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Technical Data Sheet
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B1638 — Technical Data Sheet

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— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The B1638 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, end_style: HINGE END OVERALL, end_length: 0.606 INCHES NOMINAL BOTH ENDS IN, coil_quantity: 11-1/3, inside_diameter: 0.540 INCHES NOMINAL IN, style_designator: SINGLE TORSION RIGHT HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-331-2114, 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
MRO→ MRO_GENERAL→ B1638
NSN: 5360-00-331-2114
FSC: 5360
CAGE: 72121 — EATON MOTOR SITE (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
end_styleHINGE END OVERALL
end_length0.606 INCHES NOMINAL BOTH ENDS IN
coil_quantity11-1/3
inside_diameter0.540 INCHES NOMINAL IN
special_featuresA PART, ASSEMBLY, OR SYSTEM IDENTIFIED AS ESSENTIAL TO WEAPON SYSTEM PERFORMANCE OR OPERATION TO PRESERVE LIFE AND SAFETY OF PERSONNEL
style_designatorSINGLE TORSION RIGHT HAND
center_section_width0.534 INCHES NOMINAL IN
end_angular_relationshipEND W/LH HELIX OF COIL ANGLED TO CENTER SECTION AND END W/RH HELIX OF COIL ANGLED TO CENTER SECTION
spring_free_outside_diameter0.606 INCHES NOMINAL IN
criticality_code_justificationFEAT
coil_axis_to_center_section_distance0.556 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN
NSN5360-00-331-2114
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available B1638 TITLE COMPONENT PN B1638 MFR B1638
KEY FEATURES
•
INSIDE DIAMETER: 0.540 INCHES NOMINAL IN
•
COIL QUANTITY: 11-1/3
•
END STYLE: HINGE END OVERALL
•
END ANGULAR RELATIONSHIP: END W/LH HELIX OF COIL ANGLED TO CENTER SECTION AND END W/RH HELIX OF COIL ANGLED TO CENTER SECTION
•
STYLE DESIGNATOR: SINGLE TORSION RIGHT HAND
•
MATERIAL: STEEL COMP 302 OVERALL
•
END LENGTH: 0.606 INCHES NOMINAL BOTH ENDS IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER0.540 INCHES NOMINAL IN
COIL QUANTITY11-1/3
END STYLEHINGE END OVERALL
END ANGULAR RELATIONSHIPEND W/LH HELIX OF COIL ANGLED TO CENTER SECTION AND END W/RH HELIX OF COIL ANGLED TO CENTER SECTION
STYLE DESIGNATORSINGLE TORSION RIGHT HAND
MATERIALSTEEL COMP 302 OVERALL
END LENGTH0.606 INCHES NOMINAL BOTH ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATIONSISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
COIL AXIS TO CENTER SECTION DISTANCE0.556 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN
CENTER SECTION WIDTH0.534 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
N134594Interchangeable
interchangeable cross-reference
interchangeable
10-00233Interchangeable
interchangeable cross-reference
interchangeable
79C0982-21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B1638?
B1638 is a B1638. It is classified as a MRO (MRO_GENERAL).
What parts can replace B1638?
There are 3 known substitutes for B1638: N134594, 10-00233, 79C0982-21. Substitute compatibility should be verified for your specific system.
What is the NSN for B1638?
B1638 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-331-2114. This indicates validated use in U.S. government and defense supply chains.
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Last verified: August 2026