UNC, Nyloc Nut, Zinc.
Unified Coarse (UNC) 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 1/2 Nyloc Nut, Zinc Plated.
Fixaball.co.uk sells all sizes of UNC nylon insert nutst, at the best internet prices, with free delivery.
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Nuts are almost always used opposite a mating bolt to fasten a stack of parts together. The two partners are kept together by a combination of their threads' friction, a slight stretch of the bolt, and compression of the parts.
A nyloc nut is a nut that locks, in a sense or is self-sticking and is less likely to loosen due to vibrations or stress. This is achieved through the addition of the nylon insert that has a diameter slightly smaller than the nuts’ thread. A fastener screwed into the nut cuts a thread into the plastic, therefore increasing the compression around it (tighter join). A nyloc nut is effective up to 121°C
UNIFIED THREAD STANDARDS
The basic American standards for fastening screw threads as agreed upon by standard bodies of U.K, Canada and the United States.
Unified National Coarse (UNC)is a thread form with a 60 degree flank angle, rounded roots and flat crests. For a given diameter it has a larger thread pitch than an equivalent diameter UNF thread. The unified thread is based on inch sizes and was first standardised in 1948 unifying the Whitworth and American standard thread forms.
Unified National Extra Fine (UNEF) is a Unified thread form with a very fine (small) pitch that are typically used on instruments and parts requiring a fine adjustment.
Unified National Fine (UNF) is a thread form with a 60 degree flank angle, rounded roots and flat crests. For a given diameter it has a smaller thread pitch than an equivalent diameter UNC thread.
Unified National (UN) thread form with a rounded root contour, applies only to external threads. The UN thread form has a flat, or optionally, a rounded root contour.
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