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3657-40-1 — TUBE,VACUUM PUMP

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

3657-40-1: TUBE,VACUUM PUMP.

The TUBE,VACUUM PUMP is a the manufacturer industrial component. Key specifications include end_item_identification: KING NUTRONICS PORTABLE CALIBRATION SYSTEM 3657-40, general_characteristics_item_description: AL ALLOY 2024 T351;1.000 IN.OD;ONE END THREADED 0.750-20UNEF,0.370 IN.L;OTHER END 0.500 IN.ID;4.248 IN.O/A L;VENT IN. This part is cataloged in the U.S.

Government catalog under NSN 4710-01-187-7083, 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
3657-40-1
NSN: 4710-01-187-7083
FSC: 4710 — Pipe, Tube and Rigid Tubing
CAGE: 13859 — KING NUTRONICS CORPORATION DBA KING NUTRONICS (USA)
SPECIFICATIONS
end_item_identificationKING NUTRONICS PORTABLE CALIBRATION SYSTEM 3657-40
general_characteristics_item_descriptionAL ALLOY 2024 T351;1.000 IN.OD;ONE END THREADED 0.750-20UNEF,0.370 IN.L;OTHER END 0.500 IN.ID;4.248 IN.O/A L;VENT IN
NSN4710-01-187-7083
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 3657-40-1 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: AL ALLOY 2024 T351;1.000 IN.OD;ONE END THREADED 0.750-20UNEF,0.370 IN.L;OTHER END 0.500 IN.ID;4.248 IN.O/A L;VENT IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONAL ALLOY 2024 T351;1.000 IN.OD;ONE END THREADED 0.750-20UNEF,0.370 IN.L;OTHER END 0.500 IN.ID;4.248 IN.O/A L;VENT IN
END ITEM IDENTIFICATIONKING NUTRONICS PORTABLE CALIBRATION SYSTEM 3657-40
SUBSTITUTES & CROSS-REFERENCES 1
3657-40Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3657-40-1?
3657-40-1 is a TUBE,VACUUM PUMP.
What parts can replace 3657-40-1?
There is 1 known substitute for 3657-40-1: 3657-40. Substitute compatibility should be verified for your specific system.
What is the NSN for 3657-40-1?
3657-40-1 is cataloged in the U.S. Government catalog under NSN 4710-01-187-7083. 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.