OmniSynk Distribution Services

ST3M455-4L20-1

Screw, Close Tolerance

Part number
ST3M455-4L20-1
NSN
5305-00-316-8103
NIIN
00-316-8103
Item name
Screw, Close Tolerance
Manufacturer
Alcoa Global Fasteners Inc.
CAGE code
06950
FSC
5305
Unit of issue
EA
DEMIL code
A

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Alternate part numbers

Technical characteristics

Thread Class
3A
Thread Direction
Right-hand
Thread Length
0.444 inches minimum and 0.494 inches maximum
Fastener Length
1.704 inches minimum and 1.734 inches maximum
Head Style
Fillister countersunk
Head Diameter
0.389 inches minimum and 0.394 inches maximum
Head Height
0.015 inches maximum
Grip Diameter
0.2490 inches minimum and 0.2495 inches maximum
Internal Drive Style
High-torque
Nominal Thread Diameter
0.250 inches
Grip Length
1.240 inches minimum and 1.260 inches maximum
Thread Quantity per Inch
28
Countersink Angle
99.0 degrees minimum and 101.0 degrees maximum
Material
Steel corrosion resisting overall
Material Document and Classification
23-112, fscm 76301 mfr ref single material response overall
Surface Treatment
Passivate overall
Thread Series Designator
UNJF
Catalogue data is compiled from public DLA/FLIS sources and is provided for identification. Availability, condition and certification are confirmed on quotation. OmniSynk Distribution Services is a stocking distributor.

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