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339 — POLARIZING KEY,ELECTRICAL CONNEC

✓ Government record, cited
Melissa & Doug · MRO · MRO_GENERAL
PRODUCT OVERVIEW

339: POLARIZING KEY,ELECTRICAL CONNEC.

This 21-piece wooden sound puzzle pronounces the name of each number when its piece is placed correctly! Pieces are slightly raised above the puzzle board for easy grasping. Colorful pictures underneath each piece help teach counting and reinforce the relationship between quantities and numerals.

This educational puzzle has lots of ways to learn and play! (TIP: Puzzle has light-activated sensors; for best results, expose the sensor by removing a piece in a brightly lit room, then make the sound play by replacing the piece in the board.) This part is cataloged in the U.S. Government catalog under NSN 3110-00-100-0206, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
MRO→ MRO_GENERAL→ 339
NSN: 3110-00-100-0206
NIINs: 001000206, 001560752, 002321086, 002427617, 002508682, 002628627, 004297230, 006828183, 009739974, 010883862, 011352487, 012378365, 013002823, 013125833, 013384863, 015803055, 017361646
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 51588 — RBC BEARINGS INCORPORATED DIV WEST TRENTON DIVISION (USA)
SPECIFICATIONS
face_width4.13 INCHES NOMINAL IN
capacity_rating3.55 POUNDS NOMINAL LBS
surface_treatmentANODIZE OVERALL
charge_design_typeSTANDARD
control_device_typeSQUEEZE-GRIP
part_name_assigned_by_controlling_agencyEXTINGUISHERS
NSN3110-00-100-0206
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 339 · Melissa & Doug ⚠ 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: 0.0312 INCHES NOMINAL IN
•
CONE WIDTH: 0.8820 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 1.3779 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.0312 INCHES NOMINAL IN
CONE WIDTH0.8820 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.3779 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
149135Reference document
Same NSN cross-reference
Reference document — Secondary reference
8905 HReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
50-76-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
568375Reference document
Same NSN cross-reference
Reference document — Secondary reference
667194Reference document
Same NSN cross-reference
Reference document — Secondary reference
121474Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 339?
339 is a POLARIZING KEY,ELECTRICAL CONNEC manufactured by Melissa & Doug. It is classified as a MRO (MRO_GENERAL).
What parts can replace 339?
There are 7 known substitutes for 339: 149135, 8905 H, 50-76-3 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 339?
339 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0206. 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.