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31TA77 — FITTING,LUBRICATION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

31TA77: FITTING,LUBRICATION.

The FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include height: 0.859 INCHES NOMINAL IN, material: STEEL OVERALL, shank_length: 0.312 INCHES NOMINAL IN, special_features: SUFRACE LOCATED BALL CHECK VALVE, style_designator: STRAIGHT, surface_treatment: CHROMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-640-5183, 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
31TA77
NSN: 4730-00-640-5183
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
height0.859 INCHES NOMINAL IN
materialSTEEL OVERALL
shank_length0.312 INCHES NOMINAL IN
special_featuresSUFRACE LOCATED BALL CHECK VALVE
style_designatorSTRAIGHT
surface_treatmentCHROMIUM OVERALL
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.125 INCHES IN
pressure_relief_methodSLOT END
thread_quantity_per_inch27
screw_thread_series_designatorPTF-SPL SHORT
NSN4730-00-640-5183
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 31TA77 · 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: 0.438 INCHES NOMINAL IN
•
SHANK LENGTH: 0.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
PRESSURE RELIEF METHOD: SLOT END
•
HEIGHT: 0.859 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: PTF-SPL SHORT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
SHANK LENGTH0.312 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
NOMINAL THREAD SIZE0.125 INCHES IN
PRESSURE RELIEF METHODSLOT END
HEIGHT0.859 INCHES NOMINAL IN
SPECIAL FEATURESSUFRACE LOCATED BALL CHECK VALVE
SCREW THREAD SERIES DESIGNATORPTF-SPL SHORT
SURFACE TREATMENTCHROMIUM OVERALL
THREAD QUANTITY PER INCH27
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 2
P2529Reference document
Same NSN cross-reference
Reference document — Secondary reference
EE35714Reference document
Same NSN cross-reference
Reference document — Secondary 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 31TA77?
31TA77 is a FITTING,LUBRICATION.
What parts can replace 31TA77?
There are 2 known substitutes for 31TA77: P2529, EE35714. Substitute compatibility should be verified for your specific system.
What is the NSN for 31TA77?
31TA77 is cataloged in the U.S. Government catalog under NSN 4730-00-640-5183. 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.