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1135 ITEM 12 ✓ 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 length: 0.812 INCHES NOMINAL SQUARE END IN, material: STEEL OVERALL, bore_shape: STRAIGHT, point_type: CONVENTIONAL, body_length: 0.844 INCHES NOMINAL IN, point_angle: 118.0 DEGREES NOMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-299-4056, 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
1135 ITEM 12
NSN: 4820-01-299-4056
FSC: 4820
CAGE: 8W880 — R & D MACHINE RAFAEL ANAYA DIV DEFENSE LOGISTICS AGENCY (USA)
SPECIFICATIONS
length0.812 INCHES NOMINAL SQUARE END IN
materialSTEEL OVERALL
bore_shapeSTRAIGHT
point_typeCONVENTIONAL
body_length0.844 INCHES NOMINAL IN
point_angle118.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length0.375 INCHES NOMINAL IN
bore_diameter50.00 MILLIMETERS NOMINAL MM
overall_width1.1875 INCHES NOMINAL IN
rating_methodWINDING TURNS SINGLE COMPONENT SINGLE PRIMARY
thread_length2.560 INCHES MINIMUM IN
NSN4820-01-299-4056
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1135 ITEM 12 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
5510X1AInterchangeable
interchangeable cross-reference
interchangeable
11361Interchangeable
interchangeable cross-reference
interchangeable
904031Interchangeable
interchangeable cross-reference
interchangeable
54924Interchangeable
interchangeable cross-reference
interchangeable
B94.9 1-8 UNC HS G H4Interchangeable
interchangeable cross-reference
interchangeable
C01032Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1135 ITEM 12?
1135 ITEM 12 is a SEAT,VALVE.
What parts can replace 1135 ITEM 12?
There are 21 known substitutes for 1135 ITEM 12: 5510X1A, 11361, 904031 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1135 ITEM 12?
1135 ITEM 12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-299-4056. 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