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 JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Secure your style with precision-engineered strength!

VALUE PACK OF FOUR - Get four reliable spring bars per pack—perfect for multiple watches or quick replacements.
PRECISION 1 8 MM DIAMETER - Engineered to exact tolerances (1.78-1.80mm) for a flawless, snug fit every time.
HEAVY DUTY SPRING MECHANISM - High-quality spring steel core offers resilience and strength, keeping your watch band locked in place.
PREMIUM 316 L STAINLESS STEEL - Crafted from corrosion-resistant, hypoallergenic steel that guarantees durability and a sleek finish.
UNIVERSAL FIT FOR EVERY WATCH - Seamlessly compatible with 18-26mm lug widths, ensuring your watch stays secure no matter the brand.

Wellfit Watch Pins are heavy-duty 316L stainless steel spring bars designed with a precise 1.8mm diameter to fit any watch lug width from 18mm to 26mm. Resistant to corrosion and hypoallergenic, these durable pins ensure your watch band stays securely fastened, making them an essential upgrade for watch enthusiasts and professionals alike.

Specifications

ASIN	B09WCH2WWH
Best Sellers Rank	14,744 in Fashion ( See Top 100 in Fashion ) 34 in Repair Tools & Kits
Customer reviews	4.3 4.3 out of 5 stars (4,053)
Date First Available	21 Aug. 2018
Item model number	180springbar
Manufacturer	Wellfit

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