PartsTable
Technical Data Sheet
B687 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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 RESISTOR,FIXED,WIRE WOUND is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, body_width: 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN, leg_length: 0.891 INCHES NOMINAL SECOND END IN, link_style: PIN, body_height: 1.970 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN, body_length: 2.970 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-050-1989, 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
MRO MRO_GENERAL B687
NSN: 4730-00-050-1989
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
body_width1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN
leg_length0.891 INCHES NOMINAL SECOND END IN
link_stylePIN
body_height1.970 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN
body_length2.970 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
corner_shapeSQUARE ALL CORNERS
terminal_typeTAB W/WIRE LEAD W/TAB
inclosure_typeENCAPSULATED
overall_length0.8750 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
NSN4730-00-050-1989
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 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
STYLE DESIGNATOR: CLOSE
NOMINAL THREAD SIZE: 0.125 INCHES ALL ENDS IN
NONDEFINITIVE SPEC/STD DATA: 2 TYPE
NOMINAL OVERALL LENGTH: 0.750 INCHES IN
MATERIAL: COPPER ALLOY OVERALL
THREAD SERIES DESIGNATOR: NPT ALL ENDS
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCLOSE
NOMINAL THREAD SIZE0.125 INCHES ALL ENDS IN
NONDEFINITIVE SPEC/STD DATA2 TYPE
NOMINAL OVERALL LENGTH0.750 INCHES IN
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
MS51846-99Interchangeable
interchangeable cross-reference
interchangeable
765260-025Interchangeable
interchangeable cross-reference
interchangeable
B687Interchangeable
interchangeable cross-reference
interchangeable
WWN351Interchangeable
interchangeable cross-reference
interchangeable
13275AInterchangeable
interchangeable cross-reference
interchangeable
ASTM-B687Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B687?
B687 is a RESISTOR,FIXED,WIRE WOUND. It is classified as a MRO (MRO_GENERAL).
What parts can replace B687?
There are 27 known substitutes for B687: MS51846-99, 765260-025, B687 and 24 more. Substitute compatibility should be verified for your specific system.
Is B687 still available?
B687 is currently cancelled.
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