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Machine Screw - AN503-8-8

Machine Screw - AN503-8-8

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Machine Screw - AN503-8-8
Aeronautical Standard

Description: Machine Screw
Part Number: AN503-8-8
Alternate Part Numbers: A1635-40, 78315, 931.45.16.310, 416-258

 

Product Overview:

An externally threaded fastener whose threaded portion is of one diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

 

Item Specification:

Thread Class

     

3A

Thread Direction

Right-hand

Thread Length

0.344 inches minimum and 0.469 inches maximum

Fastener Length

0.500 inches nominal

Head Style

Fillister

Head Diameter

0.250 inches minimum and 0.270 inches maximum

Head Height

0.106 inches minimum and 0.113 inches maximum

Hole Diameter

0.045 inches nominal

Internal Drive Style

Cross recess type 1

Nominal Thread Diameter

0.164 inches

Hole Quantity

1

Thread Quantity per Inch

32

Minimum Tensile Strength

125000 pounds per square inch

Hardness Rating

26.0 rockwell C minimum and 32.0 rockwell C maximum

Screw Material

Steel comp 8630

Screw Material Document and Classification

MIL-S-6050 mil spec single material response or AN-S-9 mil std single material response

Screw Surface Treatment

Cadmium

Screw Surface Treatment Document and Classification

QQ-P-416, ty 1, cl 3 fed spec single treatment response

Head Hole Configuration Style

Round

Thread Series Designator

UNC

 

 

Fits In:

  1. ·         Bombardier Learjet 55
  2. ·         Bombardier Learjet 60 - all variants
  3. ·         Textron Aviation Beechcraft King Air 100 - all variants
  4. ·         Textron Aviation Beechcraft King Air 200 - all variants
  5. ·         Textron Aviation Beechcraft King Air 300 - all variants
  6. ·         Textron Aviation Beechcraft King Air 90 - all variants
  7. ·         Textron Aviation Cessna 550 Citation I-II-Bravo