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Technical Data Sheet
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4429K521 — BUSHING,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4429K521: BUSHING,PIPE.

The BUSHING,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, special_features: LOW-PRESSURE BRASS THREADED PIPE FITTING 1/4 MALE X 1/8 FEMALE PIPE SIZE, REDUCING BUSHING, style_designator: FACE BUSHING, end_item_identification: 5895-01-608-2698, external_thread_direction: RIGHT-HAND, part_name_assigned_by_controlling_agency: BUSHING, PIPE; MALE AND FEMALE REDUCING BUSHINGS; A.K.A: FACE BUSHINGS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-617-4948, 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
4429K521
NSN: 4730-01-617-4948
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY
special_featuresLOW-PRESSURE BRASS THREADED PIPE FITTING 1/4 MALE X 1/8 FEMALE PIPE SIZE, REDUCING BUSHING
style_designatorFACE BUSHING
end_item_identification5895-01-608-2698
external_thread_directionRIGHT-HAND
part_name_assigned_by_controlling_agencyBUSHING, PIPE; MALE AND FEMALE REDUCING BUSHINGS; A.K.A: FACE BUSHINGS
NSN4730-01-617-4948
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4429K521 · 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
•
STYLE DESIGNATOR: FACE BUSHING
•
MATERIAL: COPPER ALLOY
•
EXTERNAL THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFACE BUSHING
SPECIAL FEATURESLOW-PRESSURE BRASS THREADED PIPE FITTING 1/4 MALE X 1/8 FEMALE PIPE SIZE, REDUCING BUSHING
PART NAME ASSIGNED BY CONTROLLING AGENCYBUSHING, PIPE; MALE AND FEMALE REDUCING BUSHINGS; A.K.A: FACE BUSHINGS
END ITEM IDENTIFICATION5895-01-608-2698
MATERIALCOPPER ALLOY
EXTERNAL THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 1
218170-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 4429K521?
4429K521 is a BUSHING,PIPE.
What parts can replace 4429K521?
There is 1 known substitute for 4429K521: 218170-01. Substitute compatibility should be verified for your specific system.
What is the NSN for 4429K521?
4429K521 is cataloged in the U.S. Government catalog under NSN 4730-01-617-4948. 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.