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R-639 — RESISTOR,VARIABLE,WIRE WOUND,NON

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

R-639: RESISTOR,VARIABLE,WIRE WOUND,NON.

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include length: 0.563 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, body_style: CYLINDRICAL, body_length: 2.410 INCHES MAXIMUM IN, flat_height: 0.344 INCHES NOMINAL IN, insert_size: 0.499 IN. IN.

This part is cataloged in the U.S. Government catalog under NSN 5325-00-372-1488, 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→ R-639
NSN: 5325-00-372-1488
NIINs: 003721488, 009971048, 012060435
FSC: 5325 — Fastening Devices
CAGE: 54978 — SIMPLEX TIME RECORDER LLC (USA)
SPECIFICATIONS
length0.563 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
body_styleCYLINDRICAL
body_length2.410 INCHES MAXIMUM IN
flat_height0.344 INCHES NOMINAL IN
insert_size0.499 IN. IN
shaft_styleROUND, FLATTED
shaft_length2.000 INCHES NOMINAL IN
actuator_typeSINGLE SHAFT
body_diameter6.090 INCHES MAXIMUM IN
overall_length4.457 INCHES MAXIMUM IN
shaft_diameter0.375 INCHES NOMINAL IN
NSN5325-00-372-1488
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: R-639 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE DIAMETER: 1.188 INCHES NOMINAL IN
•
LENGTH: 0.563 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.063 INCHES NOMINAL IN
•
INSERT SIZE: 0.499 IN. IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER1.188 INCHES NOMINAL IN
LENGTH0.563 INCHES NOMINAL IN
FLANGE THICKNESS0.063 INCHES NOMINAL IN
INSERT SIZE0.499 IN. IN
SURFACE TREATMENTNICKEL OVERALL
MATERIALCOPPER ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
104148Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R-639?
R-639 is a RESISTOR,VARIABLE,WIRE WOUND,NON. It is classified as a MRO (MRO_GENERAL).
What parts can replace R-639?
There is 1 known substitute for R-639: 104148. Substitute compatibility should be verified for your specific system.
What is the NSN for R-639?
R-639 is cataloged in the U.S. Government catalog under NSN 5325-00-372-1488. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.