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U135 ✓ 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 LOCK,VALVE SPRING RETAINER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 35.00 MILLIMETERS NOMINAL MM, overall_width: 17.0 MILLIMETERS NOMINAL MM, alignment_type: SELF-ALIGNING, load_direction: RADIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-134-4399, 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
U135
NSN: 4820-00-134-4399
FSC: 4820
CAGE: 64094 — WATTS BROS TOOL WORKS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter35.00 MILLIMETERS NOMINAL MM
overall_width17.0 MILLIMETERS NOMINAL MM
alignment_typeSELF-ALIGNING
load_directionRADIAL
overall_height0.545 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
surface_finishGROUND
special_featuresSIMULA TO STYLE 25 EXCEPT TAPERED BORE 2.500 PER FT TO COUNTERSINK; SPLINT IN THREE SECTIONS 120 DEG
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
thread_provisionUNTHREADED
casehardening_indicatorCASEHARDENED
NSN4820-00-134-4399
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: U135 · 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 7
H224Interchangeable
interchangeable cross-reference
interchangeable
LK131Interchangeable
interchangeable cross-reference
interchangeable
3B1143Interchangeable
interchangeable cross-reference
interchangeable
211603Interchangeable
interchangeable cross-reference
interchangeable
12708AInterchangeable
interchangeable cross-reference
interchangeable
0211603Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is U135?
U135 is a LOCK,VALVE SPRING RETAINER.
What parts can replace U135?
There are 7 known substitutes for U135: H224, LK131, 3B1143 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for U135?
U135 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-134-4399. 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