4-FP-B — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited

— · HOSE FITTING

PRODUCT OVERVIEW

4-FP-B: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include length: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM SQUARE END IN, material: STEEL OVERALL, thread_length: 1.062 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN, overall_length: 2.688 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN, shank_diameter: 0.3165 INCHES MINIMUM AND 0.3180 INCHES MAXIMUM IN, special_features: FINISHING TAP FOR SCREW THREAD INSERT. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-851-3255, 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

4-FP-B

NSN: 4730-00-851-3255
NIINs: 008513255, 010382907
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14233 — HOFMANN ENGINEERING CO INC (USA)

SPECIFICATIONS

length	0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM SQUARE END IN
material	STEEL OVERALL
thread_length	1.062 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
flute_quantity	3
overall_length	2.688 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
shank_diameter	0.3165 INCHES MINIMUM AND 0.3180 INCHES MAXIMUM IN
special_features	FINISHING TAP FOR SCREW THREAD INSERT
style_designator	STRAIGHT FLUTE
thread_direction	RIGHT-HAND
thread_structure	REGULAR
width_across_flats	0.234 INCHES MINIMUM AND 0.238 INCHES MAXIMUM IN
starting_chamfer_type	PLUG
NSN	4730-00-851-3255

COMPONENT DIAGRAM

KEY FEATURES

•

CONNECTION STYLE: PLAIN ALL ENDS

•

CONNECTION TYPE: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION

•

STYLE DESIGNATOR: MALE COUPLING HALF

•

QUICK DISCONNECT NOMINAL SIZE: 0.422 INCHES ALL ENDS IN

•

LEG LENGTH: 0.969 INCHES NOMINAL IN

•

NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN

TECHNICAL CHARACTERISTICS

CONNECTION STYLE	PLAIN ALL ENDS
CONNECTION TYPE	THREADED INTERNAL PIPE FIRST FLUID END CONNECTION
CONNECTION TYPE	EXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATOR	MALE COUPLING HALF
OVERALL LENGTH	1.938 INCHES NOMINAL IN
QUICK DISCONNECT NOMINAL SIZE	0.422 INCHES ALL ENDS IN
LEG LENGTH	0.969 INCHES NOMINAL IN
NOMINAL THREAD SIZE	0.500 INCHES ALL ENDS IN
SPECIAL FEATURES	AS PER FIIG THE RESPONSE FOR BRASS IS CUB000, NOTE THAT THE BODY MATERIAL IS BRASS, THEREFORE THE MRC MATT IS NOT BEING RESPONDED TO, AS THE TIR WILL READ COPPER ALLOY, AND THIS COULD CAUSE CONFUSION.
QUICK DISCONNECT METHOD	PUSH-PULL ALL ENDS

SUBSTITUTES & CROSS-REFERENCES 5

10185913Reference document

Same NSN cross-reference

Reference document — Drawing number reference only

50FPBSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

7746653P73Reference document

Same NSN cross-reference

Reference document — Secondary reference

BST-N4Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

B4T26Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 4-FP-B?

4-FP-B is a COUPLING HALF,QUICK DISCONNECT.

What parts can replace 4-FP-B?

There are 5 known substitutes for 4-FP-B: 10185913, 50FPB, 7746653P73 and 2 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 4-FP-B?

4-FP-B is cataloged in the U.S. Government catalog under NSN 4730-00-851-3255. This indicates validated use in U.S. government and defense supply chains.

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