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ASTM-B687 ✓ 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 CONNECTOR,PLUG,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: LONG, nominal_thread_size: 0.750 INCHES ALL ENDS IN, nominal_overall_length: 3.000 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-012-0497, 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
ASTM-B687
NSN: 4730-00-012-0497
FSC: 4730
CAGE: 81346 — AMERICAN SOCIETY FOR TESTING AND MATERIALS DBA ASTM INTERNATIONAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorLONG
nominal_thread_size0.750 INCHES ALL ENDS IN
nominal_overall_length3.000 INCHES IN
end_item_identification5985-01-156-0572
thread_series_designatorNPT ALL ENDS
nondefinitive_spec/std_data2 TABLE
specification/standard_data81346-ASTM B 687 GOVERNMENT SPECIFICATION
pipe_wall_thickness_designation_for_which_designedSCHEDULE XS ALL ENDS
NSN4730-00-012-0497
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ASTM-B687 · 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
•
NONDEFINITIVE SPEC/STD DATA: 2 TABLE
•
NOMINAL OVERALL LENGTH: 1.000 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81346-B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
STYLE DESIGNATOR: CLOSE
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTMB43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA2 TABLE
NOMINAL OVERALL LENGTH1.000 INCHES IN
SPECIFICATION/STANDARD DATA81346-B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
STYLE DESIGNATORCLOSE
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONASTMB43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES

No verified substitutes available.

LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASTM-B687?
ASTM-B687 is a CONNECTOR,PLUG,ELECTRICAL.
Is ASTM-B687 still available?
ASTM-B687 is currently cancelled.
What is the NSN for ASTM-B687?
ASTM-B687 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-012-0497. 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