Summary of Methods to Replace Missing Fixed Pins/Bars

Historically, military watch manufacturers have used various types of strap bars to secure watch straps, including spring pins, screw-in pins, and fixed solid bars. Each option is chosen based on customer or government requirements.

Some countries, such as the UK, require fixed solid bars for military-issued watches due to specific operational needs. The choice of strap bar ultimately depends on the best solution for a given watch model and its intended use.

No single solution is perfect—each has advantages and drawbacks. One common issue involves screw-in pins. When not properly secured with Loctite 243 or a similar threadlocker, these pins can loosen over time. Additionally, when replacement pins are unavailable or fixed bars have been forcibly removed, alternative solutions are necessary. Many watches with damaged strap bars appear at clearance sales and watch fairs, requiring repairs to restore functionality.

All of the products mentioned below are readily available from automotive stores, eBay, and Amazon. Choosing the right one depends on what’s available and the level of durability required. These solutions have been recommended by experienced watchmakers, collectors, and enthusiasts who have encountered these issues firsthand.

Generally, these repairs involve using a filler, putty, or solder in combination with solid replacement pins. The pins are inserted into the chosen bonding material until it sets or are soldered in place. The best method depends on what you have on hand: the first two solutions are straightforward, while the third requires a soldering iron.

Best for: Military watch repairs, especially for ex-military Pulsar, CWC, and MWC watches with damaged strap bars. Heavy-duty single-shoulder bars are recommended for long-lasting results.

Strength & Durability:

• Tensile Strength: 3,500 psi (24 MPa)
• Heat Resistance: Up to 500°F (260°C)
• Chemical Resistance: Resistant to oil, gasoline, water, and most solvents

Application & Limitations:

• Bonds to metal, wood, and concrete
• Can be drilled, sanded, and painted after curing
• Not suitable for high-stress structural loads

🔗 Permatex Liquid Metal Filler

Best for: A steel-reinforced, hand-mixable epoxy alternative for metal repairs.

Strength & Durability:

• Tensile Strength: 900 psi (6.2 MPa)
• Shear Strength: 700 psi (4.8 MPa)
• Heat Resistance: Up to 300°F (149°C)

Application & Suitability:

• Bonds to steel, iron, aluminum, copper, and brass
• Resistant to oil, gasoline, hydraulic fluids, and most chemicals
• Can be machined, sanded, and painted after curing
• Not suitable for high-load structural repairs

🔗 JB Weld SteelStik Epoxy Putty

Alternative for Higher Strength: JB Weld Original Cold Weld Epoxy (5,020 psi / 34.6 MPa)

Best for: Maximum durability, commonly used in jewelry and HVAC applications.

Strength & Durability:

• Tensile Strength: 40,000–70,000 psi (276–483 MPa)
• Shear Strength: ≈ 15,000 psi (103 MPa)
• Melting Point: 620–870°C (1,148–1,598°F)

Application & Suitability:

• Used in jewelry making and industrial applications
• Overkill for watch pin repairs but offers extreme durability

• For routine repairs: Permatex 25909 Liquid Metal Filler
• For higher strength needs: JB Weld SteelStik Epoxy Putty
• For extreme durability: Silver Solder (Hard Solder) (though unnecessary for most watch pin applications)

While some watchmakers and collectors advocate for silver soldering,  all of these options are effective, as the stress on the pin is relatively low. The right choice depends on your specific needs and available tools.