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Technical Data Sheet
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6KP21 ✓ 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

The PLUG,PIPE is a the manufacturer industrial component. Key specifications include material: IRON OR STEEL OVERALL, body_type: CORED, head_type: SOLID, core_depth: 0.085 INCHES MAXIMUM IN, drive_end_style: RAISED SQUARE, connection_style: PLAIN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-187-4210, 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
6KP21
NSN: 4730-00-187-4210
FSC: 4730
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
materialIRON OR STEEL OVERALL
body_typeCORED
head_typeSOLID
core_depth0.085 INCHES MAXIMUM IN
drive_end_styleRAISED SQUARE
connection_stylePLAIN
thread_directionRIGHT-HAND EXTERNAL
body_core_diameter0.578 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES EXTERNAL IN
thread_series_designatorNPT EXTERNAL
material_document_and_classificationQQ-I-652 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_pipe_size_for_which_designed0.750 INCHES IN
NSN4730-00-187-4210
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6KP21 · 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
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 0.750 INCHES IN
•
MATERIAL: IRON OR STEEL OVERALL
•
HEAD TYPE: SOLID
•
THREAD SERIES DESIGNATOR: NPT EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-I-652 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE END STYLE: RAISED SQUARE
•
CORE DEPTH: 0.085 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.750 INCHES IN
MATERIALIRON OR STEEL OVERALL
HEAD TYPESOLID
THREAD SERIES DESIGNATORNPT EXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-I-652 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DRIVE END STYLERAISED SQUARE
CORE DEPTH0.085 INCHES MAXIMUM IN
CONNECTION STYLEPLAIN
BODY CORE DIAMETER0.578 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
25928Interchangeable
interchangeable cross-reference
interchangeable
650Interchangeable
interchangeable cross-reference
interchangeable
11207598Interchangeable
interchangeable cross-reference
interchangeable
650-315Interchangeable
interchangeable cross-reference
interchangeable
A48X33Interchangeable
interchangeable cross-reference
interchangeable
16808Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6KP21?
6KP21 is a PLUG,PIPE.
What parts can replace 6KP21?
There are 22 known substitutes for 6KP21: 25928, 650, 11207598 and 19 more. Substitute compatibility should be verified for your specific system.
Is 6KP21 still available?
6KP21 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026