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STANDARD LOCKNUT KM21 Bearing Locknut, Metric, 4 31/32 in Face Dia - Bearing Locknuts
STANDARD LOCKNUTBearing Locknuts

STANDARD LOCKNUT KM21 Bearing Locknut, Metric, 4 31/32 in Face Dia

The STANDARD LOCKNUT Bearing Lock Nut, model KM21, is a metric bearing locknut with a 4 31/32 in face diameter. This product is identified by the manufacturer part number KM21 and industry number KM21.

SKU 3G-OTH-95928

Also listed as: KM 21 · KM-21

Brand
STANDARD LOCKNUT
Item
KM21 Bearing Locknut, Metric, 4 31/32 in Face Dia
Category
Bearing Locknuts
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

STANDARD LOCKNUT
Manufacturer Part Number
KM21
Industry Number
KM21

Technical Documents

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STANDARD LOCKNUT Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The STANDARD LOCKNUT Bearing Lock Nut, model KM21, is a metric bearing locknut with a 4 31/32 in face diameter. This product is identified by the manufacturer part number KM21 and industry number KM21.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a STANDARD LOCKNUT KM21 bearing lock nut used for?

The STANDARD LOCKNUT KM21 is a metric bearing lock nut used to secure bearings onto shafts in industrial machinery. It prevents axial movement and maintains proper bearing preload in applications such as conveyors, pumps, and gearboxes across machining, power transmission, and material handling systems.

What are the specifications of the STANDARD LOCKNUT KM21?

The STANDARD LOCKNUT KM21 is a metric bearing lock nut with a face diameter of 4 31/32 in. Its manufacturer part number and industry number are both KM21. This lock nut is designed for securing metric-series bearings and is commonly used in rotating equipment requiring precise axial retention.

Where to buy STANDARD LOCKNUT KM21 worldwide?

3G Electric supplies the STANDARD LOCKNUT KM21 bearing lock nut to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this metric lock nut for your bearing assembly needs.

How to install a STANDARD LOCKNUT KM21 bearing lock nut?

To install the STANDARD LOCKNUT KM21, clean the shaft threads and bearing face, then hand-thread the lock nut onto the shaft. Use a spanner wrench on the nut's notches to tighten to the torque specified by the bearing manufacturer. Always verify preload and secure with a lock washer if required.

Used in

Common applications for STANDARD LOCKNUT
Conveyor systems — STANDARD LOCKNUT bearing locknuts and lock washers secure bearings on conveyor roller shafts
Pump assemblies — Withdrawal sleeve assemblies like SNW3028 mount bearings on pump shafts for alignment and retention
Gearbox maintenance — STANDARD LOCKNUT lock washers (e.g., W38) used with N00 lock nuts to secure bearings in gearbox housings
Compressor units — Bearing locknuts (e.g., N14) provide axial clamping for compressor rotor bearings
Industrial fans — STANDARD LOCKNUT lock washers (e.g., TW128) with NHE lock nuts retain bearings in fan shaft assemblies
Machine tool spindles — Withdrawal sleeve assemblies (e.g., SNP3064) enable precise bearing mounting on spindle shafts

STANDARD LOCKNUT Products

3G Electric supplies STANDARD LOCKNUT bearing locknuts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cross-referenced by specification & description
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