Rack and fender eyelets screw size
M5 · 10 to 16 mm long
Our records put Rack and fender eyelets on M5 screws in lengths from 10 to 16 mm.
Where it is used: frame and fork eyelets for racks and mudguards.
This entry is marked confirmed and comes from sheldonbrown.com.
An M5 screw is 5 mm in diameter with a 0.8 mm pitch, tapped with a 4.2 mm drill; imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
Rack and fender eyelets screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M5 | 10–16 mm | 0.8 mm | not stated | not stated | frame and fork eyelets for racks and mudguards | Confirmed |
Fitment records and sources
frame and fork eyelets for racks and mudguards
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 10–16 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- Stacking frame + rack tab + fender stay needs 18-20mm bolts, not the 12-16mm that come with a cage.
- APC Easy PDU rack-mount screws are self-tapping M5x10, intended for the PDU's own mounting brackets rather than standard rack cage-nut threads.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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Devices whose records share a thread with Rack and fender eyelets, closest length match first.
- Rear-view / side mirror bracket also M5 × 10–16 mm
- Marine-grade set/grub screw (DIN 916, A4 stainless) also M5 × 10 mm
- Triumph Thruxton rear mounting bracket also M5 × 12 mm
- BYD Battery-Box Premium LVS also M5 × 14 mm
- RF Elements Twin Horn antenna bracket (secondary hardware) also M5 × 12 mm
- Badger Meter M5000 Remote Junction Box Kit also M5 × 16 mm
- Alpha Series forklift mast bracket also M5 × 16 mm
- Leviton EV Series charging pedestal (EPED1 / EPED2) also M5 × 12–16 mm
Questions about Rack and fender eyelets screws
- What size screw does Rack and fender eyelets use?
- M5 × 10–16 mm for frame and fork eyelets for racks and mudguards.
- How long are the screws in Rack and fender eyelets?
- The records range from 10 to 16 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for Rack and fender eyelets?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.