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1293K21 — FITTING,LUBRICATION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1293K21: FITTING,LUBRICATION.

The FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, special_features: MATERIAL IS MONEL BRASS AND TYPE 303 STAINLESS,TYPE M STRAIGHT 1/4-28 TAPER,MEETS MS15720-1 SPEC, style_designator: STRAIGHT, width_across_flats: 0.312 INCHES NOMINAL IN, nominal_thread_size: 0.250 INCHES IN, screw_thread_series_designator: TAPER DRIVE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-571-8501, 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
1293K21
NSN: 4730-01-571-8501
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 3A054 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
special_featuresMATERIAL IS MONEL BRASS AND TYPE 303 STAINLESS,TYPE M STRAIGHT 1/4-28 TAPER,MEETS MS15720-1 SPEC
style_designatorSTRAIGHT
width_across_flats0.312 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
screw_thread_series_designatorTAPER DRIVE
part_name_assigned_by_controlling_agencyGREASE FITTING
NSN4730-01-571-8501
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1293K21 · 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: 0.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
SCREW THREAD SERIES DESIGNATOR: TAPER DRIVE
•
MATERIAL: STEEL COMP 303 OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.312 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
NOMINAL THREAD SIZE0.250 INCHES IN
SPECIAL FEATURESMATERIAL IS MONEL BRASS AND TYPE 303 STAINLESS,TYPE M STRAIGHT 1/4-28 TAPER,MEETS MS15720-1 SPEC
SCREW THREAD SERIES DESIGNATORTAPER DRIVE
PART NAME ASSIGNED BY CONTROLLING AGENCYGREASE FITTING
MATERIALSTEEL COMP 303 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1293K21?
1293K21 is a FITTING,LUBRICATION.
What is the NSN for 1293K21?
1293K21 is cataloged in the U.S. Government catalog under NSN 4730-01-571-8501. 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.