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Metric nuts and fittings for 1/4" brake line

SAVE up to 50% when you buy nut packs and assortments!

Metric thread brake line nuts, unions, tees, and adaptors.

Common and hard to find brake line nuts to fit 1/4" brake line.

All nuts are steel except where followed by ss (stainless steel) or br (brass)

Nuts will vary in color.

If you don't see what you require, please contact us.
Satisfaction guaranteed. Please see our return policy.

The part number indicates the tube size used.
-3 is 3/16", -4 is 1/4", -5 is 5/16", -6 is 3/8" , -8 is 1/2"

Shops, wholesalers, schools and military personnel (.edu, .gov, .mil) -call for pricing.
Displaying products 1 - 8 of 8 results
M8-4
M8-4
Price: $4.50
View M8-4
12mm x 1.0 male steel nut with non threaded lead, SAE (double) and DIN (bubble) flare. 20mm long
M8-6mmbr
M8-6mmbr
Price: $7.00
View M8-6mmbr
12mm x 1.0 male with lead 16mm long
M12-4
M12-4
Price: $10.00
View M12-4
14mm x 1.5 male steel nut with non threaded lead, DIN (bubble) flare. 21mm long. Late model domestic.
M15-4
M15-4
Price: $11.00
View M15-4
12mm x 1.0 female 20mm overall
UM15-3-4br
UM15-3-4br
Price: $16.00
View UM15-3-4br
12mm x 1.0 DIN (bubble) flare, 33mm long.
UM20-4
UM20-4
Price: $16.00
View UM20-4
12mm x 1.0, SAE (double) flare, 29mm long. Female steel union. Use with M8-4 nut and SAE (double) flared 1/4" or 6mm brake line.
TM20-4
TM20-4
Price: $28.00
View TM20-4
12mm x 1.0, SAE (double) flare, 29mm long. 3 way female brass Tee.
#21 Nut Assortment
#21 Nut Assortment
Price: $102.95
View #21 Nut Assortment
Master metric nut asst. for 3/16” & 1/4” brake line (57 pieces): (save over 50% off individual nut prices)
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