UNC / UNF

UNC / UNF

Low head socket cap screws UNC/UNF
Standards ASME/ANSI 18.3 - Thread fit 3A
Heat treated alloy steel

Categories: , .

Ref: ?
Example: Ref. UNC = HCRNC - XX/XX - X XX/XX
Ref. UNF = HCRNF - XX/XX - X XX/XX
↑ ↑
D L
HCRNC (UNC)
1/4 x 1"1/4
Ref. = HCRNC - 1 - 4 - 1 - 1 - 4

D #8
UNC		 #10
UNC		 #10
(UNF)		 1/4”
UNC		 5/16”
UNC		 3/8”
UNC		 1/2”
UNC
D1 max. 0.270 0.312 0.312 0.375 0.437 0.562 0.750
K 0.085 0.098 0.098 0.127 0.158 0.192 0.254
S 5/64 3/32 3/32 1/8 5/32 3/16 1/4
Hilos/ “ 32 24 32 20 18 16 13
L1 Consultar página 579 · Visit the page 579 · Consulter pages 579 · Consultar a página 579
2.1 3.4 3.4 8.5 16.9 31.1 67.8
L 3/8 3/8 3/8 3/8 1/2 1/2 1”
1/2 1/2 1/2 1/2 3/4 3/4 1” 1/4
3/4 3/4 5/8 5/8 1” 1” 1 “1/2
1” 3/4 3/4 1” 1/4 1” 1/4
1” 1” 1/2 1 “1/2
Recommended tightening torque

Tensile strength 1117 N/mm2 min.
Hardness ≤1/2 39 HRC min. >1/2 37 HRC min.
Working temperatures -29º a +204ºC
Minimum elongation at fracture 8%
Box qty.
x50  
x100  

Ref: ?
Example: Ref. UNC = HCRNC - XX/XX - X XX/XX
Ref. UNF = HCRNF - XX/XX - X XX/XX
↑ ↑
D L
HCRNC (UNC)
1/4 x 1"1/4
Ref. = HCRNC - 1 - 4 - 1 - 1 - 4

* According to L1, fasteners above the blue line are completely threaded while those below are partially threaded.

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