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3a
0.281in. ⁓9/32"
0.847in. ⁓55/64"
hexagon
apache attack helicopter
0.250in. ⁓1/4"
28
3500 pounds per square inch
4300 pounds per square inch
screw, captive
material screw alloy steel 8740, per ams 6322 or equivalent, sleeve cres 304, per AMS-QQ-S-763; heat treatment screw harness rc 38-41, sleeve none; finish screw cadmium plate per ams QQ-P-416, type ii, class 2, sleeve cadmium plate per AMS-QQ-P-416, type ii, class 2; thread per MIL-S-8879; driver size 0.250 inch; shoulder 0.193 dia porm 0.003; head 0.475 inch dia; head cross 0.168, width 0.281, hex 0.181 inch; grip thickness 0.188-0.250 inch
unjf
A headed, threaded fastening device with special square threads, which is designed to be attached to a panel by means of a retaining washer. The screw fastener is used in conjunction with a speed nut to facilitate fastening two items.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Item does not contain precious metal.
No known electrostatic discharge (esd) or electromagnetic interference (emi) sensitivity.
Represents items with no adp components
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.