Model: 6557

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
1.610 inches
Fastener Length
2.094 inches
Head Style
Knurled no. 1
Head Diameter
1.000 inches
Head Height
0.312 inches
Point Length
0.359 inches
Point Diameter
0.375 inches
Point Style
Universal
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Point Swivel Included Angle
20.0 degrees
Material
Steel comp 1213
Material Specification
Sae assn standard single material response
Surface Treatment
Oxide or cadmium and chromate
Surface Treatment Specification
Mil-c-13924 military specification 1st treatment response or qq-p-416, type 2, cl 3 federal specification 2nd treatment response
Thread Series Designator
Unc
NSN
5305-00-852-5056
Part Number
6557
Description
Thumbscrew
CAGE
01226

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 6557 NSN 5305-00-852-5056

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:
U
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

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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