NRA series square precision locking nutDetailed product description：

NRA series square precision locking nut

Model: NRA4-0.5 NRA5-0.5 NRA6-0.75 NRA8-1 NRA10-1 NRA12-1 NRA15-1 NRA17-1 NRA20-1 NRA25-1.5 NRA30-1.5 NRA35-1.5 NRA40-1.5

Material: 42CrMo4 Tempered hardness: HRC28 °~32 ° Thread accuracy: ISO 4H Precision turning Plane deviation: 0.005mm

Product Specifications	Thread and pitch	D	h	d	L	F	m
NRA  4-0.5	M 4x0.5	eleven point five	five	eight	two point seven	ten	M2.6
NRA  5-0.5	M 5x0.5	thirteen point five	five	nine	two point seven	eleven	M2.6
NRA  6-0.75	M 6x0.75	fourteen point five	five	ten	two point seven	twelve	M3 x 0.5
NRA  8-1	M 8x1.0	seventeen	six point five	thirteen	four	fourteen	M3 x 0.5
NRA  10-1	M10x1.0	twenty	eight	sixteen	five	seventeen	M3 x 0.5
NRA  12-1	M12x1.0	twenty-two	eight	seventeen	five	nineteen	M3 x 0.5
NRA  15-1	M15x1.0	twenty-five	ten	twenty-one	six	twenty-two	M3 x 0.5
NRA  17-1	M17x1.0	thirty	thirteen	twenty-five	nine	twenty-four	M4 x 0.7
NRA  20-1	M20x1.0	thirty-five	thirteen	twenty-six	eight	thirty	M4 x 0.7
NRA  25-1.5	M25x1.5	forty-three	fifteen	thirty-three	ten	thirty-five	M5 x 0.8
NRA  30-1.5	M30x1.5	forty-eight	twenty	thirty-nine	fourteen	forty	M6 x 1.0
NRA  35-1.5	M35x1.5	sixty	twenty-one	forty-six	fourteen	fifty	M8 x 1.25
NRA  40-1.5	M40x1.5	sixty-three	twenty-five	fifty-one	eighteen	fifty	M8 x 1.25