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638-1931-003 — 638-1931-003

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

638-1931-003: 638-1931-003.

The 638-1931-003 is a the manufacturer industrial component. Key specifications include outside_diameter: 0.750 INCHES NOMINAL IN, screw_drive_type: HEXAGON SOCKET, special_features: MATERIAL: ZINC ALLOY, style_designator: SKIRTED/ROUND WITH CONCAVE TOP, attachment_method: SETSCREWS, overall_thickness: 0.900 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5355-01-260-9988, 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
638-1931-003
NSN: 5355-01-260-9988
FSC: 5355 — Knobs and Pointers
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
outside_diameter0.750 INCHES NOMINAL IN
screw_drive_typeHEXAGON SOCKET
special_featuresMATERIAL: ZINC ALLOY
style_designatorSKIRTED/ROUND WITH CONCAVE TOP
attachment_methodSETSCREWS
overall_thickness0.900 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES SCREW HOLE IN
setscrew_hole_quantity2
thread_quantity_per_inch40 SCREW HOLE
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SCREW HOLE
gripping_surface_conditionSMOOTH
distance_from_hole_center_to_knob/skirt_base0.230 INCHES NOMINAL IN
NSN5355-01-260-9988
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available 638-1931-003 TITLE COMPONENT PN 638-1931-003 MFR 638-1931-003
KEY FEATURES
•
DISTANCE FROM HOLE CENTER TO KNOB/SKIRT BASE: 0.230 INCHES NOMINAL IN
•
OVERALL THICKNESS: 0.900 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SKIRTED/ROUND WITH CONCAVE TOP
•
OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
SETSCREW HOLE QUANTITY: 2
•
NOMINAL THREAD SIZE: 0.112 INCHES SCREW HOLE IN
•
GRIPPING SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DISTANCE FROM HOLE CENTER TO KNOB/SKIRT BASE0.230 INCHES NOMINAL IN
OVERALL THICKNESS0.900 INCHES NOMINAL IN
STYLE DESIGNATORSKIRTED/ROUND WITH CONCAVE TOP
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
SETSCREW HOLE QUANTITY2
NOMINAL THREAD SIZE0.112 INCHES SCREW HOLE IN
GRIPPING SURFACE CONDITIONSMOOTH
SPECIAL FEATURESMATERIAL: ZINC ALLOY
SCREW DRIVE TYPEHEXAGON SOCKET
THREAD QUANTITY PER INCH40 SCREW HOLE
OTHER ITEMS IN FSC 5355 — Knobs and Pointers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5355-00-000-5777 5355-00-001-2029 5355-00-001-2403 5355-00-001-4109 5355-00-001-4677 5355-00-001-4724 5355-00-001-4730 5355-00-001-4734
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 638-1931-003?
638-1931-003 is a 638-1931-003.
What is the NSN for 638-1931-003?
638-1931-003 is cataloged in the U.S. Government catalog under NSN 5355-01-260-9988. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.