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169258 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

169258: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, seat_radius: 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN, nominal_thread_size: 0.312 INCHES SINGLE THREADED PORTION IN, fsc_application_data: LANDING GEAR,AIRCRAFT. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-522-5973, 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
169258
NSN: 4820-00-522-5973
FSC: 4820 — Valves, Nonpowered
CAGE: 55284 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL DIV AEROSPACE-SOUTH BEND (WESTMOOR ST) (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
seat_radius0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
thread_class3A SINGLE THREADED PORTION A
thread_length0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN
nominal_thread_size0.312 INCHES SINGLE THREADED PORTION IN
fsc_application_dataLANDING GEAR,AIRCRAFT
seating_surface_shapeRADIAL
thread_quantity_per_inch24 SINGLE THREADED PORTION
thread_series_designatorUNF SINGLE THREADED PORTION
material_document_and_classificationAMS 6370SJGASAE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4820-00-522-5973
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 169258 · 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
•
FSC APPLICATION DATA: LANDING GEAR,AIRCRAFT
•
THREAD LENGTH: 0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6370SJGASAE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.312 INCHES SINGLE THREADED PORTION IN
•
SEAT RADIUS: 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
THREAD QUANTITY PER INCH: 24 SINGLE THREADED PORTION
•
MATERIAL: STEEL COMP 4130 OVERALL
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATALANDING GEAR,AIRCRAFT
THREAD LENGTH0.172 INCHES MINIMUM AND 0.187 INCHES MAXIMUM SINGLE THREADED PORTION IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6370SJGASAE 4130 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.312 INCHES SINGLE THREADED PORTION IN
SEAT RADIUS0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH24 SINGLE THREADED PORTION
MATERIALSTEEL COMP 4130 OVERALL
THREAD SERIES DESIGNATORUNF SINGLE THREADED PORTION
SEATING SURFACE SHAPERADIAL
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 169258?
169258 is a SEAT,VALVE.
What is the NSN for 169258?
169258 is cataloged in the U.S. Government catalog under NSN 4820-00-522-5973. This indicates validated use in U.S. government and defense supply chains.
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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.