PartsTable
Technical Data Sheet
Download PDF

557056 — BACKSHELL,ELECTRICAL CONNECTOR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

557056: BACKSHELL,ELECTRICAL CONNECTOR.

The BACKSHELL,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, overall_width: 0.300 INCHES NOMINAL IN, overall_length: 2.964 INCHES NOMINAL IN, overall_diameter: 2.790 INCHES NOMINAL IN, special_features: JACKSCREW, 2 PLACES, style_designator: STRAIGHT TYPE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-120-4652, 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
557056
NSN: 5340-01-120-4652
NIINs: 011204652, 014506234
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
overall_width0.300 INCHES NOMINAL IN
overall_length2.964 INCHES NOMINAL IN
overall_diameter2.790 INCHES NOMINAL IN
size_designation5
special_featuresJACKSCREW, 2 PLACES
style_designatorSTRAIGHT TYPE
surface_treatmentNICKEL
material_thickness0.045 INCHES NOMINAL IN
cable_opening_length1.380 INCHES NOMINAL IN
cable_opening_diameter0.562 INCHES NOMINAL IN
cable_opening_quantity1
NSN5340-01-120-4652
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 557056 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
•
STYLE DESIGNATOR: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059 COMP 302 MIL SPEC SINGLE MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.122 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.045 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 302
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 COMP 302 MIL SPEC SINGLE MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.122 INCHES NOMINAL IN
OVERALL LENGTH0.780 INCHES NOMINAL IN
OVERALL WIDTH0.300 INCHES NOMINAL IN
MATERIAL THICKNESS0.045 INCHES NOMINAL IN
MATERIALSTEEL COMP 302
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 557056?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 557056?
557056 is a BACKSHELL,ELECTRICAL CONNECTOR.
What is the NSN for 557056?
557056 is cataloged in the U.S. Government catalog under NSN 5340-01-120-4652. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 557056

✓ 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.