Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 68.0 SHORE DUROMETER A NOMINAL OVERALL, center_hole_diameter: 1.103 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN, cross-sectional_shape_style: O-RING. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-050-1571, 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
S7-21
NSN:5340-00-050-1571 FSC:5340 CAGE:15434 — CUMMINS INC. (USA)
SPECIFICATIONS
material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
temp_rating
-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating
68.0 SHORE DUROMETER A NOMINAL OVERALL
center_hole_diameter
1.103 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN
cross-sectional_height
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
cross-sectional_shape_style
O-RING
material_document_and_classification
MIL-P-5516,CL B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
reference_number_differentiating_characteristics
MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
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FREQUENTLY ASKED QUESTIONS
What is S7-21?
S7-21 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace S7-21?
There are 5 known substitutes for S7-21: S721, J512, 4479FPC35 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S7-21?
S7-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-050-1571. This indicates validated use in U.S. government and defense supply chains.
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