PartsTable
Technical Data Sheet
Download PDF

B1638 — B1638

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

B1638: B1638.

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 part is cataloged in the U.S.

Government catalog 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
NIINs: 003312114, 016136025
FSC: 5360 — Coil, Flat, Leaf, and Wire Springs
CAGE: 17472 — EATON AEROSPACE LLC DBA EATON INOAC DIV FUEL & MOTION CONTROL SYSTEMS DIVISION (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
•
SPRING FREE OUTSIDE DIAMETER: 0.606 INCHES NOMINAL IN
•
END STYLE: HINGE END OVERALL
•
END LENGTH: 0.606 INCHES NOMINAL BOTH ENDS IN
•
CENTER SECTION WIDTH: 0.534 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE TORSION RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: SISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
COIL AXIS TO CENTER SECTION DISTANCE: 0.556 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.540 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SPRING FREE OUTSIDE DIAMETER0.606 INCHES NOMINAL IN
END STYLEHINGE END OVERALL
END LENGTH0.606 INCHES NOMINAL BOTH ENDS IN
CENTER SECTION WIDTH0.534 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE TORSION RIGHT HAND
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
INSIDE DIAMETER0.540 INCHES NOMINAL IN
COIL QUANTITY11-1/3
MATERIALSTEEL COMP 302 OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy B1638?
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 B1638?
B1638 is a B1638. It is classified as a MRO (MRO_GENERAL).
What is the NSN for B1638?
B1638 is cataloged in the U.S. Government catalog under NSN 5360-00-331-2114. 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 — B1638

✓ 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.