Model: 221B1580P1

Hexagon Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.297 inches
Fastener Length
0.368 inches
Head Style
Hexagon countersunk
Head Height
0.120 inches
Width Between Flats
Between 0.365 inches and 0.377 inches
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Countersink Angle
100.0 degrees
Material
Steel comp 4037 or steel comp 8630
Material Specification
Ams6300 assn standard 1st material response or il-s-6050 federal standard 10th material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 ty2 cl2 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-01-352-8882
Part Number
221B1580P1
Description
Screw,cap,hexagon Head
CAGE
99971

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 221B1580P1 NSN 5305-01-352-8882

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:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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