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4FR316 ✓ 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 FERRULE,BRAZING,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316L, flange_width: 0.036 INCHES NOMINAL IN, overall_length: 0.082 INCHES NOMINAL IN, style_designator: GASKET SEAL, casehardening_indicator: NOT CASEHARDENED, flange_outside_diameter: 0.342 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-772-1638, 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
4FR316
NSN: 4730-00-772-1638
FSC: 4730
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
materialSTEEL COMP 316L
flange_width0.036 INCHES NOMINAL IN
overall_length0.082 INCHES NOMINAL IN
style_designatorGASKET SEAL
casehardening_indicatorNOT CASEHARDENED
flange_outside_diameter0.342 INCHES NOMINAL IN
sleeve_outside_diameter0.295 INCHES NOMINAL IN
material_document_and_classificationASTM A-269, COMP 316L ASSN STD SINGLE MATERIAL RESPONSE
hose/tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
reference_number_differentiating_characteristicsFREE OF MERCURY CONTAMINATION
NSN4730-00-772-1638
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4FR316 · 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 17
BC-F70/216-4363322Interchangeable
interchangeable cross-reference
interchangeable
906F054 PIECE 16Interchangeable
interchangeable cross-reference
interchangeable
404-1-316Interchangeable
interchangeable cross-reference
interchangeable
4FR316Interchangeable
interchangeable cross-reference
interchangeable
4FR316-MERCURY FREEInterchangeable
interchangeable cross-reference
interchangeable
SWAGELOKSS404-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4FR316?
4FR316 is a FERRULE,BRAZING,TUBE FITTING.
What parts can replace 4FR316?
There are 17 known substitutes for 4FR316: BC-F70/216-4363322, 906F054 PIECE 16, 404-1-316 and 14 more. Substitute compatibility should be verified for your specific system.
Is 4FR316 still available?
4FR316 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