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Technical Data Sheet
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E5257 — INSERTER,SEAL

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

E5257: INSERTER,SEAL.

The INSERTER,SEAL is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5120-01-591-4572, 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
E5257
NSN: 5120-01-591-4572
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
CAGE: 3D6E9 — MERITOR INDUSTRIAL PRODUCTS, LLC (USA)
SPECIFICATIONS
Part NumberE5257
NSN5120-01-591-4572
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available INSERTER,SEAL TITLE COMPONENT PN E5257 MFR INSERTER,SEAL
OTHER ITEMS IN FSC 5120 — Hand Tools, Nonedged, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5120-00-001-2642 5120-00-001-2644 5120-00-001-2650 5120-00-001-2651 5120-00-001-2652 5120-00-001-2653 5120-00-001-2654 5120-00-001-2655
SUBSTITUTES & CROSS-REFERENCES 4
12637481Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
7488850147Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
88850147Reference document
Same NSN cross-reference
Reference document — Secondary reference
E5257-CDReference 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 E5257?
E5257 is a INSERTER,SEAL.
What parts can replace E5257?
There are 4 known substitutes for E5257: 12637481, 7488850147, 88850147 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E5257?
E5257 is cataloged in the U.S. Government catalog under NSN 5120-01-591-4572. 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.