Model: 21-1527

Hexagon Head Cap Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.750 inches
Fastener Length
0.750 inches
Head Height
Between 0.272 inches and 0.291 inches
Width Between Flats
Between 0.612 inches and 0.625 inches
Thread Diameter
0.438 inches
Thready Qty Per Inch (tpi)
14
Min. Tensile Strength (psi)
74000 pounds per square inch
Hardness Rating
80.0 rockwell b
Surface Finish
125.0 microinches grip
Surface Finish
125.0 microinches bearing surface of head
Surface Finish
63.0 microinches threads
Material
Steel
Material Specification
Sae gr 2 assn standard single material response
Thread Series Designator
Unc
Nondefinitive Specification/std Data
2 type and 10p style and 2 grade
NSN
5305-00-010-0145
Part Number
21-1527
Description
Screw,cap,hexagon Head
CAGE
66935

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. the threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. the thread length being the controlled dimension, the grip length is not specified. a locking feature may be incorporated in the design of the head or threads. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. excludes bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

Part 21-1527 NSN 5305-00-010-0145

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
18257
FIIG:
A003B0
Concept No.:
App. Key:
SB
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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