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Technical Data Sheet
PartsTable / COMPONENT / 20-05658
20-05658 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER BUNA N OVERALL, overall_height: 0.375 INCHES NOMINAL IN, hardness_rating: 90.0 BRINELL STANDARD MINIMUM AND 95.0 BRINELL STANDARD MAXIMUM FACE, style_designator: PLAIN, seat_angle_in_deg: 45.000 NOMINAL, body_inside_diameter: 1.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-451-8015, 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
20-05658
NSN: 4820-00-451-8015
FSC: 4820
CAGE: 03670 — TYCO FIRE PRODUCTS LP (USA)
SPECIFICATIONS
materialRUBBER BUNA N OVERALL
overall_height0.375 INCHES NOMINAL IN
hardness_rating90.0 BRINELL STANDARD MINIMUM AND 95.0 BRINELL STANDARD MAXIMUM FACE
style_designatorPLAIN
seat_angle_in_deg45.000 NOMINAL
body_inside_diameter1.500 INCHES NOMINAL IN
body_outside_diameter2.251 INCHES MINIMUM AND 2.257 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
NSN4820-00-451-8015
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20-05658 · 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
•
SEATING SURFACE SHAPE: ANGULAR
•
HARDNESS RATING: 90.0 BRINELL STANDARD MINIMUM AND 95.0 BRINELL STANDARD MAXIMUM FACE
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
BODY OUTSIDE DIAMETER: 2.251 INCHES MINIMUM AND 2.257 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUNA N OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SEATING SURFACE SHAPEANGULAR
HARDNESS RATING90.0 BRINELL STANDARD MINIMUM AND 95.0 BRINELL STANDARD MAXIMUM FACE
HARDNESS RATING90.0 BRINELL STANDARD MINIMUM AND 95.0 BRINELL STANDARD MAXIMUM BODY
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER1.500 INCHES NOMINAL IN
SEAT ANGLE IN DEG45.000 NOMINAL
BODY OUTSIDE DIAMETER2.251 INCHES MINIMUM AND 2.257 INCHES MAXIMUM IN
MATERIALRUBBER BUNA N OVERALL
OVERALL HEIGHT0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
112966AInterchangeable
interchangeable cross-reference
interchangeable
17T601Interchangeable
interchangeable cross-reference
interchangeable
305MInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-05658?
20-05658 is a SEAT,VALVE.
What parts can replace 20-05658?
There are 3 known substitutes for 20-05658: 112966A, 17T601, 305M. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-05658?
20-05658 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-451-8015. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026