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NB3-4 ✓ 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 BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 1.0600 INCHES MINIMUM AND 1.0605 INCHES MAXIMUM IN, overall_width: 0.4900 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN, alignment_type: RIGID, overall_height: 1.865 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-136-8642, 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
NB3-4
NSN: 4820-00-136-8642
FSC: 4820
CAGE: 59309 — MCC HOLDINGS, INC. DBA CRANE VALVE NORTH AMERICA DIV CRANE CHEMPHARMA & ENERGY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter1.0600 INCHES MINIMUM AND 1.0605 INCHES MAXIMUM IN
overall_width0.4900 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
alignment_typeRIGID
overall_height1.865 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
surface_finishGROUND
special_featuresOIL HOLE IN OUTER RING
style_designatorNON-SEPARABLE, OPEN END, DRAWN SHELL
body_outside_diameter4.077 INCHES NOMINAL IN
seating_surface_shapeANGULAR
overall_outside_diameter1.3120 INCHES MINIMUM AND 1.3130 INCHES MAXIMUM IN
retainer_fabrication_methodPRESSED
NSN4820-00-136-8642
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NB3-4 · 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
•
BODY OUTSIDE DIAMETER: 4.077 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: ANGULAR
•
MATERIAL: RUBBER FACE
•
STYLE DESIGNATOR: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER4.077 INCHES NOMINAL IN
SEATING SURFACE SHAPEANGULAR
MATERIALRUBBER FACE
MATERIALPLASTIC PHENOLIC BODY
OVERALL HEIGHT1.865 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
NB-34Interchangeable
interchangeable cross-reference
interchangeable
156829R91Interchangeable
interchangeable cross-reference
interchangeable
4840RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NB3-4?
NB3-4 is a BEARING,ROLLER,NEEDLE.
What parts can replace NB3-4?
There are 3 known substitutes for NB3-4: NB-34, 156829R91, 4840R. Substitute compatibility should be verified for your specific system.
What is the NSN for NB3-4?
NB3-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-136-8642. 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