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Technical Data Sheet
PartsTable / COMPONENT / 633B-1.25BR
633B-1.25BR ✓ 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 633B-1.25BR is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-491-0032, 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
633B-1.25BR
NSN: 4730-00-491-0032
FSC: 4730
CAGE: 9H113 — DOVER RESOURCES INC DBA OPW ENGINEERED SYSTEMS (USA)
SPECIFICATIONS
Part Number633B-1.25BR
NSN4730-00-491-0032
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 633B-1.25BR · 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 (FLIS)
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-BInterchangeable
interchangeable cross-reference
interchangeable
633-B-0190Interchangeable
interchangeable cross-reference
interchangeable
633B-AL60Interchangeable
interchangeable cross-reference
interchangeable
MS27030Interchangeable
interchangeable cross-reference
interchangeable
MS27030-7Interchangeable
interchangeable cross-reference
interchangeable
A-A-59326Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 633B-1.25BR?
633B-1.25BR is a 633B-1.25BR.
What parts can replace 633B-1.25BR?
There are 31 known substitutes for 633B-1.25BR: 633-B, 633-B-0190, 633B-AL60 and 28 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 633B-1.25BR?
633B-1.25BR is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-491-0032. 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