What is the diameter and length of the part that goes into the lug hole? And how long is the 22mm uncompressed?

The diameter of the spring bar is 1.8mm (Due to dimensional tolerances, the diameter will be between 1.78mm and 1.80mm). you just need to measure the lug width of your watch (or buckle width if the spring bar is to be used for a buckle) to choose the spring bar. For the 22mm spring bar, the uncompressed length is 25.1mm, the compressed length is 21.8mm.

Will the 23mm fit Citizen Navihawk and world with a nato band??

I do not know. What are the specs on the original band? Mimic those specs.

Would this fit a Rolex submariner 20mm?

This is a good question! I have watches with 20mm and 22 mm lugs. Many nice straps. I wanted a stronger solution, so I ordered 23mm pins for my 22mm Promaster Tough. IMO, the pins are stronger the longer the main 1.8mm barrel and the less extended the telescoping pins. They fit nicely, so I ordered these 21mm pins for my Invicta divers, one a 9094 used as a beater work watch with "NATO" (actually, Zulu) straps. (I cut off the dingleberry strap to shorten the wearing height by 2-3mm, thus, making a NATO from a Zulu). The 21mm pins fit, but tightly. I don't recommend doing this with an end link, too tricky.

Wellfit Watch Pins Heavy Duty Spring Bar 4 Pack Stainless

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⌚️ Secure your style with strength and precision!

VALUE PACK OF FOUR - Keep your collection ready with four reliable pins—never miss a moment to upgrade or repair.
PRECISION 1 8 MM DIAMETER - Exact sizing ensures a secure, flawless fit for most watch bands and buckles.
HEAVY DUTY SPRING MECHANISM - High-quality spring steel core guarantees resilience and long-lasting performance.
PREMIUM 316 L STAINLESS STEEL - Engineered for corrosion resistance and hypoallergenic comfort—durability meets skin-friendly design.
UNIVERSAL FIT FOR EVERY WATCH - Seamlessly compatible with 18-26mm lug widths—your watch’s perfect match.

These heavy-duty spring bars are crafted from premium 316L stainless steel with a precise 1.8mm diameter, designed to fit a wide range of watch lug widths from 18mm to 26mm. Each pack includes four durable pins featuring a resilient spring steel core, ensuring reliable, corrosion-resistant performance for all your watch band needs.

Specifications

ASIN	B09WCH2WWH
Best Sellers Rank	17,680 in Fashion ( See Top 100 in Fashion ) 41 in Repair Tools & Kits
Customer reviews	4.3 4.3 out of 5 stars (4,052)
Date First Available	21 Aug. 2018
Item model number	180springbar
Manufacturer	Wellfit

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