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71556 PIECE 16 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

71556 PIECE 16: 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: 0.340 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.188 INCHES NOMINAL IN, style_designator: FAUCET, seat_angle_in_deg: 45.000 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-074-2017, 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
71556 PIECE 16
NSN: 4820-01-074-2017
FSC: 4820 — Valves, Nonpowered
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.340 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.188 INCHES NOMINAL IN
style_designatorFAUCET
seat_angle_in_deg45.000 NOMINAL
nominal_thread_size1.188 INCHES SINGLE THREADED PORTION IN
body_inside_diameter0.848 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch20 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-01-074-2017
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 71556 PIECE 16 · 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
•
THREAD LENGTH: 0.340 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: FAUCET
•
BODY INSIDE DIAMETER: 0.848 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 1.188 INCHES SINGLE THREADED PORTION IN
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
THREAD QUANTITY PER INCH: 20 SINGLE THREADED PORTION
•
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.188 INCHES NOMINAL IN
THREAD LENGTH0.340 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORFAUCET
BODY INSIDE DIAMETER0.848 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.188 INCHES SINGLE THREADED PORTION IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH20 SINGLE THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
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

No substitute or cross-reference records for this part.

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 71556 PIECE 16?
71556 PIECE 16 is a SEAT,VALVE.
What is the NSN for 71556 PIECE 16?
71556 PIECE 16 is cataloged in the U.S. Government catalog under NSN 4820-01-074-2017. 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.