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646912 — PISTON ASSEMBLY,FUEL VALVE

✓ Government record, cited
Bosch · PIPE SECTION
PRODUCT OVERVIEW

646912: PISTON ASSEMBLY,FUEL VALVE.

The PISTON ASSEMBLY,FUEL VALVE is a Bosch industrial component. Key specifications include general_characteristics_item_description: 1.172 IN. LG,2.375 IN.

DIA,C/O 1 BODY,1 RETAINER,1 RING,6 RIVETS IN. This part is cataloged in the U.S. Government catalog under NSN 4710-00-015-1673, 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
646912
NSN: 4710-00-015-1673
NIINs: 000151673, 004866050
FSC: 4710 — Pipe, Tube and Rigid Tubing
CAGE: 33830 — AERO TUBE TECHNOLOGIES, LLC DBA TUBE BENDS (USA)
SPECIFICATIONS
general_characteristics_item_description1.172 IN. LG,2.375 IN. DIA,C/O 1 BODY,1 RETAINER,1 RING,6 RIVETS IN
NSN4710-00-015-1673
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 646912 · Bosch ⚠ 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
•
DESIGN FORM: PREBENT
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
BOLT HOLE DIAMETER: 0.280 INCHES NOMINAL SINGLE END IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5576 ASSN STD SINGLE MATERIAL RESPONSE TUBING
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WALL THICKNESS: 0.020 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4 SINGLE END
•
BOLT CIRCLE DIAMETER: 2.500 INCHES NOMINAL SINGLE END IN
TECHNICAL CHARACTERISTICS
DESIGN FORMPREBENT
CRITICALITY CODE JUSTIFICATIONFEAT
BOLT HOLE DIAMETER0.280 INCHES NOMINAL SINGLE END IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5576 ASSN STD SINGLE MATERIAL RESPONSE TUBING
WALL THICKNESS0.020 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
BOLT HOLE QUANTITY4 SINGLE END
BOLT CIRCLE DIAMETER2.500 INCHES NOMINAL SINGLE END IN
SPECIAL FEATURESDUE TO CRITICAL FEATURES, TOLERANCES, FIT RESTRICTIONS, MATERIAL PROPERTIES AND MANUFACTURING PROCESS. FAILURE COULD RESULT IN LOSS OR SUBSTANTIAL DAMAGE TO WEAPON SYSTEM, DEATH OR SERIOUS INJURY
MATERIALSTEEL COMP 321 TUBING
SUBSTITUTES & CROSS-REFERENCES 1
484023Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 646912?
646912 is a PISTON ASSEMBLY,FUEL VALVE manufactured by Bosch.
What parts can replace 646912?
There is 1 known substitute for 646912: 484023. Substitute compatibility should be verified for your specific system.
What is the NSN for 646912?
646912 is cataloged in the U.S. Government catalog under NSN 4710-00-015-1673. 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.