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H1129PC165 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

H1129PC165: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL BODY, seat_radius: 0.125 INCHES NOMINAL IN, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.812 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 2.585 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN, hardness_rating: 387.0 BRINELL STANDARD NOMINAL BODY. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-301-4983, 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
H1129PC165
NSN: 4820-00-301-4983
FSC: 4820 — Valves, Nonpowered
CAGE: 16712 — SIEMENS ENERGY, INC. (USA)
SPECIFICATIONS
materialSTEEL BODY
seat_radius0.125 INCHES NOMINAL IN
thread_class3A SINGLE THREADED PORTION A
thread_length0.812 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter2.585 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN
hardness_rating387.0 BRINELL STANDARD NOMINAL BODY
style_designatorTHREADED FLANGED
nominal_thread_size2.000 INCHES SINGLE THREADED PORTION IN
seating_surface_shapeRADIAL
thread_quantity_per_inch8 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
material_document_and_classificationMIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
NSN4820-00-301-4983
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: H1129PC165 · 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 DIAMETER: 2.585 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.812 INCHES NOMINAL SINGLE THREADED PORTION IN
•
HARDNESS RATING: 387.0 BRINELL STANDARD NOMINAL BODY
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL THREAD SIZE: 2.000 INCHES SINGLE THREADED PORTION IN
•
SEAT RADIUS: 0.125 INCHES NOMINAL IN
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER2.585 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN
THREAD LENGTH0.812 INCHES NOMINAL SINGLE THREADED PORTION IN
HARDNESS RATING387.0 BRINELL STANDARD NOMINAL BODY
STYLE DESIGNATORTHREADED FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
NOMINAL THREAD SIZE2.000 INCHES SINGLE THREADED PORTION IN
SEAT RADIUS0.125 INCHES NOMINAL IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH8 SINGLE THREADED PORTION
MATERIALSTEEL BODY
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
H3230200PC165Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 H1129PC165?
H1129PC165 is a SEAT,VALVE.
What parts can replace H1129PC165?
There is 1 known substitute for H1129PC165: H3230200PC165. Substitute compatibility should be verified for your specific system.
What is the NSN for H1129PC165?
H1129PC165 is cataloged in the U.S. Government catalog under NSN 4820-00-301-4983. 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.