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Technical Data Sheet
PartsTable / COMPONENT / 26M77-100
26M77-100 ✓ 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 GEAR SET,BEVEL,MATCHED is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.770 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_length: 4.120 INCHES NOMINAL IN, flange_diameter: 4.910 INCHES NOMINAL IN, inside_diameter: 1.218 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-900-2344, 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
26M77-100
NSN: 4820-00-900-2344
FSC: 4820
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.770 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_length4.120 INCHES NOMINAL IN
flange_diameter4.910 INCHES NOMINAL IN
inside_diameter1.218 INCHES MAXIMUM IN
outside_diameter2.880 INCHES MAXIMUM IN
style_designatorTHREADED FLANGED
seat_angle_in_deg30.000 NOMINAL
component_quantity2
nominal_thread_size3.459 INCHES SINGLE THREADED PORTION IN
under_flange_height0.770 INCHES NOMINAL IN
NSN4820-00-900-2344
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 26M77-100 · 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
•
OUTSIDE DIAMETER: 2.798 INCHES MINIMUM AND 2.803 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN
•
INSIDE DIAMETER: 2.065 INCHES MINIMUM AND 2.070 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER2.798 INCHES MINIMUM AND 2.803 INCHES MAXIMUM IN
OVERALL HEIGHT0.162 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
INSIDE DIAMETER2.065 INCHES MINIMUM AND 2.070 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
S1616Interchangeable
interchangeable cross-reference
interchangeable
0S1616Interchangeable
interchangeable cross-reference
interchangeable
6477-32Interchangeable
interchangeable cross-reference
interchangeable
50055Interchangeable
interchangeable cross-reference
interchangeable
26M77-100-PC21Interchangeable
interchangeable cross-reference
interchangeable
845-2445066Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26M77-100?
26M77-100 is a GEAR SET,BEVEL,MATCHED.
What parts can replace 26M77-100?
There are 24 known substitutes for 26M77-100: S1616, 0S1616, 6477-32 and 21 more. Substitute compatibility should be verified for your specific system.
Is 26M77-100 still available?
26M77-100 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