PartsTable
Technical Data Sheet
Download PDF

803-1385637-05X — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

803-1385637-05X: 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: 0.562 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 5.875 INCHES NOMINAL IN, style_designator: THREADED FLANGED, nominal_thread_size: 5.562 INCHES SINGLE THREADED PORTION IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-956-8628, 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
803-1385637-05X
NSN: 4820-00-956-8628
FSC: 4820 — Valves, Nonpowered
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.562 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter5.875 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size5.562 INCHES SINGLE THREADED PORTION IN
under_flange_height0.562 INCHES NOMINAL IN
body_inside_diameter4.938 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.281 INCHES NOMINAL IN
NSN4820-00-956-8628
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 803-1385637-05X · 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: 0.281 INCHES NOMINAL IN
•
FLANGE DIAMETER: 5.875 INCHES NOMINAL IN
•
THREAD LENGTH: 0.562 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-288 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 4.938 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 5.562 INCHES SINGLE THREADED PORTION IN
•
UNDER FLANGE HEIGHT: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.281 INCHES NOMINAL IN
FLANGE DIAMETER5.875 INCHES NOMINAL IN
THREAD LENGTH0.562 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORTHREADED FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-288 FED STD SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER4.938 INCHES NOMINAL IN
NOMINAL THREAD SIZE5.562 INCHES SINGLE THREADED PORTION IN
UNDER FLANGE HEIGHT0.562 INCHES NOMINAL IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
SUBSTITUTES & CROSS-REFERENCES 4
5000S4824-1385637-8-5INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
810-1385637-5-08Reference document
Same NSN cross-reference
Reference document — Secondary reference
810-1385637PIECE8-5INCHReference document
Same NSN cross-reference
Reference document — Secondary reference
HBHSP1516Same 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
Ready to buy 803-1385637-05X?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 803-1385637-05X?
803-1385637-05X is a SEAT,VALVE.
What parts can replace 803-1385637-05X?
There are 4 known substitutes for 803-1385637-05X: 5000S4824-1385637-8-5IN, 810-1385637-5-08, 810-1385637PIECE8-5INCH and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 803-1385637-05X?
803-1385637-05X is cataloged in the U.S. Government catalog under NSN 4820-00-956-8628. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 803-1385637-05X

✓ 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.