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F254B ✓ 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

GOVERNOR,PUMP,PRESSURE REGULATIN. Key specifications include material: STEEL COMP 304 OVERALL, flange_diameter: 2.782 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, seat_angle_in_deg: 45.000 NOMINAL, under_flange_height: 0.562 INCHES NOMINAL IN, body_inside_diameter: 1.553 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-120-5680, 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
F254B
NSN: 4730-01-120-5680
FSC: 4730
CAGE: 77081 — INGERSOLL-DRESSER PUMP CO (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
flange_diameter2.782 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
seat_angle_in_deg45.000 NOMINAL
under_flange_height0.562 INCHES NOMINAL IN
body_inside_diameter1.553 INCHES NOMINAL IN
body_outside_diameter2.628 INCHES NOMINAL IN
seating_surface_shapeANGULAR
flange_seat_to_disk_end_height0.375 INCHES NOMINAL IN
general_characteristics_item_descriptionMATERIAL STEEL,QQ-S-624,FS4140
NSN4730-01-120-5680
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: F254B · 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
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
F254BInterchangeable
interchangeable cross-reference
interchangeable
F254B-PIECE61Interchangeable
interchangeable cross-reference
interchangeable
TB613Interchangeable
interchangeable cross-reference
interchangeable
TB0170Interchangeable
interchangeable cross-reference
interchangeable
TB170Interchangeable
interchangeable cross-reference
interchangeable
F254B-PIECE82Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F254B?
F254B is a GOVERNOR,PUMP,PRESSURE REGULATIN.
What parts can replace F254B?
There are 14 known substitutes for F254B: F254B, F254B-PIECE61, TB613 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F254B?
F254B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-120-5680. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026