PartsTable
Technical Data Sheet
6HP31 ✓ 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 COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL BODY, leg_length: 0.750 INCHES NOMINAL IN, connection_type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION, furnished_items: PREFORMED PACKING AND SPRING, connection_style: GASKET SEAL ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-257-0236, 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
6HP31
NSN: 4730-00-257-0236
FSC: 4730
CAGE: 73992 — TUTHILL CORP HANSEN COUPLING DIV (USA)
SPECIFICATIONS
materialSTEEL BODY
leg_length0.750 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
furnished_itemsPREFORMED PACKING AND SPRING
connection_styleGASKET SEAL ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
nominal_thread_size0.750 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-PULL SECOND QUICK DISCONNECT END
thread_series_designatorNPT ALL ENDS
mating_end_identificationHANSEN MFG CO. COUPLING HALF,QUICK DISCONNECT,PART NO. 6-K31
quick_disconnect_nominal_size0.750 INCHES SECOND QUICK DISCONNECT END IN
NSN4730-00-257-0236
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6HP31 · 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
CONNECTION TYPE: INTERNAL QUICK DISCONNECT ALL ENDSUNABLE TO DECODE
STYLE DESIGNATOR: MALE COUPLING HALF
SURFACE TREATMENT: CADMIUM BODY
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDSUNABLE TO DECODE IN
MATERIAL: STEEL BODYUNABLE TO DECODE
FEATURES PROVIDED: SELF-SEALING
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDSUNABLE TO DECODE
STYLE DESIGNATORMALE COUPLING HALF
SURFACE TREATMENTCADMIUM BODY
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDSUNABLE TO DECODE
NOMINAL THREAD SIZE0.750 INCHES ALL ENDSUNABLE TO DECODE IN
MATERIALSTEEL BODYUNABLE TO DECODE
SURFACE TREATMENTCADMIUM BODYUNABLE TO DECODE
FEATURES PROVIDEDSELF-SEALING
CONNECTION STYLEPLAIN ALL ENDSUNABLE TO DECODE
QUICK DISCONNECT METHODPUSH-PULL ALL ENDSUNABLE TO DECODE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
6H31-BS-143Interchangeable
interchangeable cross-reference
interchangeable
6-H31Interchangeable
interchangeable cross-reference
interchangeable
P748AInterchangeable
interchangeable cross-reference
interchangeable
13211E3213Interchangeable
Same NIIN cross-reference
interchangeable
6H31CSCDInterchangeable
Same NIIN cross-reference
interchangeable
FD45-1191-12-12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6HP31?
6HP31 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 6HP31?
There are 8 known substitutes for 6HP31: 6H31-BS-143, 6-H31, P748A and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6HP31?
6HP31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-257-0236. This indicates validated use in U.S. government and defense supply chains.
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