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Technical Data Sheet
PartsTable / COMPONENT / 1640-12
1640-12 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

CLUTCH HALF,POSITIVE,NONVEHICULA. Key specifications include style_designator: SLIDING JAW, end_item_identification: HYDRAULIC CABLE WICH, part_name_assigned_by_controlling_agency: CLUTCH, DOG. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-540-2778, 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
1640-12
NSN: 4720-00-540-2778
FSC: 4720
CAGE: 82126 — MARE ISLAND NAVAL SHIPYARD (USA)
SPECIFICATIONS
style_designatorSLIDING JAW
end_item_identificationHYDRAULIC CABLE WICH
part_name_assigned_by_controlling_agencyCLUTCH, DOG
NSN4720-00-540-2778
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 1640-12 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
12130Interchangeable
interchangeable cross-reference
interchangeable
7451059Interchangeable
interchangeable cross-reference
interchangeable
241628R91Interchangeable
interchangeable cross-reference
interchangeable
MS51957-84Interchangeable
interchangeable cross-reference
interchangeable
BM12304-04Interchangeable
interchangeable cross-reference
interchangeable
5305PL0968234Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1640-12?
1640-12 is a CLUTCH HALF,POSITIVE,NONVEHICULA.
What parts can replace 1640-12?
There are 29 known substitutes for 1640-12: 12130, 7451059, 241628R91 and 26 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1640-12?
1640-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-540-2778. 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