KM 03, KM 07 & H 316: Matching Lock Nuts and Adapter Sleeves

Matching HI-TEC lock nuts to adapter sleeves depends on exact thread specifications and shaft diameters, with nuts like the KM 03, KM 07, and KM 12 fitting smaller metric threads while the H 316 sleeve uses an M80 x 2 thread. For instance, HI-TEC KM lock nuts - such as the KM 03, KM 07, and KM 12 - feature distinct thread pitches and pitch diameters designed for specific shaft and sleeve sizes, while the H 316 adapter sleeve features a dedicated M80 x 2 thread and a 1:12 taper.

Selecting mounting accessories purely by series number or estimated shaft size often leads to costly assembly failures and premature bearing breakdown in Indonesian industrial plants. Whether you are overhauling conveyor drives in Cikarang or servicing agricultural machinery in Surabaya, getting the exact thread-to-bore match is critical for proper internal clearance and vibration-free operation.

This guide breaks down the exact technical specifications for HI-TEC KM 03, KM 07, KM 12 lock nuts and the H 316 adapter sleeve, outlining the step-by-step verification process to ensure zero fitting errors.

Which lock nut matches the H 316 adapter sleeve and KM series components?

The HI-TEC H 316 adapter sleeve matches an M80 x 2 thread lock nut (typically a KM 16 nut), while KM series lock nuts such as the KM 03 lock nut, KM 07 lock nut, and KM 12 lock nut serve smaller, specific shaft diameters. A common misconception among maintenance personnel is assuming that any KM series nut fits any H series adapter sleeve. In reality, each specific part number dictates exact metric thread dimensions, outside diameters, and face widths standard under DIN 981^[1][2].

When securing a bearing to a smooth or stepped shaft using an adapter sleeve, the lock nut threads directly onto the sleeve to drive the bearing up its 1:12 tapered seat^[3][4]. Choosing an incorrect lock nut designation results in mismatched thread pitches, preventing lock washer engagement and risking sudden axial displacement during heavy load cycles in factory operations.

As shown in the technical specifications, the H 316 adapter sleeve converts a 70 mm cylindrical shaft to accept an 80 mm tapered-bore bearing^[3][4]. It cannot be secured using a KM 03, KM 07, or KM 12 nut, as those lock nuts feature far smaller M17, M35, and M60 threads respectively^[1][2]. Matching lock nuts and adapter sleeves correctly preserves axial preloading and protects machine components from premature failure.

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How do I determine and verify the right KM lock nut and sleeve size?

To determine and verify lock nut and adapter sleeve sizing correctly, you must measure the physical shaft diameter, identify the bearing's inner bore taper, and match the corresponding thread pitch. Never order replacement lock nuts or sleeves based solely on visual appearance or outer dimensions, as even minor thread pitch variances - such as 1.5 mm versus 2.0 mm - will ruin component threads during assembly.

Follow this 4-step verification routine before placing your component order:

1. Measure the Shaft Bore: Caliper the cylindrical shaft where the adapter sleeve sits. For an H 316 sleeve, the shaft diameter must measure exactly 70 mm^[3][4].
2. Check the Bearing Seat Taper: Verify that the bearing features a 1:12 metric taper designed to climb the adapter sleeve body^[3][4].
3. Identify the Thread Size: Check the metric thread on the sleeve or shaft end. A KM 03 uses M17 x 1, KM 07 uses M35 x 1.5, KM 12 uses M60 x 2, and the H 316 sleeve uses M80 x 2^[3][1][2].
4. Match the Locking Washer: Pair each KM nut with its corresponding MB tab washer (such as MB 3, MB 7, MB 12, or MB 16) to lock the assembly into place^[3][1][2].

If you are uncertain about part numbers or need assistance cross-referencing your machinery requirements, HI-TEC ASIA provides direct technical verification. Indonesian workshop technicians and purchasing teams can confirm exact specifications and request direct assistance for HI-TEC KM lock nuts and H 316 sleeves via WhatsApp at +62 823-1004-6527.

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Frequently Asked Questions

Which lock nut matches the H 316 adapter sleeve?

The H 316 adapter sleeve features an M80 x 2 thread and is designed to take a KM 16 lock nut along with an MB 16 lock washer. Smaller lock nuts like the KM 03, KM 07, or KM 12 have smaller thread diameters and will not thread onto an H 316 sleeve.

Are bearing lock nuts within the same KM series interchangeable?

No, KM series lock nuts are not interchangeable across different numbers. Each KM designation specifies a unique metric thread pitch, thread diameter, nut width, and outside diameter standardized under DIN 981.

How do I determine the right KM lock nut for my sleeve and bearing size?

Determine the correct KM lock nut by measuring the external thread diameter and thread pitch of your shaft or adapter sleeve. Match the thread designation (e.g., M17 x 1 for KM 03, M35 x 1.5 for KM 07, M60 x 2 for KM 12) to the corresponding KM part number.

How can I inquire about HI-TEC KM lock nuts and H 316 sleeves on WhatsApp?

You can send your part numbers, shaft dimensions, and machinery requirements directly to the HI-TEC technical team via WhatsApp at +62 823-1004-6527 for quick specification checks and sales inquiries across Indonesia.

References

1. Stainless Steel KM Lock Nuts. https://www.fixawell.com/din981-stainless-steel-km-lock-nuts.htm (2025-06-18)
2. DIN 981 KM Lock Nuts Standard | Fasenco. https://www.fasenco.com/din-981/ (2025-09-10)
3. www.skf.com › group › productsH 316 - Adapter sleeves | SKF. https://www.skf.com/group/products/rolling-bearings/accessories/adapter-sleeves/productid-H%20316 (2026-10-03)
4. View product details on medias. https://medias.schaeffler.nl/en/p/pdf/408377 (2026-06-11)