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1857-SF — LATCH SET,MORTISE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1857-SF: LATCH SET,MORTISE.

The LATCH SET,MORTISE is a the manufacturer industrial component. Key specifications include special_features: NOISE REDUCTION FOR 688 SUBMARINES, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-474-2707, 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
1857-SF
NSN: 5340-01-474-2707
FSC: 5340 — Hardware, Commercial
CAGE: 19175 — STEFANOWICZ & LUTZ INC DBA MERIT METAL PRODUCTS CORP (USA)
SPECIFICATIONS
special_featuresNOISE REDUCTION FOR 688 SUBMARINES
criticality_code_justificationFEAT
NSN5340-01-474-2707
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1857-SF MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONFEAT
SPECIAL FEATURESNOISE REDUCTION FOR 688 SUBMARINES
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
1857DRReference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 1857-SF?
1857-SF is a LATCH SET,MORTISE.
What parts can replace 1857-SF?
There is 1 known substitute for 1857-SF: 1857DR. Substitute compatibility should be verified for your specific system.
What is the NSN for 1857-SF?
1857-SF is cataloged in the U.S. Government catalog under NSN 5340-01-474-2707. This indicates validated use in U.S. government and defense supply chains.
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