Model: 181608

Shoulder Screw

Special Features:

Roove 0.083 in. Lg 0.369 in. Dia. And slot in thd end

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.327 inches and 0.357 inches
Fastener Length
Between 0.660 inches and 0.690 inches
Head Style
Flat chamfer
Head Diameter
Between 0.740 inches and 0.760 inches
Head Height
Between 0.333 inches and 0.368 inches
Shoulder Diameter
0.615 inches first shoulder and 0.635 inches first shoulder
Shoulder Length
0.240 inches first shoulder and 0.260 inches first shoulder
Shank Unthreaded Hole Diameter
0.077 inches first hole and 0.087 inches first hole
Internal Drive Style
Slot
Thread Diameter
0.438 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
38.0 rockwell c and 46.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center
0.125 inches first hole
Shoulder Shape
Round first shoulder
Material
Steel comp 4140
Surface Treatment
Phosphate
Thread Series Designator
Unf
NSN
5305-00-600-8993
Part Number
181608
Description
Screw,shoulder
CAGE
10001

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes bolt, internal wrenching and screw, cap, socket head.

Part 181608 NSN 5305-00-600-8993

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22846
FIIG:
A003B0
Concept No.:
App. Key:
SL
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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