Model: 257-9
SetscrewProperties:
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.594 inches and 0.656 inches
Fastener Length
Between 0.719 inches and 0.781 inches
Head Style
Square
Head Height
Between 0.270 inches and 0.295 inches
Width Between Flats
Between 0.344 inches and 0.406 inches
Hole Diameter
0.094 inches
Point Style
Cup
Internal Drive Style
W/o internal drive
Thread Diameter
0.375 inches
Hole Quantity
1
Hole Type
Drilled
Thready Qty Per Inch (tpi)
16
Hardness Rating
30.0 rockwell c and 37.0 rockwell c
Hole Configuration Style
Square longitudinal hole
Material Specification
66 federal standard all material responses
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 type 2 cl 3 federal specification all treatment responses
Thread Series Designator
Unc
NSN
5305-00-255-0074
Part Number
257-9
Description
Setscrew
CAGE
Part 257-9 NSN 5305-00-255-0074
INC:
06672 FIIG:
A003B0 Concept No.:
App. Key:
SQ Cond. Code:
1 Status:
A Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsHMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
SX
CRITL:
X Freight Classification
NMFC:
093486 UFC:
48950 LTL:
RATING VARIABLE LCL:
-- WCC:
713 TCC:
Z SHC:
9 ACC:
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