B2557 — THREAD PIECE,UNION

✓ Government record, cited

— · HOSE FITTING

PRODUCT OVERVIEW

B2557: THREAD PIECE,UNION.

The THREAD PIECE,UNION is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, seat_type: RECESSED FACE, thread_size: 1/2-14, overall_length: 1.375 INCHES NOMINAL IN, special_features: MATERIAL SPEC QQ-S-763 UN S31600, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-512-9084, 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

B2557

NSN: 4730-01-512-9084
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 99565 — ADMIRAL VALVE LLC DBA CPV MANUFACTURING (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING
seat_type	RECESSED FACE
thread_size	1/2-14
overall_length	1.375 INCHES NOMINAL IN
special_features	MATERIAL SPEC QQ-S-763 UN S31600
thread_direction	RIGHT-HAND
end_connection_type	THREADED
screw_thread_location	INTERNAL
union_end_thread_size	1-5/8-16
tubing_outside_diameter	0.500 INCHES NOMINAL IN
union_end_thread_direction	RIGHT-HAND
nominal_pipe_size_designation	0.500 INCHES IN
NSN	4730-01-512-9084

COMPONENT DIAGRAM

KEY FEATURES

•

UNION END THREAD DIRECTION: RIGHT-HAND

•

NOMINAL PIPE SIZE DESIGNATION: 0.500 INCHES IN

•

END CONNECTION TYPE: THREADED

•

UNION END THREAD SIZE: 1-5/8-16

•

SEAT TYPE: RECESSED FACE

•

THREAD DIRECTION: RIGHT-HAND

•

TUBING OUTSIDE DIAMETER: 0.500 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

UNION END THREAD DIRECTION	RIGHT-HAND
NOMINAL PIPE SIZE DESIGNATION	0.500 INCHES IN
END CONNECTION TYPE	THREADED
UNION END THREAD SIZE	1-5/8-16
OVERALL LENGTH	1.375 INCHES NOMINAL IN
SEAT TYPE	RECESSED FACE
THREAD DIRECTION	RIGHT-HAND
TUBING OUTSIDE DIAMETER	0.500 INCHES NOMINAL IN
THREAD SIZE	1/2-14
SPECIAL FEATURES	MATERIAL SPEC QQ-S-763 UN S31600

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

73T-3-SSSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 B2557?

B2557 is a THREAD PIECE,UNION.

What parts can replace B2557?

There is 1 known substitute for B2557: 73T-3-SS. Substitute compatibility should be verified for your specific system.

What is the NSN for B2557?

B2557 is cataloged in the U.S. Government catalog under NSN 4730-01-512-9084. This indicates validated use in U.S. government and defense supply chains.

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