PartsTable
Technical Data Sheet
Download PDF

438 — SWITCH ASSEMBLY,SPEED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

438: SWITCH ASSEMBLY,SPEED.

The SWITCH ASSEMBLY,SPEED is a the manufacturer industrial component. Key specifications include shape: TEARDROP, cup_width: 0.8750 INCHES NOMINAL IN, stem_type: NONRISING, base_style: SUB-MINIATURE TWO PIN, bulb_style: T (TUBULAR), cone_width: 1.4219 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-3619, 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
438
NSN: 3110-00-100-3619
NIINs: 001003619, 001013137, 002216337, 002639119, 002689154, 002930206, 005185678, 005412456, 007310821, 007645152, 008442882, 008853336, 010181888, 010249856, 012377030, 013274538, 015310704, 015384359
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 61361 — REXWORKS INC (USA)
SPECIFICATIONS
shapeTEARDROP
cup_width0.8750 INCHES NOMINAL IN
stem_typeNONRISING
base_styleSUB-MINIATURE TWO PIN
bulb_styleT (TUBULAR)
cone_width1.4219 INCHES NOMINAL IN
valve_size0.750 INCHES IN
bonnet_typeINSIDE SCREW
design_typeLIMITED
pin_diameter0.312 INCHES NOMINAL IN
shank_length1.469 INCHES MINIMUM AND 1.531 INCHES MAXIMUM IN
body_diameter4.266 INCHES NOMINAL IN
NSN3110-00-100-3619
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 438 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
CONE WIDTH: 1.4219 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 3.8750 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
CONE WIDTH1.4219 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER3.8750 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
184112H1Reference document
Same NSN cross-reference
Reference document — Secondary reference
142838Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
52387Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 438?
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 438?
438 is a SWITCH ASSEMBLY,SPEED.
What parts can replace 438?
There are 3 known substitutes for 438: 184112H1, 142838, 52387. Substitute compatibility should be verified for your specific system.
What is the NSN for 438?
438 is cataloged in the U.S. Government catalog under NSN 3110-00-100-3619. 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 — 438

✓ 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.