Model: 12981727-1

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.490 inches and 0.510 inches
Fastener Length
Between 3.700 inches and 3.720 inches
Head Style
Knurled no. 6
Head Diameter
Between 0.495 inches and 0.505 inches
Head Height
Between 2.020 inches and 2.040 inches
Distance From Largest Bearing Surface Of Head To End Of Third Diameter
3.710 inches
Thread Diameter
0.250 inches
Nonstandard Thread Pitch Diameter
+0.2139/+0.2175 inches
Thready Qty Per Inch (tpi)
20
Material
Steel comp 303
Material Specification
Astm a581, a582 or ams 5640 assn standard single material response
Surface Treatment Specification
Mil-std-171, para 5.4.1 military standard single treatment response
Thread Series Designator
Unc
NSN
5305-01-450-3253
Part Number
12981727-1
Description
Thumbscrew
CAGE
19200

An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use screw (as modified) or bolt (as modified).

Part 12981727-1 NSN 5305-01-450-3253

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06673
FIIG:
A003B0
Concept No.:
App. Key:
SR
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:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
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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