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Technical Data Sheet
PartsTable / COMPONENT / HK9C21-176
HK9C21-176 ✓ 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 CLAMP,HOSE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 201 OVERALL, overall_width: 0.500 INCHES NOMINAL IN, inside_diameter: 4.563 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN, special_features: INNER BAND SHOE FOR SOFT MATERIALS, style_designator: WIRE, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-338-1160, 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
HK9C21-176
NSN: 4730-01-338-1160
FSC: 4730
CAGE: 69370 — HO-HO-KUS, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 201 OVERALL
overall_width0.500 INCHES NOMINAL IN
inside_diameter4.563 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
special_featuresINNER BAND SHOE FOR SOFT MATERIALS
style_designatorWIRE
surface_treatmentPASSIVATE OVERALL
fastening_device_typeSLOTTED HEXAGON HEAD SCREW
material_document_and_classificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE SCREW
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-01-338-1160
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HK9C21-176 · 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 COMP 410 SCREW
•
INSIDE DIAMETER: 4.563 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE SCREW
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
STYLE DESIGNATOR: WIRE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 410 SCREW
INSIDE DIAMETER4.563 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE SCREW
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 201 OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
STYLE DESIGNATORWIRE
SPECIAL FEATURESINNER BAND SHOE FOR SOFT MATERIALS
OVERALL WIDTH0.500 INCHES NOMINAL IN
FASTENING DEVICE TYPESLOTTED HEXAGON HEAD SCREW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
DOTZ-8620-DInterchangeable
interchangeable cross-reference
interchangeable
L112651Interchangeable
interchangeable cross-reference
interchangeable
17481Interchangeable
interchangeable cross-reference
interchangeable
9480Interchangeable
interchangeable cross-reference
interchangeable
H90042Interchangeable
interchangeable cross-reference
interchangeable
BM1279Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HK9C21-176?
HK9C21-176 is a CLAMP,HOSE.
What parts can replace HK9C21-176?
There are 16 known substitutes for HK9C21-176: DOTZ-8620-D, L112651, 17481 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HK9C21-176?
HK9C21-176 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-338-1160. 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