Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee M5 Nylon Insert Hex Nut
Model Number: 06-57-0625
The Milwaukee 06-57-0625 M5 Nylon Insert Hex Nut is a genuine OEM replacement service fastener used across Milwaukee's M18 FUEL QUIK-LOK outdoor power tool platform, with confirmed compatibility on the Milwaukee 2825-20 M18 FUEL QUIK-LOK Power Head (Serial K49A, documented in Milwaukee service bulletin 54-49-2810 dated October 2024) and the Milwaukee 49-16-2740 M18 FUEL QUIK-LOK Rubber Broom Attachment (documented in Milwaukee service bulletin 54-49-2815). Milwaukee documents this part at Figure 27 on both bulletins, and specifies a quantity of two of these nuts per tool at that service position. The M5 Nylon Insert Hex Nut specification identifies the fastener as a metric 5mm standard-thread hex nut with an integrated nylon insert ring at the top of the nut body. As the nut is threaded onto its mating bolt, the mating bolt threads cut into the nylon insert, and the nylon material grips the bolt threads under continuous elastic pressure. This grip prevents vibration-induced loosening throughout the tool's service life, which is critical on outdoor power equipment where continuous engine vibration, jobsite handling, and temperature cycling would progressively loosen a conventional non-locking hex nut.
A stripped, broken, missing, or nylon-insert-depleted lock nut compromises the assembly integrity at its specific service location and can allow the retained component to work loose during operation. On the QUIK-LOK Power Head and Rubber Broom Attachment platforms specifically, the M5 Nylon Insert Hex Nut is used at critical retention positions where fastener security directly affects tool function and operator safety. Replacing the nut with this OEM service part restores correct fastener retention and vibration resistance. Milwaukee specifies a quantity of TWO of these nuts per service location per bulletin, so when servicing either the 2825-20 Power Head or the 49-16-2740 Rubber Broom Attachment, customers should plan to order two nuts to replace both positions during a full service. Important note about nylon insert lock nuts: the nylon material is typically single-use, meaning once the nut has been threaded onto a bolt and removed, the nylon insert is deformed by the bolt threads and no longer grips the bolt with the original clamping force. Milwaukee's design engineers specify replacement of nylon insert lock nuts each time they are removed for service, rather than reusing the original nut - this is standard mechanical engineering practice for critical fastener positions and is why Milwaukee lists this small part as a service component in the parts bulletin. Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before ordering. Milwaukee uses many different lock nut part numbers across their broader tool catalog (including 06-57-5200 and 06-57-5000 Lock Nuts for different applications), all of which are NOT interchangeable with the 06-57-0625 M5 Nylon Insert Hex Nut. The other companion service parts on bulletins 54-49-2810 and 54-49-2815 vary by tool model - order companion service parts by your specific tool's serial number rather than by assumption. Verify by serial number using Milwaukee's online parts lookup before ordering to confirm correct fitment.
Features
- Genuine Milwaukee OEM replacement service fastener, direct factory part for the 06-57-0625 reference
- M5 (5mm) standard metric thread specification
- Hex nut geometry with integrated nylon insert ring at the top of the nut body
- Nylon insert grips mating bolt threads under continuous elastic pressure to prevent loosening
- Cross-platform fitment across Milwaukee's M18 FUEL QUIK-LOK outdoor power tool ecosystem
- Confirmed compatibility on the Milwaukee 2825-20 M18 FUEL QUIK-LOK Power Head (Serial K49A)
- Confirmed compatibility on the Milwaukee 49-16-2740 M18 FUEL QUIK-LOK Rubber Broom Attachment
- May also fit additional Milwaukee QUIK-LOK attachments (verify by serial number)
- Milwaukee specifies quantity of two nuts per tool at documented service positions
- Documented as Figure 27 on Milwaukee service bulletins 54-49-2810 and 54-49-2815
- Prevents vibration-induced loosening throughout outdoor power tool service life
- Resists loosening from jobsite handling, temperature cycling, and continuous vibration
- Recommended for replacement each time the nut is removed for service (nylon insert is single-use)
- Manufactured to Milwaukee factory tolerances and material specifications
- Direct-fit replacement, no modification required for installation
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 06-57-0625
- Official Description: M5 Nylon Insert Hex Nut
- Component Type: Metric Nylon Insert Lock Nut (Nylock-Style)
- Thread Specification: M5 (5mm standard metric thread)
- Nut Geometry: Hex (6-sided)
- Locking Mechanism: Integrated nylon insert ring
- Confirmed Compatible Models: Milwaukee 2825-20 M18 FUEL QUIK-LOK Power Head (Serial K49A), Milwaukee 49-16-2740 M18 FUEL QUIK-LOK Rubber Broom Attachment (plus additional Milwaukee QUIK-LOK attachments - verify by serial number)
- Tool Platform: Milwaukee M18 FUEL QUIK-LOK Attachment System
- Service Bulletin References: 54-49-2810 Fig 27 (2825-20 Power Head), 54-49-2815 Fig 27 (49-16-2740 Rubber Broom Attachment)
- Required Quantity Per Tool: 2 nuts per documented service position
- Related but NOT Interchangeable Parts: Milwaukee 06-57-5200 Lock Nut, 06-57-5000 Lock Nut (different applications)
- Quantity: Sold individually, 1 nut per order
- Part Type: OEM Service Replacement Fastener
Includes
- (1) Milwaukee 06-57-0625 M5 Nylon Insert Hex Nut
- Note: Milwaukee specifies TWO of these nuts per documented service position. Order quantity 2 for a complete service, and replace both positions at the same time to maintain consistent fastener condition
- NOT Included: Mating bolts, washers, or other companion hardware. The mating bolt at each service position varies by Milwaukee tool model - refer to your tool's parts diagram for the correct mating hardware part numbers, sold separately
- Note: The nylon insert in these nuts is typically single-use. If the nut has been previously threaded onto a bolt and removed, the nylon insert is deformed and no longer grips the bolt with the original clamping force. Milwaukee recommends replacement each time the nut is removed for service
- Note: This part is NOT interchangeable with the closely-numbered Milwaukee 06-57-5200 or 06-57-5000 Lock Nuts, which serve different applications. Verify your tool's catalog number and serial number against the official Milwaukee parts diagram before ordering
