DIAMETER: 7.000 INCHES NOMINAL IN
•
THREAD LENGTH: 0.625 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
BODY INSIDE DIAMETER: 5.938 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 6.594 INCHES SINGLE THREADED PORTION IN
•
UNDER FLANGE HEIGHT: 0.625 INCHES NOMINAL IN
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.312 INCHES NOMINAL IN
FLANGE DIAMETER7.000 INCHES NOMINAL IN
THREAD LENGTH0.625 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORTHREADED FLANGED
BODY INSIDE DIAMETER5.938 INCHES NOMINAL IN
NOMINAL THREAD SIZE6.594 INCHES SINGLE THREADED PORTION IN
UNDER FLANGE HEIGHT0.625 INCHES NOMINAL IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
803-1385637-06-08Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
803-1385637-06-04Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S4824-1385637PC8-6INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
X5488Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5000S4824-1385637PC8-6INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
803-1385637-06X-08Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HBHSP1518?
HBHSP1518 is a SEAT,VALVE.
What parts can replace HBHSP1518?
There are 6 known substitutes for HBHSP1518: 803-1385637-06-08, 803-1385637-06-04, S4824-1385637PC8-6IN and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HBHSP1518?
HBHSP1518 is cataloged in the U.S. Government catalog under NSN 4820-00-952-4780. 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.