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Technical Data Sheet
PartsTable / COMPONENT / 156 ITEM 20
156 ITEM 20 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The TUBE,OIL VENT is a the manufacturer industrial component. Key specifications include color: WHITE, material: RUBBER BUTADIENE NITRILE SEALING ELEMENT, case_style: SQUARE, seal_width: 0.500 INCHES NOMINAL IN, temp_rating: 200.0 FAHRENHEIT DEGF, current_type: AC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-01-167-2642, 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
156 ITEM 20
NSN: 4710-01-167-2642
FSC: 4710
CAGE: K7018 — WELLMAN GROUP (GBR)
SPECIFICATIONS
colorWHITE
materialRUBBER BUTADIENE NITRILE SEALING ELEMENT
case_styleSQUARE
seal_width0.500 INCHES NOMINAL IN
temp_rating200.0 FAHRENHEIT DEGF
current_typeAC
body_diameter18.3 MILLIMETERS NOMINAL MM
physical_formPASTE
terminal_typePIN
exterior_colorBLACK
overall_length2.500 INCHES NOMINAL IN
vacuum_in_torr203.2
NSN4710-01-167-2642
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 156 ITEM 20 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
15-620Interchangeable
interchangeable cross-reference
interchangeable
12350526-2Interchangeable
interchangeable cross-reference
interchangeable
3H236-20Interchangeable
interchangeable cross-reference
interchangeable
M608Interchangeable
interchangeable cross-reference
interchangeable
51-10492Interchangeable
interchangeable cross-reference
interchangeable
41101Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 156 ITEM 20?
156 ITEM 20 is a TUBE,OIL VENT.
What parts can replace 156 ITEM 20?
There are 15 known substitutes for 156 ITEM 20: 15-620, 12350526-2, 3H236-20 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 156 ITEM 20?
156 ITEM 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-01-167-2642. 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