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PartsTable / COMPONENT / 21-777
21-777 ✓ 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 RESISTOR,FIXED,WIRE WOUND is a the manufacturer industrial component. Key specifications include material: STEEL, overall_height: 0.235 INCHES NOMINAL IN, shank_diameter: 0.380 INCHES NOMINAL IN, flange_diameter: 0.250 INCHES NOMINAL IN, package_model_number: PUROX GT350 DLX 540/300. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-049-2511, 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
21-777
NSN: 4810-01-049-2511
FSC: 4810
CAGE: 16780 — EATON AEROSPACE LLC (USA)
SPECIFICATIONS
materialSTEEL
overall_height0.235 INCHES NOMINAL IN
shank_diameter0.380 INCHES NOMINAL IN
flange_diameter0.250 INCHES NOMINAL IN
component_quantity8
package_model_numberPUROX GT350 DLX 540/300
NSN4810-01-049-2511
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21-777 · 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: 0.250 INCHES NOMINAL IN
•
SHANK DIAMETER: 0.380 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE DIAMETER0.250 INCHES NOMINAL IN
SHANK DIAMETER0.380 INCHES NOMINAL IN
OVERALL HEIGHT0.235 INCHES NOMINAL IN
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
21777Interchangeable
interchangeable cross-reference
interchangeable
19121Interchangeable
interchangeable cross-reference
interchangeable
30209Interchangeable
interchangeable cross-reference
interchangeable
910-4XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-777?
21-777 is a RESISTOR,FIXED,WIRE WOUND.
What parts can replace 21-777?
There are 4 known substitutes for 21-777: 21777, 19121, 30209 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21-777?
21-777 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-049-2511. 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