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MC12959-1 — VALVE,LINEAR,DIRECTIONAL CONTROL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

MC12959-1: VALVE,LINEAR,DIRECTIONAL CONTROL.

VALVE,LINEAR,DIRECTIONAL CONTROL. Key specifications include end_item_identification: A7K ACFT, reference_number_differentiating_characteristics: AS DIFFERENTIATED BY THE SOURCE CONTROL DWG NO.. This part is cataloged in the U.S.

Government catalog under NSN 4810-01-133-9938, 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
MC12959-1
NSN: 4810-01-133-9938
FSC: 4810 — Valves, Powered
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
end_item_identificationA7K ACFT
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY THE SOURCE CONTROL DWG NO.
NSN4810-01-133-9938
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: MC12959-1 · 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY THE SOURCE CONTROL DWG NO.
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESALUMINUM ALLOY 7075-T3;ANODIZE;4 WAY,3 POSITION,PILOT OPERATED,SOLENOIDCONTROLLED;FLUID,HYDRAULIC;O/A DIM 5.975 IN. LG;3.310 IN. HT;0.254 IN. MIN. AND 0.264 IN. MAX. DIA THRU MOUNTING HOLES 3 PLACES;-103 SAME AS -101 EXCEPTFOR INTERNAL SPOOL AND SLEEVE ASSY IN
END ITEM IDENTIFICATIONA7K ACFT
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY THE SOURCE CONTROL DWG NO.
OTHER ITEMS IN FSC 4810 — Valves, Powered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4810-00-001-1247 4810-00-001-4499 4810-00-001-4531 4810-00-001-4532 4810-00-001-4554 4810-00-001-4555 4810-00-001-4556 4810-00-001-4611
SUBSTITUTES & CROSS-REFERENCES 1
214-22031-103Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MC12959-1?
MC12959-1 is a VALVE,LINEAR,DIRECTIONAL CONTROL.
What parts can replace MC12959-1?
There is 1 known substitute for MC12959-1: 214-22031-103. Substitute compatibility should be verified for your specific system.
What is the NSN for MC12959-1?
MC12959-1 is cataloged in the U.S. Government catalog under NSN 4810-01-133-9938. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.