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1103K31 — FITTING,LUBRICATION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1103K31: FITTING,LUBRICATION.

The FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include height: 0.500 INCHES NOMINAL IN, material: STEEL OVERALL, shank_length: 0.080 INCHES NOMINAL IN, style_designator: STRAIGHT, surface_treatment: ZINC OVERALL, width_across_flats: 0.281 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-662-1936, 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
1103K31
NSN: 4730-01-662-1936
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
height0.500 INCHES NOMINAL IN
materialSTEEL OVERALL
shank_length0.080 INCHES NOMINAL IN
style_designatorSTRAIGHT
surface_treatmentZINC OVERALL
width_across_flats0.281 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
end_item_identification4930-01-612-3541; TANK UNIT, FUEL DISPENSE, TRUCK MTD
thread_quantity_per_inch28
screw_thread_series_designatorSAE-LT
part_name_assigned_by_controlling_agencySTRAIGHT 1/4-28 SAE-LT MALE GREASE FITTING
NSN4730-01-662-1936
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1103K31 · 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
•
WIDTH ACROSS FLATS: 0.281 INCHES NOMINAL IN
•
SHANK LENGTH: 0.080 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
HEIGHT: 0.500 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: SAE-LT
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.281 INCHES NOMINAL IN
SHANK LENGTH0.080 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
NOMINAL THREAD SIZE0.250 INCHES IN
HEIGHT0.500 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORSAE-LT
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSTRAIGHT 1/4-28 SAE-LT MALE GREASE FITTING
END ITEM IDENTIFICATION4930-01-612-3541; TANK UNIT, FUEL DISPENSE, TRUCK MTD
THREAD QUANTITY PER INCH28
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
ISO-1219Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 1103K31?
1103K31 is a FITTING,LUBRICATION.
What parts can replace 1103K31?
There is 1 known substitute for 1103K31: ISO-1219. Substitute compatibility should be verified for your specific system.
What is the NSN for 1103K31?
1103K31 is cataloged in the U.S. Government catalog under NSN 4730-01-662-1936. 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.