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Technical Data Sheet
PartsTable / COMPONENT / HM18-8
HM18-8 ✓ 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 INSULATION SLEEVING,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: METAL CONTAINER/CARTRIDGE, duty_type: CONTINUOUS, body_width: 2.000 INCHES MAXIMUM IN, head_style: PAN, time_delay: 0.0015 SECONDS MAXIMUM FIXED OPERATE TIME, body_height: 2.222 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-922-5136, 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
HM18-8
NSN: 4720-00-922-5136
FSC: 4720
CAGE: 46717 — PETTIBONE LLC (USA)
SPECIFICATIONS
materialMETAL CONTAINER/CARTRIDGE
duty_typeCONTINUOUS
body_width2.000 INCHES MAXIMUM IN
head_stylePAN
time_delay0.0015 SECONDS MAXIMUM FIXED OPERATE TIME
body_height2.222 INCHES MAXIMUM IN
body_length2.060 INCHES MAXIMUM IN
design_typeLIMITED
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
body_diameter6.380 INCHES MINIMUM AND 6.640 INCHES MAXIMUM IN
coil_quantity2
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
NSN4720-00-922-5136
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: HM18-8 · 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 23
12FNInterchangeable
interchangeable cross-reference
interchangeable
2250236Interchangeable
interchangeable cross-reference
interchangeable
588B102Interchangeable
interchangeable cross-reference
interchangeable
FN04-02MBInterchangeable
interchangeable cross-reference
interchangeable
A4402Interchangeable
interchangeable cross-reference
interchangeable
314421Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HM18-8?
HM18-8 is a INSULATION SLEEVING,ELECTRICAL.
What parts can replace HM18-8?
There are 23 known substitutes for HM18-8: 12FN, 2250236, 588B102 and 20 more. Substitute compatibility should be verified for your specific system.
Is HM18-8 still available?
HM18-8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026