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Technical Data Sheet
PartsTable / COMPONENT / 177-971
177-971 ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include color: RED LENS, material: PLASTIC LENS, thread_class: 2A A, thread_length: 0.187 INCHES NOMINAL IN, thread_series: UNEF, overall_length: 0.688 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-4057, 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
177-971
NSN: 4730-00-289-4057
FSC: 4730
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
colorRED LENS
materialPLASTIC LENS
thread_class2A A
thread_length0.187 INCHES NOMINAL IN
thread_seriesUNEF
overall_length0.688 INCHES MAXIMUM IN
mounting_methodTHREAD
thread_diameter0.312 INCHES IN
thread_quantity32 PER INCH
overall_diameter0.578 INCHES NOMINAL IN
style_designatorSTOVEPIPE
thread_directionRIGHT-HAND
NSN4730-00-289-4057
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 177-971 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
SAE-J512Interchangeable
interchangeable cross-reference
interchangeable
00053710Interchangeable
interchangeable cross-reference
interchangeable
0911317Interchangeable
interchangeable cross-reference
interchangeable
ELB0WXINVERTEDFLAREInterchangeable
interchangeable cross-reference
interchangeable
75A10819Interchangeable
interchangeable cross-reference
interchangeable
26-X-50Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 177-971?
177-971 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 177-971?
There are 30 known substitutes for 177-971: SAE-J512, 00053710, 0911317 and 27 more. Substitute compatibility should be verified for your specific system.
Is 177-971 still available?
177-971 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