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Technical Data Sheet
PartsTable / COMPONENT / 403508
403508 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include height: 1.766 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN, flange_width: 1.734 INCHES MINIMUM AND 1.766 INCHES MAXIMUM IN, flange_length: 1.734 INCHES MINIMUM AND 1.766 INCHES MAXIMUM IN, inside_diameter: 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN, flange_thickness: 0.115 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, style_designator: ROUND FOUR-HOLE FLANGE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-529-3225, 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
403508
NSN: 4820-00-529-3225
FSC: 4820
CAGE: 77068 — ALLIED-SIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO ELECTRODYNAMICS DIV (USA)
SPECIFICATIONS
height1.766 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN
flange_width1.734 INCHES MINIMUM AND 1.766 INCHES MAXIMUM IN
flange_length1.734 INCHES MINIMUM AND 1.766 INCHES MAXIMUM IN
inside_diameter0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
flange_thickness0.115 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
style_designatorROUND FOUR-HOLE FLANGE
distance_from_flange_to_end0.797 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
flange_mounting_hole_diameter0.158 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
distance_between_mounting_hole_centers1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
static_load_rating_at_specified_deflection8.5 POUND LOAD RATING AT 0.015 INCH DEFLECTION LBS
shortest_distance_between_mounting_hole_centers1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
NSN4820-00-529-3225
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 403508 · 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
•
MAXIMUM OPERATING TEMP: 160.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: STEEL FLOW CONTROL DEVICE
•
NONDEFINITIVE SPEC/STD DATA: 1500 CLASS AND A STYLE
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
•
MEDIA FOR WHICH DESIGNED: HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MAXIMUM OPERATING TEMP160.0 FAHRENHEIT SINGLE RESPONSE DEGF
SURFACE TREATMENTANODIZE
MATERIALSTEEL FLOW CONTROL DEVICE
NONDEFINITIVE SPEC/STD DATA1500 CLASS AND A STYLE
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE
MATERIALALUMINUM ALLOY BODY
STYLE DESIGNATORSTRAIGHT THRU
OPERATING PRESSURE1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
403508Interchangeable
interchangeable cross-reference
interchangeable
265720Interchangeable
interchangeable cross-reference
interchangeable
1112-526070Interchangeable
Same NIIN cross-reference
interchangeable
1-3146-75Interchangeable
Same NIIN cross-reference
interchangeable
MIL-V-5524Interchangeable
Same NIIN cross-reference
interchangeable
AN6207-5Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 403508?
403508 is a VALVE,CHECK.
What parts can replace 403508?
There are 6 known substitutes for 403508: 403508, 265720, 1112-526070 and 3 more. Substitute compatibility should be verified for your specific system.
Is 403508 still available?
403508 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026