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H1644S — FITTING,LUBRICATION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

H1644S: FITTING,LUBRICATION.

The FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include height: 0.560 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, shank_length: 0.230 INCHES NOMINAL IN, shank_diameter: 0.437 INCHES NOMINAL IN, style_designator: STRAIGHT, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-719-1017, 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
H1644S
NSN: 4730-01-719-1017
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 3AXX2 — FLINTHILLS TRADING COMPANY, LLC DBA GL HUYETT (USA)
SPECIFICATIONS
height0.560 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
shank_length0.230 INCHES NOMINAL IN
shank_diameter0.437 INCHES NOMINAL IN
style_designatorSTRAIGHT
surface_treatmentPASSIVATE OVERALL
width_across_flats0.437 INCHES NOMINAL IN
nominal_thread_size0.125 INCHES IN
thread_quantity_per_inch27
screw_thread_series_designatorPTF-SPL EXTRA SHORT
NSN4730-01-719-1017
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: H1644S · 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
•
SHANK DIAMETER: 0.437 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.437 INCHES NOMINAL IN
•
SHANK LENGTH: 0.230 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
HEIGHT: 0.560 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: PTF-SPL EXTRA SHORT
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.437 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.437 INCHES NOMINAL IN
SHANK LENGTH0.230 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
NOMINAL THREAD SIZE0.125 INCHES IN
HEIGHT0.560 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORPTF-SPL EXTRA SHORT
SURFACE TREATMENTPASSIVATE OVERALL
THREAD QUANTITY PER INCH27
MATERIALSTEEL CORROSION RESISTING OVERALL
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
8794942/SHEET 1, FIND 2Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H1644S?
H1644S is a FITTING,LUBRICATION.
What parts can replace H1644S?
There is 1 known substitute for H1644S: 8794942/SHEET 1, FIND 2. Substitute compatibility should be verified for your specific system.
What is the NSN for H1644S?
H1644S is cataloged in the U.S. Government catalog under NSN 4730-01-719-1017. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.