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PartsTable / COMPONENT / 3N48ALT6PC40
3N48ALT6PC40 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The CYLINDER HEAD,COMPRESSOR is a the manufacturer industrial component. Key specifications include material: STEEL, thread_size: 0.812-20, thread_class: 2B, thread_length: 0.250 INCHES NOMINAL IN, overall_length: 0.438 INCHES NOMINAL IN, style_designator: KNURLED, INTERNAL THREAD, SHOULDERED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-218-5912, 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
3N48ALT6PC40
NSN: 4730-00-218-5912
FSC: 4730
CAGE: 54370 — ALFA LAVAL INC. (USA)
SPECIFICATIONS
materialSTEEL
thread_size0.812-20
thread_class2B
thread_length0.250 INCHES NOMINAL IN
overall_length0.438 INCHES NOMINAL IN
style_designatorKNURLED, INTERNAL THREAD, SHOULDERED
thread_directionRIGHT-HAND
length_to_shoulder0.250 INCHES NOMINAL IN
screw_thread_locationINTERNAL
casehardening_indicatorNOT CASEHARDENED
end_item_identificationPOSEIDON SUBMARINE
smallest_inside_diameter0.765 INCHES NOMINAL IN
NSN4730-00-218-5912
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3N48ALT6PC40 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD CLASS: 2B
•
LENGTH TO SHOULDER: 0.250 INCHES NOMINAL IN
•
MAJOR UNTHREADED OUTSIDE DIAMETER: 0.938 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KNURLED, INTERNAL THREAD, SHOULDERED
•
SMALLEST INSIDE DIAMETER: 0.765 INCHES NOMINAL IN
•
SCREW THREAD LOCATION: INTERNAL
•
MATERIAL: STEEL
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
LENGTH TO SHOULDER0.250 INCHES NOMINAL IN
MAJOR UNTHREADED OUTSIDE DIAMETER0.938 INCHES NOMINAL IN
STYLE DESIGNATORKNURLED, INTERNAL THREAD, SHOULDERED
SMALLEST INSIDE DIAMETER0.765 INCHES NOMINAL IN
SCREW THREAD LOCATIONINTERNAL
MATERIALSTEEL
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATIONPOSEIDON SUBMARINE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
NN100PC72Interchangeable
interchangeable cross-reference
interchangeable
NN-19-1Interchangeable
interchangeable cross-reference
interchangeable
3N112PC72Interchangeable
interchangeable cross-reference
interchangeable
901405Interchangeable
interchangeable cross-reference
interchangeable
405MInterchangeable
interchangeable cross-reference
interchangeable
405MQ5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3N48ALT6PC40?
3N48ALT6PC40 is a CYLINDER HEAD,COMPRESSOR.
What parts can replace 3N48ALT6PC40?
There are 33 known substitutes for 3N48ALT6PC40: NN100PC72, NN-19-1, 3N112PC72 and 30 more. Substitute compatibility should be verified for your specific system.
Is 3N48ALT6PC40 still available?
3N48ALT6PC40 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