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633-B-1-1/4IN-BR — Technical Data Sheet

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— · 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: COPPER ALLOY BODY, leg_length: 0.875 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN, overall_length: 2.650 INCHES MINIMUM AND 2.828 INCHES MAXIMUM IN, connection_type: INTERNAL QUICK DISCONNECT ALL ENDS, connection_style: PLAIN 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 under NSN 4730-00-491-0032, 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
633-B-1-1/4IN-BR
NSN: 4730-00-491-0032
FSC: 4730
CAGE: 81718 — OPW FUELING COMPONENTS INC. DIV OPW FUELING COMPONENTS (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.875 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
overall_length2.650 INCHES MINIMUM AND 2.828 INCHES MAXIMUM IN
connection_typeINTERNAL QUICK DISCONNECT ALL ENDS
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
nominal_thread_size1.250 INCHES ALL ENDS IN
quick_disconnect_methodCAM-LOCKING ALL ENDS
thread_series_designatorNPT ALL ENDS
nondefinitive_spec/std_data2 CLASS
specification/standard_data58536-A-A59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
NSN4730-00-491-0032
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 633-B-1-1/4IN-BR · 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 STYLE: PLAIN ALL ENDS
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION TYPE: INTERNAL QUICK DISCONNECT ALL ENDS
•
SPECIFICATION/STANDARD DATA: 58536-A-A59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
•
QUICK DISCONNECT METHOD: CAM-LOCKING ALL ENDS
•
FURNISHED ITEMS AND QUANTITY: 2 PIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 ALLOY 836,844 OR 922 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NONDEFINITIVE SPEC/STD DATA: 2 CLASS
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN ALL ENDS
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
SPECIFICATION/STANDARD DATA58536-A-A59326 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
QUICK DISCONNECT METHODCAM-LOCKING ALL ENDS
FURNISHED ITEMS AND QUANTITY2 PIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 ALLOY 836,844 OR 922 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
NONDEFINITIVE SPEC/STD DATA2 CLASS
FEATURES PROVIDEDSELF-SEALING
NOMINAL THREAD SIZE1.250 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
633-BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
633-B-0190InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
633B-AL60InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS27030InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS27030-7InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-A-59326InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 633-B-1-1/4IN-BR?
633-B-1-1/4IN-BR is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 633-B-1-1/4IN-BR?
There are 31 known substitutes for 633-B-1-1/4IN-BR: 633-B, 633-B-0190, 633B-AL60 and 28 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 633-B-1-1/4IN-BR?
633-B-1-1/4IN-BR is cataloged in the Federal Logistics Information System under NSN 4730-00-491-0032. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026